UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) ~~August~~September 2527, 2004

STRUCTURED ASSET SECURITIES CORPORATION (as Depositor under the Trust Agreement dated as of April 1, 2004, providing for the issuance of Structured Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2004-9XS
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction
of incorporation)

333-106925
(Commission
File Number)

74-2440850
(IRS Employer
Identification No.)

745 Seventh Avenue, 7th Floor, New York, NY
(Address of principal executive offices)

10019
(Zip Code)

Registrant's telephone number, including area code 212-526-7000

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Section 8 - Other Events

Item 8.01. Other Events.

This current report on Form 8-K relates to the monthly distribution reported to the holders of Structured Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2004-9XS, which was made on ~~August~~September 2527, 2004.

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

99.1 Monthly distribution report pursuant to Section 4.03 of the Trust Agreement for the distribution on ~~August~~September 2527, 2004.

(Exhibit No. Description)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

LASALLE BANK NATIONAL ASSOCIATION, IN ITS CAPACITY AS TRUSTEE UNDER THE TRUST AGREEMENT ON BEHALF OF STRUCTURED ASSET SECURITIES CORPORATION, REGISTRANT

By: /s/ Russell Goldenberg Russell Goldenberg Group Senior Vice President Date: ~~August~~September 30, 2004

Structured Asset Securities Corporation Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Reporting Package Table of Contents Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Administrator:Christopher Lewis 312.904.7992christopher.lewis@abnamro.com Analyst:Dinsmore Sohn 714.259.6258 dinsmore.sohn@abnamro.com Statement Date: 135 S. LaSalle Street, Suite 1625Chicago, IL 60603USA Statements to CertificateholdersComponent Detail ReportCash Reconciliation SummaryBond Interest Reconciliation Shortfall Summary Report Other Related InformationAsset-Backed Facts ~ 15 Month Loan Status Summary Part I Asset-Backed Facts ~ 15 Month Loan Status Summary Part IIAsset-Backed Facts ~ 15 Month Loan Payoff/Loss SummaryRealized Loss Detail Page 2-3Page 4Page 5-7Page 8 Page 9 Page 10Page 11-13 Page 14-16Page 17-19 Page 20-22 Substitution Detail History Page 23 Page(s) Information is available for this issue from the following sources Issue Id: Monthly Data FileName: SASC49XS SASC49XS_200408_3.ZIP Closing Date: First Payment Date: Rated Final Payment: Date: 30-Apr-0425-May-04 25-May-34 Parties to The Transaction Depositor: Structured Asset Securities Corporation Underwriter: Lehman Brothers Inc. Master Servicer: Aurora Loan Services, Inc. Rating Agency: Standard & Poor's/Moody's Investors Service, Inc. 800.246.5761 LaSalle Factor Line LaSalle Web Site Servicer Web Site www.alservices.com www.etrustee.net Page 1 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Class CUSIP Original Opening Principal Principal Negative Closing Interest Interest Pass-Through Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Next Rate(3) WAC:WAMM:Current Index:Next Index: Payment Date:Prior Payment:Next Payment:Record Date: 6.527747% 1.450000%1.615000% 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Structured Asset Securities Corporation Mortgage Pass-Through Certificates Series 2004-9XS Face Value (1) Balance Payment Adj. or Loss Amortization Balance Payment (2) Adjustment Rate 353 REMIC 3 Statement Date: ABN AMRO Acct: 721781.2 847.981649569 43.994846218 0.000000000 803.986803351 1.102376162 1.725000000% 0.00 0.00 0.000000000 1.56000000% 0.000000000 86359BQV6 1-A1A 105,864,000.00 89,770,729.35 4,657,470.40 0.00 85,113,258.95 116,701.95 847.981649607 43.994846125 0.000000000 803.986803482 1.328504438 1.880000000% 0.00 0.00 0.000000000 1.88000000% 0.000000000 86359BQW4 1-A1B 29,407,000.00 24,936,596.37 1,293,756.44 0.00 23,642,839.93 39,067.33 1000.000000000 0.000000000 0.000000000 1000.000000000 2.700000000 3.240000000% 0.00 0.00 0.000000000 3.24000000% 0.000000000 86359BQY0 1-A2A 20,904,500.00 20,904,500.00 0.00 0.00 20,904,500.00 56,442.15 1000.000000000 0.000000000 0.000000000 1000.000000000 2.641666627 3.170000000% 0.00 0.00 0.000000000 3.17000000% 0.000000000 86359BQZ7 1-A2B 20,904,500.00 20,904,500.00 0.00 0.00 20,904,500.00 55,222.72 1000.000000000 0.000000000 0.000000000 1000.000000000 4.708333500 5.650000000% 0.00 0.00 0.000000000 5.65000000% 0.000000000 86359BQX2 1-A3A 20,000,000.00 20,000,000.00 0.00 0.00 20,000,000.00 94,166.67 1000.000000000 0.000000000 0.000000000 1000.000000000 3.616666486 4.340000000% 0.00 0.00 0.000000000 4.34000000% 0.000000000 86359BRA1 1-A3B 18,413,000.00 18,413,000.00 0.00 0.00 18,413,000.00 66,593.68 1000.000000000 0.000000000 0.000000000 1000.000000000 4.633333443 5.560000000% 0.00 0.00 0.000000000 5.56000000% 0.000000000 86359BRB9 1-A4A 30,500,000.00 30,500,000.00 0.00 0.00 30,500,000.00 141,316.67 1000.000000000 0.000000000 0.000000000 1000.000000000 4.558333124 5.470000000% 0.00 0.00 0.000000000 5.47000000% 0.000000000 86359BRH6 1-A4B 15,946,000.00 15,946,000.00 0.00 0.00 15,946,000.00 72,687.18 1000.000000000 0.000000000 0.000000000 1000.000000000 4.583333333 5.500000000% 0.00 0.00 0.000000000 5.50000000% 0.000000000 86359BRJ2 1-A4C 7,500,000.00 7,500,000.00 0.00 0.00 7,500,000.00 34,375.00 1000.000000000 0.000000000 0.000000000 1000.000000000 4.508333000 5.410000000% 0.00 0.00 0.000000000 5.41000000% 0.000000000 86359BRK9 1-A4D 10,000,000.00 10,000,000.00 0.00 0.00 10,000,000.00 45,083.33 1000.000000000 0.000000000 0.000000000 1000.000000000 4.683333219 5.620000000% 0.00 0.00 0.000000000 5.62000000% 0.000000000 86359BRC7 1-A5 29,149,000.00 29,149,000.00 0.00 0.00 29,149,000.00 136,514.48 1000.000000000 0.000000000 0.000000000 1000.000000000 4.200000000 5.040000000% 0.00 0.00 0.000000000 5.04000000% 0.000000000 86359BRD5 1-A6 34,288,000.00 34,288,000.00 0.00 0.00 34,288,000.00 144,009.60 940.146820391 4.976698134 0.000000000 935.170122258 3.525550569 4.500000000% 0.00 0.00 0.000000000 4.50000000% 0.000000000 86359BRE3 2-A1 109,850,000.00 103,275,128.22 546,690.29 0.00 102,728,437.93 387,281.73 1000.000000000 0.000000000 0.000000000 1000.000000000 4.691666333 5.630000000% 0.00 0.00 0.000000000 5.63000000% 0.000000000 86359BRF0 1-M1 10,004,000.00 10,004,000.00 0.00 0.00 10,004,000.00 46,935.43 1000.000000000 0.000000000 0.000000000 1000.000000000 5.000000000 6.000000000% 0.00 0.00 0.000000000 6.00000000% 0.000000000 86359BRG8 1-M2 7,276,000.00 7,276,000.00 0.00 0.00 7,276,000.00 36,380.00 1000.000000000 0.000000000 0.000000000 1000.000000000 4.166666667 5.000000000% 0.00 0.00 0.000000000 5.00000000% 0.000000000 86359BRP8 2-M1 2,301,000.00 2,301,000.00 0.00 0.00 2,301,000.00 9,587.50 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 2 of 23 Notes: (1) N denotes notional balance not included in total (2) Accrued Interest Plus/Minus Interest Adjustment Minus Deferred Interest equals Interest Payment (3) Estimated. * Denotes Controlling Class Class CUSIP Original Opening Principal Principal Negative Closing Interest Interest Pass-Through Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Next Rate(3) WAC:WAMM:Current Index:Next Index: Payment Date:Prior Payment:Next Payment:Record Date: 6.527747% 1.450000%1.615000% 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Structured Asset Securities Corporation Mortgage Pass-Through Certificates Series 2004-9XS Face Value (1) Balance Payment Adj. or Loss Amortization Balance Payment (2) Adjustment Rate 353 REMIC 3 Statement Date: ABN AMRO Acct: 721781.2 1000.000000000 0.000000000 0.000000000 1000.000000000 4.375002899 5.250000000% 0.00 0.00 0.000000000 5.25000000% 0.000000000 86359BRQ6 2-M2 1,725,000.00 1,725,000.00 0.00 0.00 1,725,000.00 7,546.88 1000.000000000 0.000000000 0.000000000 1000.000000000 4.375000000 0.00 0.00 0.000000000 5.25000000% 0.000000000 86359BRR4 M3 4,790,000.00 4,790,000.00 0.00 0.00 4,790,000.00 20,956.25 1000.000000000 0.000000000 0.000000000 1000.000000000 500996.200000000 0.00 50,099.62 500996.200000000 N/A 0.000000000 9ABSQ599 P 100.00 100.00 0.00 0.00 100.00 50,099.62 946.773830476 0.000000000 0.000000000 933.249686905 1.738546717 0.00 ) (22,246.09 ) (0.046459944 2.26242839% 0.000000000 N 9ABSQ600 X 478,823,003.19 453,337,088.85 0.00 0.00 446,861,417.81 832,456.16 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.00 0.00 0.000000000 N/A 0.000000000 9ABSQ601 R 0.00 0.00 0.00 0.00 0.00 0.00 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.00 0.00 0.000000000 N/A 0.000000000 LT1-R 0.00 0.00 0.00 0.00 0.00 0.00 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.00 0.00 0.000000000 N/A 0.000000000 LT2-R 0.00 0.00 0.00 0.00 0.00 0.00 Total P&I Payment 0.00 27,853.53 478,822,100.00 451,683,553.94 8,891,341.46 Total 445,185,636.81 6,497,917.13 0.00 2,393,424.33 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 3 of 23 Notes: (1) N denotes notional balance not included in total (2) Accrued Interest Plus/Minus Interest Adjustment Minus Deferred Interest equals Interest Payment (3) Estimated. * Denotes Controlling Class Class CUSIP Original Opening Principal Principal Negative Closing Interest Interest Pass-Through Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Per $ 1000 Next Rate(3) Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Structured Asset Securities Corporation Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Face Value (1) Balance Payment Adj. or Loss Amortization Balance Payment (2) Adjustment Rate Statement Date: Component Detail 1000.000000000 0.000000000 0.000000000 1000.000000000 4.375001375 0.00 0.00 0.000000000 5.25000000% 0.000000000 M3(1) 3,637,000.00 3,637,000.00 0.00 0.00 3,637,000.00 15,911.88 1000.000000000 0.000000000 0.000000000 1000.000000000 4.375004337 0.00 0.00 0.000000000 5.25000000% 0.000000000 M3(2) 1,153,000.00 1,153,000.00 0.00 0.00 1,153,000.00 5,044.38 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 4 of 23 Notes: (1) N denotes notional balance not included in total (2) Accrued Interest Plus/Minus Interest Adjustment Minus Deferred Interest equals Interest Payment (3) Estimated. * Denotes Controlling Class Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Statement Date: Cash Reconciliation Summary Current Scheduled Interest Interest Summary Less Deferred Interest Plus Gross Advance Interest Less PPIS Reducing Scheduled Int 641,510.86 0.000.00 Less ASER Interest Adv Reduction 0.00 Less Other Adjustment 0.00 Total 2,396,780.20 Unscheduled Interest:Prepayment Penalties 50,099.62 Yield Maintenance Penalties 0.00 Other Interest Proceeds 0.00 Total 50,099.62 Less Fees & Expenses Paid By/To Servicer Less Fee Paid To Servicer Less Fee Strips Paid by Servicer Special Servicing Fees Interest Due Serv on Advances Recoup of Prior Advances Misc. Fees & Expenses Total Unscheduled Fees & ExpensesTotal Interest Due Trust Less Fees & Expenses Paid By/To TrustTrustee FeeFee StripsMisc. FeesInterest Reserve Withholding Plus Interest Reserve DepositTotal Total Interest Due Certs Principal Summary Scheduled Principal:Current Scheduled PrincipalAdvanced Scheduled PrincipalScheduled PrincipalUnscheduled Principal:CurtailmentsPrepayments in FullLiquidation ProceedsRepurchase ProceedsOther Principal ProceedsTotal Unscheduled Principal Remittance Principal Remittance P&I Due Trust Remittance P&I Due Certs Pool Balance Summary Beginning PoolScheduled PrincipalUnscheduled PrincipalDeferred InterestLiquidationsRepurchases Ending Pool Balance Count Principal Interest Prior OutstandingPlus Current PeriodLess Recovered Ending Outstanding Servicing Fee Summary Current Servicing FeesPlus Fees Advanced for PPISLess Reduction for PPISPlus Delinquent Servicing Fees Total Servicing Fees Overcollateralization Summary PPIS Summary Gross PPISReduced by PPIEReduced by Shortfalls in FeesReduced by Other Amounts PPIS Reducing ScheduledInterest PPIS Reducing Servicing FeePPIS Due Certificate 0.00 0.00 0.000.00 0.00 0.00 2,421,664.44 0.000.000.000.00 0.00 75,437.55 227,946.85303,384.40 62,571.30 6,109,715.34 0.000.000.00 6,172,286.646,475,671.04 8,897,335.48 8,897,335.48 453,337,088.85 1,896 303,384.40 6,172,286.64 28 0.000.00 0 0.00 0 446,861,417.81 1,868 247,713.54 1,952,393.71 227,946.85 1,755,269.34 240,415.04 1,879,816.11 25,215.38 0.000.00 69,278.17 94,493.54 0.000.000.000.000.000.00 0.00 Advance Summary (Advance Made by Servicer) ) (25,215.38 2,421,664.44 Interest Not Advanced ( Current Period ) 0.00 1,755,269.34 Workout FeesLiquidation Fees 0.000.00 Less Non Recovered ) (1,827,846.94 ) (235,245.35 0.00 0.00 0.00 Overcollateralization Amount Overcollateralization Deficiency 1,675,881.00 0.00 Other Principal Information Principal Remittance Amount Overcollateralization Release Amount 6,475,671.04 0.00 6,475,671.04 Principal Distribution Amount Page 5 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Statement Date: Cash Reconciliation Summary Pool 1 Current Scheduled Interest Interest Summary Less Deferred Interest Plus Gross Advance Interest Less PPIS Reducing Scheduled Int 448,471.38 0.000.00 Less ASER Interest Adv Reduction 0.00 Less Other Adjustment 0.00 Total 1,877,355.22 Unscheduled Interest:Prepayment Penalties 39,459.71 Yield Maintenance Penalties 0.00 Other Interest Proceeds 0.00 Total 39,459.71 Less Fees & Expenses Paid By/To Servicer Less Fee Paid To Servicer Less Fee Strips Paid by Servicer Special Servicing Fees Interest Due Serv on Advances Recoup of Prior Advances Misc. Fees & Expenses Total Unscheduled Fees & ExpensesTotal Interest Due Trust Less Fees & Expenses Paid By/To TrustTrustee FeeFee StripsMisc. FeesInterest Reserve Withholding Plus Interest Reserve DepositTotal Total Interest Due Certs Principal Summary Scheduled Principal:Current Scheduled PrincipalAdvanced Scheduled PrincipalScheduled PrincipalUnscheduled Principal:CurtailmentsPrepayments in FullLiquidation ProceedsRepurchase ProceedsOther Principal ProceedsTotal Unscheduled Principal Remittance Principal Remittance P&I Due Trust Remittance P&I Due Certs Pool Balance Summary Beginning PoolScheduled PrincipalUnscheduled PrincipalDeferred InterestLiquidationsRepurchases Ending Pool Balance Count Principal Interest Prior OutstandingPlus Current PeriodLess Recovered Ending Outstanding Servicing Fee Summary Current Servicing FeesPlus Fees Advanced for PPISLess Reduction for PPISPlus Delinquent Servicing Fees Total Servicing Fees Overcollateralization Summary PPIS Summary Gross PPISReduced by PPIEReduced by Shortfalls in FeesReduced by Other Amounts PPIS Reducing ScheduledInterest PPIS Reducing Servicing FeePPIS Due Certificate 0.00 0.00 0.000.00 0.00 0.00 1,899,852.08 0.000.000.000.00 0.00 49,560.12 181,159.70230,719.82 49,936.66 5,670,570.36 0.000.000.00 5,720,507.025,951,226.84 7,851,078.92 7,851,078.92 344,502,602.72 1,698 230,719.82 5,720,507.02 27 0.000.00 0 0.00 0 338,551,375.88 1,671 200,683.43 1,611,030.41 181,159.70 1,428,883.84 192,537.59 1,548,346.92 16,962.85 0.000.00 54,856.85 71,819.69 0.000.000.000.000.000.00 0.00 Advance Summary (Advance Made by Servicer) ) (16,962.85 1,899,852.08 Interest Not Advanced ( Current Period ) 0.00 1,428,883.84 Workout FeesLiquidation Fees 0.000.00 Less Non Recovered ) (1,491,567.33 ) (189,305.54 0.00 0.00 0.00 Overcollateralization Amount Overcollateralization Deficiency 1,273,277.00 0.00 Other Principal Information Principal Remittance Amount Overcollateralization Release Amount 5,951,226.84 0.00 5,951,226.84 Principal Distribution Amount Page 6 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Statement Date: Cash Reconciliation Summary Pool 2 Current Scheduled Interest Interest Summary Less Deferred Interest Plus Gross Advance Interest Less PPIS Reducing Scheduled Int 193,039.48 0.000.00 Less ASER Interest Adv Reduction 0.00 Less Other Adjustment 0.00 Total 519,424.98 Unscheduled Interest:Prepayment Penalties 10,639.91 Yield Maintenance Penalties 0.00 Other Interest Proceeds 0.00 Total 10,639.91 Less Fees & Expenses Paid By/To Servicer Less Fee Paid To Servicer Less Fee Strips Paid by Servicer Special Servicing Fees Interest Due Serv on Advances Recoup of Prior Advances Misc. Fees & Expenses Total Unscheduled Fees & ExpensesTotal Interest Due Trust Less Fees & Expenses Paid By/To TrustTrustee FeeFee StripsMisc. FeesInterest Reserve Withholding Plus Interest Reserve DepositTotal Total Interest Due Certs Principal Summary Scheduled Principal:Current Scheduled PrincipalAdvanced Scheduled PrincipalScheduled PrincipalUnscheduled Principal:CurtailmentsPrepayments in FullLiquidation ProceedsRepurchase ProceedsOther Principal ProceedsTotal Unscheduled Principal Remittance Principal Remittance P&I Due Trust Remittance P&I Due Certs Pool Balance Summary Beginning PoolScheduled PrincipalUnscheduled PrincipalDeferred InterestLiquidationsRepurchases Ending Pool Balance Count Principal Interest Prior OutstandingPlus Current PeriodLess Recovered Ending Outstanding Servicing Fee Summary Current Servicing FeesPlus Fees Advanced for PPISLess Reduction for PPISPlus Delinquent Servicing Fees Total Servicing Fees Overcollateralization Summary PPIS Summary Gross PPISReduced by PPIEReduced by Shortfalls in FeesReduced by Other Amounts PPIS Reducing ScheduledInterest PPIS Reducing Servicing FeePPIS Due Certificate 0.00 0.00 0.000.00 0.00 0.00 521,812.36 0.000.000.000.00 0.00 25,877.4346,787.1572,664.58 12,634.64 439,144.98 0.000.000.00 451,779.62524,444.20 1,046,256.56 1,046,256.56 108,834,486.13 198 72,664.58 451,779.62 1 0.000.00 0 0.00 0 108,310,041.93 197 47,030.11 341,363.29 46,787.15 326,385.50 47,877.45 331,469.19 8,252.53 0.000.00 14,421.32 22,673.85 0.000.000.000.000.000.00 0.00 Advance Summary (Advance Made by Servicer) ) (8,252.53 521,812.36 Interest Not Advanced ( Current Period ) 0.00 326,385.50 Workout FeesLiquidation Fees 0.000.00 Less Non Recovered ) (336,279.61 ) (45,939.81 0.00 0.00 0.00 Overcollateralization Amount Overcollateralization Deficiency 402,604.00 0.00 Other Principal Information Principal Remittance Amount Overcollateralization Release Amount 524,444.20 0.00 524,444.20 Principal Distribution Amount Page 7 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Class Accrued Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Bond Interest Reconciliation Prior Other Additions Interest Losses Current Cumulative Accrual Risk Carry- Fwd Amt Interest Interest Payment Amount Interest Certificate Interest Losses Shortfall Int. Carry- Proceeds Risk Carry- Certificate Agreement Amt Deposited From YM Method Days Basis Remaining Statement Date: Distributable Prior Applied Realized Remaining Int. Carry- forward Amt Principal Principal Extra Prepayments Shortfalls Net Cap RateY/N 0.00 0.00 1-A1A 30 116,701.95 0.00 116,701.95 116,701.95 Act/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A1B 30 39,067.33 0.00 39,067.33 39,067.33 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A2A 30 56,442.15 0.00 56,442.15 56,442.15 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A2B 30 55,222.72 0.00 55,222.72 55,222.72 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A3A 30 94,166.67 0.00 94,166.67 94,166.67 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A3B 30 66,593.68 0.00 66,593.68 66,593.68 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A4A 30 141,316.67 0.00 141,316.67 141,316.67 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A4B 30 72,687.18 0.00 72,687.18 72,687.18 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A4C 30 34,375.00 0.00 34,375.00 34,375.00 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A4D 30 45,083.33 0.00 45,083.33 45,083.33 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A5 30 136,514.48 0.00 136,514.48 136,514.48 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-A6 30 144,009.60 0.00 144,009.60 144,009.60 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 2-A1 30 387,281.73 0.00 387,281.73 387,281.73 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-M1 30 46,935.43 0.00 46,935.43 46,935.43 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 1-M2 30 36,380.00 0.00 36,380.00 36,380.00 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 2-M1 30 9,587.50 0.00 9,587.50 9,587.50 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 2-M2 30 7,546.88 0.00 7,546.88 7,546.88 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 M3 30 20,956.25 0.00 20,956.25 20,956.25 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 P 30 0.00 0.00 50,099.62 50,099.62 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 X 30 854,702.25 1,652,631.72 2,507,333.97 832,456.16 30/360 0.00 0.00 0.00 0.00 N 0.00 0.00 1,674,877.81 0.00 0.00 0.00 1,652,631.72 2,365,570.80 4,068,302.14 2,393,424.33 0.00 0.00 0.00 0.00 0.00 0.00 1,674,877.81 0.00 (2) Principal Prepayments include the Extra Principal Amount 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 8 of 23 (1) Other Interest Proceeds are additional interest amounts specifically allocated to the bond(s) and used in determining the bonds Distributable Interest. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Interest Adjustments Summary Statement Date: 0.00 0.00 0.00 0.00 Special Servicing Fees Workout Fees Liquidation Fees Legal Fees 0.00 0.00 Misc. Fees & Expenses Paid by/to Servicer Interest Paid to Servicer on Outstanding Advances 0.00 0.00 ASER Interest Advance Reduction Interest Not Advanced (Current Period) Recoup of Prior Advances by Servicer 0.00 0.00 Servicing Fees Paid Servicer on Loans Not Advanced Misc. Fees & Expenses Paid by Trust 0.00 0.00 0.00 Shortfall Due to Rate Modification Total Shortfall Allocated to the Bonds Total Interest Adjustment to the Bonds 0.00 Shortfall Allocated to the Bonds: Excess Allocated to the Bonds: Other Interest Proceeds Due the Bonds Yield Maintenance Penalties Due the Bonds Prepayment Penalties Due the Bonds Recovered ASER Interest Due the Bonds Recovered Interest Due the Bonds Less Total Shortfall Allocated to the Bonds Total Excess Allocated to the Bonds 50,099.62 50,099.62 Total Excess Allocated to the Bonds 50,099.62 0.00 Aggregate Interest Adjustment Allocated to the Bonds 0.00 50,099.62 0.00 0.00 Prepayment Interest Excess Due the Bonds 0.00 ARD Excess Interest 0.00 Other Interest Loss 0.00 0.00 Net Prepayment Int. Shortfalls Allocated to the Bonds Page 9 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Other Related Information Statement Date: $5,994.01 Insurance Premium...................................................................................................................... Insured Payments to Class: I-A2B............................................................................................................................ I-A3B............................................................................................................................... I-A5................................................................................................................................... I-A6.................................................................................................................................. 0.00 0.00 0.00 0.00 Page 10 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part I Distribution Date REO # Balance Statement Date: Foreclosure Delinq 3+ Months Delinq 2 Months Delinq 1 Month Current # Balance # Balance # Balance # Balance # Balance Delinquency Aging Categories 2.25% 2.46% 0.70% 0.56% 5 0.27% 1,703,511 0.38% 0.16% 0.06% 0.00% 0.00% 25-Aug-04 42 10,973,440 13 2,484,623 3 285,289 0 0 1,805 431,414,556 96.63% 96.54% 2.37% 1.74% 0.58% 0.65% 1 0.05% 116,608 0.03% 0.00% 0.00% 0.00% 0.00% 26-Jul-04 45 7,901,946 11 2,947,840 0 0 0 0 1,839 442,370,694 96.99% 97.58% 2.55% 2.12% 0.21% 0.19% 1 0.05% 116,675 0.03% 0.00% 0.00% 0.00% 0.00% 25-Jun-04 49 9,746,807 4 866,177 0 0 0 0 1,871 448,918,894 97.19% 97.67% 0.20% 0.21% 0.00% 0.00% 0 0.00% 0 0.00% 0.00% 0.00% 0.00% 0.00% 25-May-04 4 1,002,935 0 0 0 0 0 0 1,953 467,017,019 99.80% 99.79% Page 11 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part I Distribution Date REO # Balance Statement Date: Foreclosure Delinq 3+ Months Delinq 2 Months Delinq 1 Month Current # Balance # Balance # Balance # Balance # Balance Delinquency Aging Categories Pool 1 2.45% 3.13% 0.72% 0.63% 5 0.30% 1,703,511 0.50% 0.18% 0.08% 0.00% 0.00% 25-Aug-04 41 10,612,924 12 2,135,841 3 285,289 0 0 1,610 323,813,812 96.35% 95.65% 2.59% 2.19% 0.65% 0.86% 1 0.06% 116,608 0.03% 0.00% 0.00% 0.00% 0.00% 26-Jul-04 44 7,552,817 11 2,947,840 0 0 0 0 1,642 333,885,337 96.70% 96.92% 2.84% 2.78% 0.23% 0.25% 1 0.06% 116,675 0.03% 0.00% 0.00% 0.00% 0.00% 25-Jun-04 49 9,746,807 4 866,177 0 0 0 0 1,673 339,998,565 96.87% 96.94% 0.23% 0.28% 0.00% 0.00% 0 0.00% 0 0.00% 0.00% 0.00% 0.00% 0.00% 25-May-04 4 1,002,935 0 0 0 0 0 0 1,755 357,063,190 99.77% 99.72% Page 12 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part I Distribution Date REO # Balance Statement Date: Foreclosure Delinq 3+ Months Delinq 2 Months Delinq 1 Month Current # Balance # Balance # Balance # Balance # Balance Delinquency Aging Categories Pool 2 0.51% 0.33% 0.51% 0.32% 0 0.00% 0 0.00% 0.00% 0.00% 0.00% 0.00% 25-Aug-04 1 360,516 1 348,783 0 0 0 0 195 107,600,743 98.98% 99.35% 0.51% 0.32% 0.00% 0.00% 0 0.00% 0 0.00% 0.00% 0.00% 0.00% 0.00% 26-Jul-04 1 349,129 0 0 0 0 0 0 197 108,485,358 99.49% 99.68% 0.00% 0.00% 0.00% 0.00% 0 0.00% 0 0.00% 0.00% 0.00% 0.00% 0.00% 25-Jun-04 0 0 0 0 0 0 0 0 198 108,920,329 100.00% 100.00% 0.00% 0.00% 0.00% 0.00% 0 0.00% 0 0.00% 0.00% 0.00% 0.00% 0.00% 25-May-04 0 0 0 0 0 0 0 0 198 109,953,829 100.00% 100.00% Page 13 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Distribution Date Statement Date: Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance In Foreclosure and Delinquent In Bankruptcy and Delinquent In REO and Delinquent Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part II 25-Aug-04 0 0 0 0 0 0 0 0 3 285,289 0 0 0.00% 0.00% 0.00% 0.00% 0.16% 0.06% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.11% 0.04% 0 0 2 170,383 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 26-Jul-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 25-Jun-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 25-May-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 Page 14 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Distribution Date Statement Date: Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance In Foreclosure and Delinquent In Bankruptcy and Delinquent In REO and Delinquent Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part II - Pool 1 25-Aug-04 0 0 0 0 0 0 0 0 3 285,289 0 0 0.00% 0.00% 0.00% 0.00% 0.18% 0.08% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.12% 0.05% 0 0 2 170,383 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 26-Jul-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 25-Jun-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 25-May-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 Page 15 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Distribution Date Statement Date: Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance Current 31 - 60 Days 61 - 90 Days 90 + Days # Balance # Balance # Balance # Balance In Foreclosure and Delinquent In Bankruptcy and Delinquent In REO and Delinquent Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part II - Pool 2 25-Aug-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 26-Jul-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 25-Jun-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 25-May-04 0 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 0 0 0 0 0 0 0 0 0 0 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0 Page 16 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Asset-Backed Facts ~ 15 Month Historical Payoff/Loss Summary Distribution Date Ending Pool (1) Payoffs(2) Realized Losses (2) Remaining Term Curr Weighted Avg. # Balance # Balance # Amount Life Coupon Remit Statement Date: Ending Arrearage (1) Balance Insurance Substitution Liquidation Proceeds Proceeds Proceeds 25-Aug-04 1,868 94.06% 446,861,418 93.32% 1.48% 1.35% 0 0.00% 0 0.00% 353 6.53% 6.28% 28 6,109,715 0.00 0.00 0.00 0.00 26-Jul-04 1,896 95.47% 453,337,089 94.68% 1.51% 1.27% 0 0.00% 0 0.00% 354 6.53% 6.28% 29 5,841,628 0.00 0.00 0.00 0.00 25-Jun-04 1,925 96.93% 459,648,554 96.00% 0.05% 0.01% 0 0.00% 0 0.00% 355 6.54% 6.29% 1 28,768 0.00 0.00 0.00 0.00 25-May-04 1,957 98.54% 468,019,954 97.74% 1.46% 2.19% 0 0.00% 0 0.00% 356 6.54% 6.29% 29 10,470,952 0.00 0.00 0.00 0.00 (1) Percentage based on pool as of cutoff. (2) Percentage based on pool as of beginning of period. Page 17 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Asset-Backed Facts ~ 15 Month Historical Payoff/Loss Summary Distribution Date Ending Pool (1) Payoffs(2) Realized Losses (2) Remaining Term Curr Weighted Avg. # Balance # Balance # Amount Life Coupon Remit Statement Date: Ending Arrearage (1) Balance Insurance Substitution Liquidation Proceeds Proceeds Proceeds Pool 1 25-Aug-04 1,641 82.63% 332,756,160 69.49% 1.56% 1.52% 0 0.00% 0 0.00% 353 6.72% 6.47% 26 5,144,038 0.00 0.00 0.00 0.00 26-Jul-04 1,667 83.94% 338,176,370 70.63% 1.71% 1.70% 0 0.00% 0 0.00% 354 6.73% 6.48% 29 5,841,628 0.00 0.00 0.00 0.00 25-Jun-04 1,696 85.40% 344,397,046 71.93% 0.06% 0.01% 0 0.00% 0 0.00% 355 6.73% 6.48% 1 28,768 0.00 0.00 0.00 0.00 25-May-04 1,727 86.96% 351,482,595 73.41% 1.43% 1.53% 0 0.00% 0 0.00% 356 6.73% 6.48% 25 5,465,951 0.00 0.00 0.00 0.00 (1) Percentage based on pool as of cutoff. (2) Percentage based on pool as of beginning of period. Page 18 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Asset-Backed Facts ~ 15 Month Historical Payoff/Loss Summary Distribution Date Ending Pool (1) Payoffs(2) Realized Losses (2) Remaining Term Curr Weighted Avg. # Balance # Balance # Amount Life Coupon Remit Statement Date: Ending Arrearage (1) Balance Insurance Substitution Liquidation Proceeds Proceeds Proceeds Pool 2 25-Aug-04 197 9.92% 108,310,042 22.62% 0.51% 0.40% 0 0.00% 0 0.00% 352 5.89% 5.64% 1 439,145 0.00 0.00 0.00 0.00 26-Jul-04 198 9.97% 108,834,486 22.73% 0.00% 0.00% 0 0.00% 0 0.00% 355 5.89% 5.64% 0 0 0.00 0.00 0.00 0.00 25-Jun-04 198 9.97% 108,920,329 22.75% 0.00% 0.00% 0 0.00% 0 0.00% 354 5.89% 5.64% 0 0 0.00 0.00 0.00 0.00 25-May-04 198 9.97% 109,953,829 22.96% 1.98% 4.35% 0 0.00% 0 0.00% 358 5.90% 5.65% 4 5,005,001 0.00 0.00 0.00 0.00 (1) Percentage based on pool as of cutoff. (2) Percentage based on pool as of beginning of period. Page 19 of 23 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Realized Loss Detail Period Disclosure Control # Appraisal Date Appraisal Value BeginningScheduled Balance Gross Proceeds Gross Proceeds as a % of Sched. Balance Aggregate Liquidation Expenses * Net Liquidation Proceeds Net Proceeds as a % of Sched. Balance Realized Loss Statement Date: Current TotalCumulative 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 20 of 23 * Aggregate liquidation expenses also include outstanding P&I advances and unpaid servicing fees, unpaid trustee fees, etc.. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Realized Loss Detail Period Disclosure Control # Appraisal Date Appraisal Value BeginningScheduled Balance Gross Proceeds Gross Proceeds as a % of Sched. Balance Aggregate Liquidation Expenses * Net Liquidation Proceeds Net Proceeds as a % of Sched. Balance Realized Loss Statement Date: Pool 1 Current TotalCumulative 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 21 of 23 * Aggregate liquidation expenses also include outstanding P&I advances and unpaid servicing fees, unpaid trustee fees, etc.. Structured Asset Securities Corporation Payment Date:Prior Payment:Next Payment:Record Date: 25-Aug-0425-Aug-04 26-Jul-04 27-Sep-04 24-Aug-04 Mortgage Pass-Through Certificates Series 2004-9XS ABN AMRO Acct: 721781.2 Realized Loss Detail Period Disclosure Control # Appraisal Date Appraisal Value BeginningScheduled Balance Gross Proceeds Gross Proceeds as a % of Sched. Balance Aggregate Liquidation Expenses * Net Liquidation Proceeds Net Proceeds as a % of Sched. Balance Realized Loss Statement Date: Pool 2 Current TotalCumulative 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 22 of 23 * Aggregate liquidation expenses also include outstanding P&I advances and unpaid servicing fees, unpaid trustee fees, etc.. Structured Asset Securities Corporation Substitution Detail History ABN AMRO Acct: 721781.2 Series 2004-9XS Mortgage Pass-Through Certificates 24-Aug-04 27-Sep-04 26-Jul-04 25-Aug-04 25-Aug-04 Record Date: Next Payment: Prior Payment: Payment Date: Statement Date: Property ID Deleted Loan Qualified Substitute Scheduled Prin Bal 23-Aug-2004 - 14:06 () (c) 2004 LaSalle Bank N.A. Page 23 of 23 Original Property Per Section 7.01(a)(i) of the Property Management and Lease Servicing Agreement, aggregate Appraised Value of the Qualified Substitute Mortgaged Properties acquired by theIssuer since the Closing Date in connection with the substitution or exchange pursuant to Section 7.01 is not to exceed 25% of the aggregate Initial Appraised Value of theMortgaged Properties. (A)

Structured Asset Securities Corporation

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Reporting Package Table of Contents

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Administrator:

Christopher Lewis 312.904.7992
christopher.lewis@abnamro.com

Analyst:

Dinsmore Sohn 714.259.6258
dinsmore.sohn@abnamro.com

Statement Date:

135 S. LaSalle Street, Suite 1625
Chicago, IL 60603
USA

Statements to Certificateholders
Component Detail Report
Cash Reconciliation Summary
Bond Interest Reconciliation

Shortfall Summary Report

Other Related Information
Asset-Backed Facts ~ 15 Month Loan Status Summary Part I

Asset-Backed Facts ~ 15 Month Loan Status Summary Part II
Asset-Backed Facts ~ 15 Month Loan Payoff/Loss Summary
Realized Loss Detail

Page 2-3
Page 4
Page 5-7
Page 8

Page 9

Page 10
Page 11-13

Page 14-16
Page 17-19

Page 20-22

Substitution Detail History

Page 23

Page(s)

Information is available for this issue from the following sources

Issue Id:

Monthly Data File
Name:

SASC49XS

SASC49XS_200409_3.ZIP

Closing Date:

First Payment Date:

Rated Final Payment: Date:

30-Apr-04
25-May-04

25-May-34

Parties to The Transaction

Depositor: Structured Asset Securities Corporation

Underwriter: Lehman Brothers Inc.

Master Servicer: Aurora Loan Services, Inc.

Rating Agency: Standard & Poor's/Moody's Investors Service, Inc.

800.246.5761

LaSalle Factor Line

LaSalle Web Site

Servicer Web Site

www.alservices.com

www.etrustee.net

Page 1 of 23

Class

CUSIP

Original

Opening

Principal

Negative

Closing

Interest

Pass-Through

Per $ 1000

Next Rate(3)

WAC:
WAMM:
Current Index:
Next Index:

Payment Date:
Prior Payment:
Next Payment:
Record Date:

6.523073%

1.615000%
1.840000%

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Structured Asset Securities Corporation

Mortgage Pass-Through Certificates

Series 2004-9XS

Face Value (1)

Balance

Payment

Adj. or Loss

Amortization

Balance

Payment (2)

Adjustment

Rate

352

REMIC 3

Statement Date:

ABN AMRO Acct: 721781.2

803.986803351

72.431775580

0.000000000

731.555027771

1.271304126

1.950000000%

0.00

0.000000000

1.72500000%

0.000000000

86359BQV6

1-A1A

105,864,000.00

85,113,258.95

7,667,917.49

0.00

77,445,341.46

134,585.34

803.986803482

72.431775428

0.000000000

731.555028055

1.259579352

1.880000000%

0.00

0.000000000

1.88000000%

0.000000000

86359BQW4

1-A1B

29,407,000.00

23,642,839.93

2,130,001.22

0.00

21,512,838.71

37,040.45

1000.000000000

0.000000000

1000.000000000

2.700000000

3.240000000%

0.00

0.000000000

3.24000000%

0.000000000

86359BQY0

1-A2A

20,904,500.00

0.00

20,904,500.00

56,442.15

1000.000000000

0.000000000

1000.000000000

2.641666627

3.170000000%

0.00

0.000000000

3.17000000%

0.000000000

86359BQZ7

1-A2B

20,904,500.00

0.00

20,904,500.00

55,222.72

1000.000000000

0.000000000

1000.000000000

4.708333500

5.650000000%

0.00

0.000000000

5.65000000%

0.000000000

86359BQX2

1-A3A

20,000,000.00

0.00

20,000,000.00

94,166.67

1000.000000000

0.000000000

1000.000000000

3.616666486

4.340000000%

0.00

0.000000000

4.34000000%

0.000000000

86359BRA1

1-A3B

18,413,000.00

0.00

18,413,000.00

66,593.68

1000.000000000

0.000000000

1000.000000000

4.633333443

5.560000000%

0.00

0.000000000

5.56000000%

0.000000000

86359BRB9

1-A4A

30,500,000.00

0.00

30,500,000.00

141,316.67

1000.000000000

0.000000000

1000.000000000

4.558333124

5.470000000%

0.00

0.000000000

5.47000000%

0.000000000

86359BRH6

1-A4B

15,946,000.00

0.00

15,946,000.00

72,687.18

1000.000000000

0.000000000

1000.000000000

4.583333333

5.500000000%

0.00

0.000000000

5.50000000%

0.000000000

86359BRJ2

1-A4C

7,500,000.00

0.00

7,500,000.00

34,375.00

1000.000000000

0.000000000

1000.000000000

4.508333000

5.410000000%

0.00

0.000000000

5.41000000%

0.000000000

86359BRK9

1-A4D

10,000,000.00

0.00

10,000,000.00

45,083.33

1000.000000000

0.000000000

1000.000000000

4.683333219

5.620000000%

0.00

0.000000000

5.62000000%

0.000000000

86359BRC7

1-A5

29,149,000.00

0.00

29,149,000.00

136,514.48

1000.000000000

0.000000000

1000.000000000

4.200000000

5.040000000%

0.00

0.000000000

5.04000000%

0.000000000

86359BRD5

1-A6

34,288,000.00

0.00

34,288,000.00

144,009.60

935.170122258

11.083810287

0.000000000

924.086311971

3.506887938

4.500000000%

0.00

0.000000000

4.50000000%

0.000000000

86359BRE3

2-A1

109,850,000.00

102,728,437.93

1,217,556.56

0.00

101,510,881.37

385,231.64

1000.000000000

0.000000000

1000.000000000

4.691666333

5.630000000%

0.00

0.000000000

5.63000000%

0.000000000

86359BRF0

1-M1

10,004,000.00

0.00

10,004,000.00

46,935.43

1000.000000000

0.000000000

1000.000000000

5.000000000

6.000000000%

0.00

0.000000000

6.00000000%

0.000000000

86359BRG8

1-M2

7,276,000.00

0.00

7,276,000.00

36,380.00

1000.000000000

0.000000000

1000.000000000

4.166666667

5.000000000%

0.00

0.000000000

5.00000000%

0.000000000

86359BRP8

2-M1

2,301,000.00

0.00

2,301,000.00

9,587.50

Page 2 of 23

Notes: (1) N denotes notional balance not included in total (2) Accrued Interest Plus/Minus Interest Adjustment Minus Deferred Interest equals Interest Payment (3) Estimated. * Denotes Controlling Class

Class

CUSIP

Original

Opening

Principal

Negative

Closing

Interest

Pass-Through

Per $ 1000

Next Rate(3)

WAC:
WAMM:
Current Index:
Next Index:

Payment Date:
Prior Payment:
Next Payment:
Record Date:

6.523073%

1.615000%
1.840000%

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Structured Asset Securities Corporation

Mortgage Pass-Through Certificates

Series 2004-9XS

Face Value (1)

Balance

Payment

Adj. or Loss

Amortization

Balance

Payment (2)

Adjustment

Rate

352

REMIC 3

Statement Date:

ABN AMRO Acct: 721781.2

1000.000000000

0.000000000

1000.000000000

4.375002899

5.250000000%

0.00

0.000000000

5.25000000%

0.000000000

86359BRQ6

2-M2

1,725,000.00

0.00

1,725,000.00

7,546.88

1000.000000000

0.000000000

1000.000000000

4.375000000

0.00

0.000000000

5.25000000%

0.000000000

86359BRR4

4,790,000.00

0.00

4,790,000.00

20,956.25

1000.000000000

0.000000000

1000.000000000

138272.200000000

0.00

13,827.22

138272.200000000

N/A

0.000000000

86358R9A7

100.00

0.00

100.00

13,827.22

933.249686905

0.000000000

910.244369290

1.681256257

0.00

)

(253.71

)

(0.000529862

2.16249025%

0.000000000

86358R9B5

478,823,003.19

446,861,417.81

0.00

435,845,942.54

805,024.17

0.000000000

0.00

0.000000000

N/A

0.000000000

9ABSQ601

0.00

0.000000000

0.00

0.000000000

N/A

0.000000000

LT1-R

0.00

0.000000000

0.00

0.000000000

N/A

0.000000000

LT2-R

0.00

Total P&I Payment

0.00

13,573.51

478,822,100.00

445,185,636.81

13,359,001.63

Total

434,170,161.54

11,015,475.27

0.00

2,343,526.36

Page 3 of 23

Class

CUSIP

Original

Opening

Principal

Negative

Closing

Interest

Pass-Through

Per $ 1000

Next Rate(3)

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Structured Asset Securities Corporation

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Face Value (1)

Balance

Payment

Adj. or Loss

Amortization

Balance

Payment (2)

Adjustment

Rate

Statement Date:

Component Detail

1000.000000000

0.000000000

1000.000000000

4.375001375

0.00

0.000000000

5.25000000%

0.000000000

M3(1)

3,637,000.00

0.00

3,637,000.00

15,911.88

1000.000000000

0.000000000

1000.000000000

4.375004337

0.00

0.000000000

5.25000000%

0.000000000

M3(2)

1,153,000.00

0.00

1,153,000.00

5,044.38

Page 4 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Statement Date:

Cash Reconciliation Summary

Current Scheduled Interest

Interest Summary

Less Deferred Interest

Plus Gross Advance Interest

Less PPIS Reducing Scheduled Int

620,905.61

0.00
0.00

Less ASER Interest Adv Reduction

0.00

Less Other Adjustment

)

(1,663,347.80

Total

2,359,959.21

Unscheduled Interest:
Prepayment Penalties

13,827.22

Yield Maintenance Penalties

0.00

Other Interest Proceeds

0.00

Total

13,827.22

Less Fees & Expenses Paid By/To Servicer

Less Fee Paid To Servicer
Less Fee Strips Paid by Servicer

Special Servicing Fees

Interest Due Serv on Advances
Recoup of Prior Advances
Misc. Fees & Expenses

Total Unscheduled Fees & Expenses

Total Interest Due Trust

Less Fees & Expenses Paid By/To Trust
Trustee Fee
Fee Strips
Misc. Fees
Interest Reserve Withholding
Plus Interest Reserve Deposit
Total

Total Interest Due Certs

Principal Summary

Scheduled Principal:
Current Scheduled Principal
Advanced Scheduled Principal
Scheduled Principal
Unscheduled Principal:
Curtailments
Prepayments in Full
Liquidation Proceeds
Repurchase Proceeds
Other Principal Proceeds
Total Unscheduled Principal
Remittance Principal

Remittance P&I Due Trust

Remittance P&I Due Certs

Pool Balance Summary

Beginning Pool
Scheduled Principal
Unscheduled Principal
Deferred Interest
Liquidations
Repurchases

Ending Pool

Balance

Count

Principal

Interest

Prior Outstanding

Plus Current Period

Less Recovered

Ending Outstanding

Servicing Fee Summary

Current Servicing Fees
Plus Fees Advanced for PPIS
Less Reduction for PPIS
Plus Delinquent Servicing Fees

Total Servicing Fees

Overcollateralization Summary

PPIS Summary

Gross PPIS
Reduced by PPIE
Reduced by Shortfalls in Fees
Reduced by Other Amounts
PPIS Reducing Scheduled Interest
PPIS Reducing Servicing Fee

PPIS Due Certificate

0.00

0.00
0.00

0.00

2,349,520.38

0.00
0.00
0.00
0.00

0.00

72,127.78

224,438.22
296,566.00

64,557.14

10,654,352.13

0.00
0.00
0.00

10,718,909.27
11,015,475.27

13,364,995.65

446,861,417.81

1,868

296,566.00

10,503,662.80

0.00
0.00

0.00

435,845,942.54

1,819

14,128.82

135,698.99

9,191.75

75,705.80

17,987.29

161,342.95

24,266.05

0.00
0.00

2,713.32

26,979.36

0.00
0.00
0.00
0.00
0.00
0.00

0.00

Advance Summary (Advance Made by Servicer)

)

(24,266.05

2,349,520.38

Interest Not Advanced (

Current Period

)

0.00

1,739,307.31

Workout Fees
Liquidation Fees

0.00
0.00

Less Non Recovered

)

(50,061.84

)

(5,333.28

0.00

Overcollateralization Amount

Overcollateralization Deficiency

1,675,881.00

0.00

Other Principal Information

Principal Remittance Amount
Overcollateralization Release Amount

11,015,475.27

0.00

11,015,475.27

Principal Distribution Amount Amount

Page 5 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Statement Date:

Cash Reconciliation Summary Pool 1

Current Scheduled Interest

Interest Summary

Less Deferred Interest

Plus Gross Advance Interest

Less PPIS Reducing Scheduled Int

430,610.72

0.00
0.00

Less ASER Interest Adv Reduction

0.00

Less Other Adjustment

)

(1,338,542.22

Total

1,843,114.83

Unscheduled Interest:
Prepayment Penalties

13,827.22

Yield Maintenance Penalties

0.00

Other Interest Proceeds

0.00

Total

13,827.22

Less Fees & Expenses Paid By/To Servicer

Less Fee Paid To Servicer
Less Fee Strips Paid by Servicer

Special Servicing Fees

Interest Due Serv on Advances
Recoup of Prior Advances
Misc. Fees & Expenses

Total Unscheduled Fees & Expenses

Total Interest Due Trust

Less Fees & Expenses Paid By/To Trust
Trustee Fee
Fee Strips
Misc. Fees
Interest Reserve Withholding
Plus Interest Reserve Deposit
Total

Total Interest Due Certs

Principal Summary

Remittance P&I Due Trust

Remittance P&I Due Certs

Pool Balance Summary

Beginning Pool
Scheduled Principal
Unscheduled Principal
Deferred Interest
Liquidations
Repurchases

Ending Pool

Balance

Count

Principal

Interest

Prior Outstanding

Plus Current Period

Less Recovered

Ending Outstanding

Servicing Fee Summary

Current Servicing Fees
Plus Fees Advanced for PPIS
Less Reduction for PPIS
Plus Delinquent Servicing Fees

Total Servicing Fees

Overcollateralization Summary

PPIS Summary

Gross PPIS
Reduced by PPIE
Reduced by Shortfalls in Fees
Reduced by Other Amounts
PPIS Reducing Scheduled Interest
PPIS Reducing Servicing Fee

PPIS Due Certificate

0.00

0.00
0.00

0.00

1,840,763.50

0.00
0.00
0.00
0.00

0.00

44,249.70

180,207.78
224,457.48

35,265.87

9,538,195.36

0.00
0.00
0.00

9,573,461.23
9,797,918.71

11,638,682.21

338,551,375.88

1,671

224,457.48

9,402,097.53

0.00
0.00

0.00

328,753,457.17

1,625

13,026.38

130,626.92

8,844.08

73,961.88

16,949.67

156,106.03

16,178.55

0.00
0.00

2,640.65

18,819.20

0.00
0.00
0.00
0.00
0.00
0.00

0.00

Advance Summary (Advance Made by Servicer)

)

(16,178.55

1,840,763.50

Interest Not Advanced (

Current Period

)

0.00

1,412,757.82

Workout Fees
Liquidation Fees

0.00
0.00

Less Non Recovered

)

(48,482.78

)

(4,920.79

0.00

Overcollateralization Amount

Overcollateralization Deficiency

1,273,277.00

0.00

Other Principal Information

Principal Remittance Amount
Overcollateralization Release Amount

9,797,918.71

0.00

9,797,918.71

Principal Distribution Amount Amount

Page 6 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Statement Date:

Cash Reconciliation Summary Pool 2

Current Scheduled Interest

Interest Summary

Less Deferred Interest

Plus Gross Advance Interest

Less PPIS Reducing Scheduled Int

190,294.89

0.00
0.00

Less ASER Interest Adv Reduction

0.00

Less Other Adjustment

)

(324,805.58

Total

516,844.39

Unscheduled Interest:
Prepayment Penalties

0.00

Yield Maintenance Penalties

0.00

Other Interest Proceeds

0.00

Total

0.00

Less Fees & Expenses Paid By/To Servicer

Less Fee Paid To Servicer
Less Fee Strips Paid by Servicer

Special Servicing Fees

Interest Due Serv on Advances
Recoup of Prior Advances
Misc. Fees & Expenses

Total Unscheduled Fees & Expenses

Total Interest Due Trust

Less Fees & Expenses Paid By/To Trust
Trustee Fee
Fee Strips
Misc. Fees
Interest Reserve Withholding
Plus Interest Reserve Deposit
Total

Total Interest Due Certs

Principal Summary

Remittance P&I Due Trust

Remittance P&I Due Certs

Pool Balance Summary

Beginning Pool
Scheduled Principal
Unscheduled Principal
Deferred Interest
Liquidations
Repurchases

Ending Pool

Balance

Count

Principal

Interest

Prior Outstanding

Plus Current Period

Less Recovered

Ending Outstanding

Servicing Fee Summary

Current Servicing Fees
Plus Fees Advanced for PPIS
Less Reduction for PPIS
Plus Delinquent Servicing Fees

Total Servicing Fees

Overcollateralization Summary

PPIS Summary

Gross PPIS
Reduced by PPIE
Reduced by Shortfalls in Fees
Reduced by Other Amounts
PPIS Reducing Scheduled Interest
PPIS Reducing Servicing Fee

PPIS Due Certificate

0.00

0.00
0.00

0.00

508,756.89

0.00
0.00
0.00
0.00

0.00

27,878.08
44,230.44
72,108.52

29,291.27

1,116,156.77

0.00
0.00
0.00

1,145,448.04
1,217,556.56

1,726,313.45

108,310,041.93

197

72,108.52

1,101,565.27

0.00
0.00

0.00

107,092,485.37

194

1,102.44

5,072.07

347.67

1,743.91

1,037.62

5,236.92

8,087.50

0.00
0.00

72.66

8,160.16

0.00
0.00
0.00
0.00
0.00
0.00

0.00

Advance Summary (Advance Made by Servicer)

)

(8,087.50

508,756.89

Interest Not Advanced (

Current Period

)

0.00

326,549.50

Workout Fees
Liquidation Fees

0.00
0.00

Less Non Recovered

)

(1,579.06

)

(412.49

0.00

Overcollateralization Amount

Overcollateralization Deficiency

402,604.00

0.00

Other Principal Information

Principal Remittance Amount
Overcollateralization Release Amount

1,217,556.56

0.00

1,217,556.56

Principal Distribution Amount Amount

Page 7 of 23

Structured Asset Securities Corporation

Class

Accrued

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04
24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Bond Interest Reconciliation

Prior

Other

Additions

Interest

Losses

Current

Cumulative

Accrual

Risk Carry-

Fwd Amt

Interest

Payment

Amount

Interest

Certificate

Interest

Losses

Shortfall

Int. Carry-

Proceeds

Risk Carry-

Certificate

Agreement

Amt Deposited

From YM

Method Days

Basis

Remaining

Statement Date:

Distributable

Prior

Applied Realized

Remaining
Int. Carry-

forward Amt

Principal

Principal
Principal

Extra

Prepayments

Shortfalls

Net
Cap

Rate
Y/N

0.00

1-A1A

134,585.34

0.00

134,585.34

Act/360

0.00

1-A1B

37,040.45

0.00

37,040.45

30/360

0.00

1-A2A

56,442.15

0.00

56,442.15

30/360

0.00

1-A2B

55,222.72

0.00

55,222.72

30/360

0.00

1-A3A

94,166.67

0.00

94,166.67

30/360

0.00

1-A3B

66,593.68

0.00

66,593.68

30/360

0.00

1-A4A

141,316.67

0.00

141,316.67

30/360

0.00

1-A4B

72,687.18

0.00

72,687.18

30/360

0.00

1-A4C

34,375.00

0.00

34,375.00

30/360

0.00

1-A4D

45,083.33

0.00

45,083.33

30/360

0.00

1-A5

136,514.48

0.00

136,514.48

30/360

0.00

1-A6

144,009.60

0.00

144,009.60

30/360

0.00

2-A1

385,231.64

0.00

385,231.64

30/360

0.00

1-M1

46,935.43

0.00

46,935.43

30/360

0.00

1-M2

36,380.00

0.00

36,380.00

30/360

0.00

2-M1

9,587.50

0.00

9,587.50

30/360

0.00

2-M2

7,546.88

0.00

7,546.88

30/360

0.00

20,956.25

0.00

20,956.25

30/360

0.00

13,827.22

30/360

0.00

805,277.88

1,674,877.81

2,480,155.69

805,024.17

30/360

0.00

1,675,131.52

0.00

1,674,877.81

2,329,952.85

4,018,657.88

2,343,526.36

0.00

1,675,131.52

0.00

(2) Principal Prepayments include the Extra Principal Amount

Page 8 of 23

(1) Other Interest Proceeds are additional interest amounts specifically allocated to the bond(s) and used in determining the bonds Distributable Interest.

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04
24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Interest Adjustments Summary

Statement Date

0.00

Special Servicing Fees

Workout Fees

Liquidation Fees

Legal Fees

0.00

Misc. Fees & Expenses Paid by/to Servicer

Interest Paid to Servicer on Outstanding Advances

0.00

ASER Interest Advance Reduction

Interest Not Advanced (Current Period)

Recoup of Prior Advances by Servicer

0.00

Servicing Fees Paid Servicer on Loans Not Advanced

Misc. Fees & Expenses Paid by Trust

0.00

Shortfall Due to Rate Modification

Total Shortfall Allocated to the Bonds

Total Interest Adjustment to the Bonds

253.71

Shortfall Allocated to the Bonds:

Excess Allocated to the Bonds:

Other Interest Proceeds Due the Bonds

Yield Maintenance Penalties Due the Bonds

Prepayment Penalties Due the Bonds

Recovered ASER Interest Due the Bonds

Recovered Interest Due the Bonds

Less Total Shortfall Allocated to the Bonds

Total Excess Allocated to the Bonds

13,827.22

13,827.22

Total Excess Allocated to the Bonds

13,573.51

)

(253.71

Aggregate Interest Adjustment Allocated to the Bonds

0.00

13,827.22

0.00

Prepayment Interest Excess Due the Bonds

0.00

ARD Excess Interest

0.00

253.71

0.00

Net Prepayment Int. Shortfalls Allocated to the Bonds

Other Interest Loss

Page 9 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Other Related Information

Statement Date:

$5,994.01

Insurance Premium...................................................................................................

Insured Payments to Class:

I-A2B...................................................................................................................

I-A3B...................................................................................................................

I-A5......................................................................................................................

I-A6......................................................................................................................

0.00

Page 10 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part I

Distribution

Date

REO

# Balance

Statement Date:

Foreclosure

Delinq 3+ Months

Delinq 2 Months

Delinq 1 Month

Current

# Balance

Delinquency Aging Categories

0.93%

0.67%

0.22%

0.24%

0.00%

0.49%

0.51%

0.00%

27-Sep-04

2,929,392

1,038,004

2,239,215

1,789

429,639,332

98.35%

98.58%

0.70%

0.56%

0.21%

0.36%

0.05%

116,541

0.03%

0.16%

0.06%

0.00%

25-Aug-04

2,484,623

1,586,969

285,289

1,847

442,387,995

98.88%

99.00%

0.58%

0.65%

0.00%

0.05%

116,608

0.03%

0.00%

26-Jul-04

2,947,840

1,884

450,272,640

99.37%

99.32%

0.21%

0.19%

0.05%

0.03%

0.00%

25-Jun-04

866,177

116,675

1,920

458,665,702

99.74%

99.79%

0.00%

25-May-04

1,957

468,019,954

100.00%

Page 11 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part I

Distribution

Date

REO

# Balance

Statement Date:

Foreclosure

Delinq 3+ Months

Delinq 2 Months

Delinq 1 Month

Current

# Balance

Delinquency Aging Categories

Pool 1

1.07%

0.91%

0.13%

0.08%

0.00%

0.56%

0.69%

0.00%

27-Sep-04

2,929,392

264,051

2,239,215

1,567

317,530,112

98.24%

98.32%

0.67%

0.51%

0.24%

0.48%

0.06%

116,541

0.04%

0.18%

0.09%

0.00%

25-Aug-04

1,709,987

1,586,969

285,289

1,622

329,057,374

98.84%

98.89%

0.66%

0.87%

0.00%

0.06%

116,608

0.03%

0.00%

26-Jul-04

2,947,840

1,655

335,111,921

99.28%

99.09%

0.24%

0.25%

0.06%

0.03%

0.00%

25-Jun-04

866,177

116,675

1,691

343,414,194

99.71%

0.00%

25-May-04

1,727

351,482,595

100.00%

Page 12 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part I

Distribution

Date

REO

# Balance

Statement Date:

Foreclosure

Delinq 3+ Months

Delinq 2 Months

Delinq 1 Month

Current

# Balance

Delinquency Aging Categories

Pool 2

0.00%

0.52%

0.33%

0.00%

27-Sep-04

348,435

193

106,744,050

99.48%

99.67%

0.51%

0.32%

0.00%

25-Aug-04

348,783

196

107,961,259

99.49%

99.68%

0.00%

26-Jul-04

198

108,834,486

100.00%

0.00%

25-Jun-04

198

108,920,329

100.00%

0.00%

25-May-04

198

109,953,829

100.00%

Page 13 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Distribution

Date

Statement Date:

Current 31 - 60 Days 61 - 90 Days 90 + Days
# Balance # Balance # Balance # Balance

In Foreclosure and Delinquent

In Bankruptcy and Delinquent

In REO and Delinquent

Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part II

Current

31 - 60 Days

61 - 90 Days

90 + Days

Balance

27-Sep-04

251,166

1,988,049

0.00%

0.05%

0.06%

0.44%

0.46%

0.00%

0.00% 0.00%

0.00%

0.05%

0.02%

66,865

0.00%

25-Aug-04

285,289

0.00%

0.16%

0.06%

0.00%

0.00% 0.00%

0.00%

0.11%

0.04%

170,383

0.00%

26-Jul-04

0.00%

0.00% 0.00%

0.00%

0.11%

0.04%

170,440

0.00%

25-Jun-04

0.00%

0.00% 0.00%

0.00%

0.05%

0.02%

103,550

0.00%

25-May-04

0.00%

0.00% 0.00%

0.00%

Page 14 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Distribution

Date

Statement Date:

Current 31 - 60 Days 61 - 90 Days 90 + Days
# Balance # Balance # Balance # Balance

In Foreclosure and Delinquent

In Bankruptcy and Delinquent

In REO and Delinquent

Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part II - Pool 1

Current

31 - 60 Days

61 - 90 Days

90 + Days

Balance

27-Sep-04

251,166

1,988,049

0.00%

0.06%

0.08%

0.50%

0.62%

0.00%

0.00% 0.00%

0.00%

0.06%

0.02%

66,865

0.00%

25-Aug-04

285,289

0.00%

0.18%

0.09%

0.00%

0.00% 0.00%

0.00%

0.12%

0.05%

170,383

0.00%

26-Jul-04

0.00%

0.00% 0.00%

0.00%

0.12%

0.05%

170,440

0.00%

25-Jun-04

0.00%

0.00% 0.00%

0.00%

0.06%

0.03%

103,550

0.00%

25-May-04

0.00%

0.00% 0.00%

0.00%

Page 15 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Distribution

Date

Statement Date:

Current 31 - 60 Days 61 - 90 Days 90 + Days
# Balance # Balance # Balance # Balance

In Foreclosure and Delinquent

In Bankruptcy and Delinquent

In REO and Delinquent

Asset-Backed Facts ~ 15 Month Historical Loan Status Summary Part II - Pool 2

Current

31 - 60 Days

61 - 90 Days

90 + Days

Balance

27-Sep-04

0.00%

0.00% 0.00%

0.00%

25-Aug-04

0.00%

0.00% 0.00%

0.00%

26-Jul-04

0.00%

0.00% 0.00%

0.00%

25-Jun-04

0.00%

0.00% 0.00%

0.00%

25-May-04

0.00%

0.00% 0.00%

0.00%

Page 16 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Asset-Backed Facts ~ 15 Month Historical Payoff/Loss Summary

Distribution

Date

Ending Pool (1)

Payoffs(2)

Realized Losses (2)

Remaining Term

Curr Weighted Avg.

# Balance

# Amount

Life

Coupon Remit

Statement Date:

Ending Arrearage (1)

Balance

Insurance

Substitution

Liquidation

Proceeds

27-Sep-04

1,819

91.59%

435,845,943

91.02%

2.62%

2.38%

0.00%

352

6.52%

6.27%

10,654,352

0.00

25-Aug-04

1,868

94.06%

446,861,418

93.32%

1.48%

1.35%

0.00%

352

6.53%

6.28%

6,109,715

0.00

26-Jul-04

1,896

95.47%

453,337,089

94.68%

1.51%

1.27%

0.00%

352

6.53%

6.28%

5,841,628

0.00

25-Jun-04

1,925

96.93%

459,648,554

96.00%

0.05%

0.01%

0.00%

352

6.54%

6.29%

28,768

0.00

25-May-04

1,957

98.54%

468,019,954

97.74%

1.46%

2.19%

0.00%

352

6.54%

6.29%

10,470,952

0.00

(1) Percentage based on pool as of cutoff. (2) Percentage based on pool as of beginning of period.

Page 17 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Asset-Backed Facts ~ 15 Month Historical Payoff/Loss Summary

Distribution

Date

Ending Pool (1)

Payoffs(2)

Realized Losses (2)

Remaining Term

Curr Weighted Avg.

# Balance

# Amount

Life

Coupon Remit

Statement Date:

Ending Arrearage (1)

Balance

Insurance

Substitution

Liquidation

Proceeds

Pool 1

27-Sep-04

1,595

80.31%

322,962,770

67.45%

2.80%

2.87%

0.00%

352

6.72%

6.47%

9,538,195

0.00

25-Aug-04

1,641

82.63%

332,756,160

69.49%

1.56%

1.52%

0.00%

352

6.72%

6.47%

5,144,038

0.00

26-Jul-04

1,667

83.94%

338,176,370

70.63%

1.71%

1.70%

0.00%

352

6.73%

6.48%

5,841,628

0.00

25-Jun-04

1,696

85.40%

344,397,046

71.93%

0.06%

0.01%

0.00%

352

6.73%

6.48%

28,768

0.00

25-May-04

1,727

86.96%

351,482,595

73.41%

1.43%

1.53%

0.00%

352

6.73%

6.48%

5,465,951

0.00

(1) Percentage based on pool as of cutoff. (2) Percentage based on pool as of beginning of period.

Page 18 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Asset-Backed Facts ~ 15 Month Historical Payoff/Loss Summary

Distribution

Date

Ending Pool (1)

Payoffs(2)

Realized Losses (2)

Remaining Term

Curr Weighted Avg.

# Balance

# Amount

Life

Coupon Remit

Statement Date:

Ending Arrearage (1)

Balance

Insurance

Substitution

Liquidation

Proceeds

Pool 2

27-Sep-04

194

9.77%

107,092,485

22.37%

1.52%

1.03%

0.00%

353

5.89%

5.64%

1,116,157

0.00

25-Aug-04

197

9.92%

108,310,042

22.62%

0.51%

0.40%

0.00%

353

5.89%

5.64%

439,145

0.00

26-Jul-04

198

9.97%

108,834,486

22.73%

0.00%

353

5.89%

5.64%

0.00

25-Jun-04

198

9.97%

108,920,329

22.75%

0.00%

353

5.89%

5.64%

0.00

25-May-04

198

9.97%

109,953,829

22.96%

1.98%

4.35%

0.00%

353

5.90%

5.65%

5,005,001

0.00

(1) Percentage based on pool as of cutoff. (2) Percentage based on pool as of beginning of period.

Page 19 of 23

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Realized Loss Detail

Period

Disclosure

Control #

Appraisal

Date

Appraisal

Value

Beginning
Scheduled

Balance

Gross

Proceeds

Gross Proceeds

as a % of

Sched. Balance

Aggregate

Liquidation
Expenses *

Net

Liquidation

Proceeds

Net Proceeds

as a % of

Sched. Balance

Realized

Loss

Statement Date:

Current Total
Cumulative

Page 20 of 23

* Aggregate liquidation expenses also include outstanding P&I advances and unpaid servicing fees, unpaid trustee fees, etc..

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Realized Loss Detail

Period

Disclosure

Control #

Appraisal

Date

Appraisal

Value

Beginning
Scheduled

Balance

Gross

Proceeds

Gross Proceeds

as a % of

Sched. Balance

Aggregate

Liquidation
Expenses *

Net

Liquidation

Proceeds

Net Proceeds

as a % of

Sched. Balance

Realized

Loss

Statement Date:

Pool 1

Current Total
Cumulative

Page 21 of 23

* Aggregate liquidation expenses also include outstanding P&I advances and unpaid servicing fees, unpaid trustee fees, etc..

Structured Asset Securities Corporation

Payment Date:
Prior Payment:
Next Payment:
Record Date:

27-Sep-04
27-Sep-04

25-Aug-04

25-Oct-04

24-Sep-04

Mortgage Pass-Through Certificates

Series 2004-9XS

ABN AMRO Acct: 721781.2

Realized Loss Detail

Period

Disclosure

Control #

Appraisal

Date

Appraisal

Value

Beginning
Scheduled

Balance

Gross

Proceeds

Gross Proceeds

as a % of

Sched. Balance

Aggregate

Liquidation
Expenses *

Net

Liquidation

Proceeds

Net Proceeds

as a % of

Sched. Balance

Realized

Loss

Statement Date:

Pool 2

Current Total
Cumulative

Page 22 of 23

* Aggregate liquidation expenses also include outstanding P&I advances and unpaid servicing fees, unpaid trustee fees, etc..

Structured Asset Securities Corporation

Substitution Detail History

ABN AMRO Acct: 721781.2

Series 2004-9XS

Mortgage Pass-Through Certificates

24-Sep-04

25-Oct-04

25-Aug-04

27-Sep-04

Record Date:

Next Payment:

Prior Payment:

Payment Date:

Statement Date:

Property ID

Deleted Loan

Qualified Substitute

Scheduled Prin Bal

Page 23 of 23

Original Property

Per Section 7.01(a)(i) of the Property Management and Lease Servicing Agreement, aggregate Appraised Value of the Qualified Substitute Mortgaged Properties acquired by the Issuer since the Closing Date
in connection with the substitution or exchange pursuant to Section 7.01 is not to exceed 25% of the aggregate Initial Appraised Value of the Mortgaged Properties.

(A)

Filing Compare · Structured Asset Securities Corp Mortgage Pass-through Certificates 2004-9XS