
                                       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):  December 27, 2004
                          (Date of earliest event reported)

            Indymac MBS Inc (as Depositor under the Pooling and Servicing
                Agreement, dated as September 1, 2004, providing for the
               issuance of IndyMAc INDX Mortgage Loan Trust 2004-AR9
                Mortgage Pass-Through Certificates, Series 2004-AR9)
                 (Exact name of registrant as specified in charter)


                                         DELAWARE
                     (State or Other Jurisdiction of Incorporation)

               333-116470-15                         95-4791925
          (Commission File Number)        (I.R.S. Employer Identification No.)


          155 NORTH LAKE AVENUE
          PASADENA, CALIFORNIA                         91101
          (Address of principal executive offices)     (Zip Code)



          Registrant's Telephone Number, Including Area Code:  (800) 669-2300

       (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(b) under the Exchange Act
(17 CFR 240.14a-12(b))

[  ] 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))


     Item 8.01  Other Events

     Attached hereto is a copy of the Monthly Remittance Statements to the
     Certificateholders which was derived from the monthly information
     submitted by the Master Servicer of the Trust to the Trustee.


     Item 9.01 Financial Statements and Exhibits

     (c) Exhibits:

     Exhibit No. Description

     99.1 Monthly Remittance Statement to the Certificateholders dated as of
     December 27, 2004.

                                    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.


                                  Deutsche Bank National Trust Company,
                                  in its capacity as Trustee under the
                                  Pooling and Servicing Agreement on
                                  behalf of Indymac MBS Inc, Registrant


          Date:  Dec 28, 2004               By:  /s/  Katherine M. Wannenmacher
                                            Katherine M. Wannenmacher
                                            Vice President


                                   EXHIBIT INDEX

          DOCUMENT

          99.1 Monthly Remittance Statement to the Certificateholders
          dated as of December 27, 2004.



IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

				External Parties						Table of Contents

													Page
				Seller									Page
				Seller						1. Certificate Payment Report					2
				IndyMac Bank						1. Certificate Payment Report					2
				IndyMac Bank						2. Collection Account Report					6
										2. Collection Account Report					6
										3. Credit Enhancement Report					11
										4. Collateral Report					12
				Certificate Insurer(s)						5. Delinquency Report					19
				Certificate Insurer(s)						5. Delinquency Report					19
										6. REO Report					25

										7. Foreclosure Report					26
										8. Prepayment Report					27
										9. Prepayment Detail Report					32
										9. Prepayment Detail Report					32
										10. Realized Loss Report					33
										11. Realized Loss Detail Report					38
				Servicer(s)						11. Realized Loss Detail Report					38
				Servicer(s)						12. Triggers and Adj. Cert. Report					39
				IndyMac Bank						12. Triggers and Adj. Cert. Report					39
				IndyMac Bank						13. Other Related Information					41
										13. Other Related Information					41


				Underwriter(s)
				CS First Boston


										Total Number of Pages					42
										Total Number of Pages

				Dates						Contacts

				Cut-Off Date:			September 01, 2004			Brent Hoyler
				Close Date:			September 30, 2004			Administrator
				First Distribution Date:			October 25, 2004			(714) 247-6322
										Brent.Hoyler@db.com
										Brent.Hoyler@db.com
										Address:
										1761 East St. Andrew Place, Santa Ana, CA 92705
				Distribution Date:			December 27, 2004
										Factor Information:			(800) 735-7777
				Record Date:			November 30, 2004			Factor Information:			(800) 735-7777
										Main Phone Number:			(714) 247-6000

							December 24, 2004
							December 24, 2004

										https://www.tss.db.com/invr






Page 1 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Certificate Payment Report
Current Period Distribution -
					Prior												Current
	Class		Original		Principal						Total		Realized		Deferred		Principal
	Class		Original		Principal						Total		Realized		Deferred		Principal
Class	Type	Cur	Face Value		Balance		Interest		Principal		Distribution		Loss		Interest		Balance


					(1)		(2)		(3)		(4)=(2)+(3)		(5)		(6)		(7)=(1)-(3)-(5)+(6)

1-A	SR	$	58,005,000.00		56,286,265.19		234,913.47		2,307,812.82		2,542,726.29		0.00		0.00		53,978,452.37
1-A	SR	$	58,005,000.00		56,286,265.19		234,913.47		2,307,812.82		2,542,726.29		0.00		0.00		53,978,452.37
2-A	SR	$	43,440,000.00		43,376,878.05		188,862.33		661,007.57		849,869.90		0.00		0.00		42,715,870.48
3-A	SR	$	51,040,000.00		49,958,100.69		208,797.77		1,012,268.85		1,221,066.62		0.00		0.00		48,945,831.84
4-A	SR	$	35,335,000.00		35,326,237.93		155,639.34		9,170.86		164,810.20		0.00		0.00		35,317,067.07
5-A-1	SR/SEQ	$	45,000,000.00		42,138,946.67		93,641.55		858,734.80		952,376.35		0.00		0.00		41,280,211.87
5-A-2	SR/SEQ	$	80,696,000.00		75,565,432.01		169,223.60		1,539,921.42		1,709,145.02		0.00		0.00		74,025,510.59
5-A-3	SR/SEQ	$	13,967,000.00		13,078,992.62		29,965.25		266,532.20		296,497.45		0.00		0.00		12,812,460.42
5-M-1	MEZ/SEQ	$	5,284,000.00		5,284,000.00		12,879.68		0.00		12,879.68		0.00		0.00		5,284,000.00
5-M-2	MEZ/SEQ	$	2,944,000.00		2,944,000.00		8,823.78		0.00		8,823.78		0.00		0.00		2,944,000.00
5-M-3	MEZ/SEQ	$	1,133,000.00		1,133,000.00		3,981.22		0.00		3,981.22		0.00		0.00		1,133,000.00
5-M-4	MEZ/SEQ	$	679,000.00		679,000.00		2,502.86		0.00		2,502.86		0.00		0.00		679,000.00
5-M-5	MEZ/SEQ	$	1,284,208.00		1,284,208.00		5,176.05		0.00		5,176.05		0.00		0.00		1,284,208.00
B-1	SUB	$	6,615,000.00		6,603,781.88		28,136.62		1,035.61		29,172.23		0.00		0.00		6,602,746.27
B-2	SUB	$	3,562,000.00		3,555,959.34		15,150.81		557.65		15,708.46		0.00		0.00		3,555,401.69
B-3	SUB	$	2,139,000.00		2,135,372.55		9,098.15		334.87		9,433.02		0.00		0.00		2,135,037.68
B-4	SUB	$	1,730,000.00		1,727,066.16		7,358.48		270.84		7,629.32		0.00		0.00		1,726,795.32
B-5	SUB	$	1,018,000.00		1,016,273.62		4,330.02		159.37		4,489.39		0.00		0.00		1,016,114.25
B-6	SUB	$	714,966.75		713,753.52		3,041.08		111.93		3,153.01		0.00		0.00		713,641.59
5-C	EXE	$	0.00		754,935.83		358,935.21		0.00		358,935.21		0.00		0.00		754,935.83
A-R	SR/R	$	100.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00
P	P	$	100.00		100.00		3,957.06		0.00		3,957.06		0.00		0.00		100.00


Total			354,586,374.75		343,562,304.06		1,544,414.33		6,657,918.79		8,202,333.12		0.00		0.00		336,904,385.27
Total





Page 2 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face-
									Orig. Principal		Prior							Current
									Orig. Principal		Prior							Current
	Period		Period						(with Notional)		Principal						Total	Principal
	Period		Period
Class	Starting		Ending		Method		Cusip		Balance		Balance		Interest		Principal		Distribution	Balance

									(1)		(1)		(2)		(3)		(4)=(2)+(3)	(5)
1-A	11/01/04		11/30/04		A-30/360		45660N3N3		58,005,000.00		970.369196		4.049883		39.786446		43.836329	930.582749
2-A	11/01/04		11/30/04		A-30/360		45660N3P8		43,440,000.00		998.546916		4.347660		15.216565		19.564224	983.330352
3-A	11/01/04		11/30/04		A-30/360		45660N3Q6		51,040,000.00		978.802913		4.090865		19.832854		23.923719	958.970060
4-A	11/01/04		11/30/04		A-30/360		45660N3R4		35,335,000.00		999.752029		4.404679		0.259540		4.664220	999.492488
5-A-1	11/26/04		12/26/04		A-Act/360		45660N3S2		45,000,000.00		936.421037		2.080923		19.082996		21.163919	917.338042
5-A-2	11/26/04		12/26/04		A-Act/360		45660N5D3		80,696,000.00		936.421037		2.097051		19.082996		21.180046	917.338041
5-A-3	11/26/04		12/26/04		A-Act/360		45660N5E1		13,967,000.00		936.421037		2.145432		19.082996		21.228428	917.338041
5-M-1	11/26/04		12/26/04		A-Act/360		45660N3X1		5,284,000.00		1,000.000000		2.437487		0.000000		2.437487	1,000.000000
5-M-2	11/26/04		12/26/04		A-Act/360		45660N3Y9		2,944,000.00		1,000.000000		2.997208		0.000000		2.997208	1,000.000000
5-M-3	11/26/04		12/26/04		A-Act/360		45660N3Z6		1,133,000.00		1,000.000000		3.513875		0.000000		3.513875	1,000.000000
5-M-4	11/26/04		12/26/04		A-Act/360		45660N4A0		679,000.00		1,000.000000		3.686097		0.000000		3.686097	1,000.000000
5-M-5	11/26/04		12/26/04		A-Act/360		45660N4B8		1,284,208.00		1,000.000000		4.030539		0.000000		4.030539	1,000.000000
B-1	11/01/04		11/30/04		A-30/360		45660N3U7		6,615,000.00		998.304139		4.253457		0.156555		4.410012	998.147584
B-2	11/01/04		11/30/04		A-30/360		45660N3V5		3,562,000.00		998.304138		4.253456		0.156555		4.410011	998.147583
B-3	11/01/04		11/30/04		A-30/360		45660N3W3		2,139,000.00		998.304137		4.253460		0.156554		4.410014	998.147583
B-4	11/01/04		11/30/04		A-30/360		45660N4C6		1,730,000.00		998.304139		4.253457		0.156555		4.410012	998.147584
B-5	11/01/04		11/30/04		A-30/360		45660N4D4		1,018,000.00		998.304145		4.253458		0.156552		4.410010	998.147593
B-6	11/01/04		11/30/04		A-30/360		45660N4E2		714,966.75		998.303096		4.253457		0.156553		4.410009	998.146543
5-C	11/01/04		11/30/04		A-30/360		45660N5F8		150,987,208.21		4.999999		2.377256		0.000000		2.377256	4.999999
A-R	11/01/04		11/30/04		A-30/360		45660N3T0		100.00		0.000000		0.000000		0.000000		0.000000	0.000000
P	11/01/04		11/30/04		A-30/360		IN04A93P1		100.00		1,000.000000		39,570.600000		0.000000		39,570.600000	1,000.000000




Page 3 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

Distribution to Date -
																	Current


	Original				Unscheduled		Scheduled		Total		Total		Realized		Deferred		Principal

Class	Face Value		Interest		Principal		Principal		Principal		Distribution		Loss		Interest		Balance
	(1)		(2)		(3)		(4)		(5)=(3)+(4)		(6)=(2)+(5)		(7)		(8)		(9)=(1)-(5)-(7)+(8)
1-A	58,005,000.00		717,040.24		3,958,904.51		67,643.12		4,026,547.63		4,743,587.87		0.00		0.00		53,978,452.37
2-A	43,440,000.00		567,081.76		689,654.40		34,475.12		724,129.52		1,291,211.28		0.00		0.00		42,715,870.48
3-A	51,040,000.00		632,176.59		1,807,672.62		286,495.54		2,094,168.16		2,726,344.75		0.00		0.00		48,945,831.84
4-A	35,335,000.00		466,984.53		6,709.06		11,223.87		17,932.93		484,917.46		0.00		0.00		35,317,067.07
5-A-1	45,000,000.00		253,990.30		0.00		3,719,788.13		3,719,788.13		3,973,778.43		0.00		0.00		41,280,211.87
5-A-2	80,696,000.00		459,278.10		0.00		6,670,489.41		6,670,489.41		7,129,767.51		0.00		0.00		74,025,510.59
5-A-3	13,967,000.00		81,471.68		0.00		1,154,539.58		1,154,539.58		1,236,011.26		0.00		0.00		12,812,460.42
5-M-1	5,284,000.00		34,146.32		0.00		0.00		0.00		34,146.32		0.00		0.00		5,284,000.00
5-M-2	2,944,000.00		23,702.43		0.00		0.00		0.00		23,702.43		0.00		0.00		2,944,000.00
5-M-3	1,133,000.00		10,783.62		0.00		0.00		0.00		10,783.62		0.00		0.00		1,133,000.00
5-M-4	679,000.00		6,794.52		0.00		0.00		0.00		6,794.52		0.00		0.00		679,000.00
5-M-5	1,284,208.00		14,106.29		0.00		0.00		0.00		14,106.29		0.00		0.00		1,284,208.00
B-1	6,615,000.00		84,475.55		0.00		12,253.73		12,253.73		96,729.28		0.00		0.00		6,602,746.27
B-2	3,562,000.00		45,487.81		0.00		6,598.31		6,598.31		52,086.12		0.00		0.00		3,555,401.69
B-3	2,139,000.00		27,315.68		0.00		3,962.32		3,962.32		31,278.00		0.00		0.00		2,135,037.68
B-4	1,730,000.00		22,092.62		0.00		3,204.68		3,204.68		25,297.30		0.00		0.00		1,726,795.32
B-5	1,018,000.00		13,000.17		0.00		1,885.75		1,885.75		14,885.92		0.00		0.00		1,016,114.25
B-6	714,966.75		9,130.33		0.00		1,324.41		1,324.41		10,454.74		0.00		0.00		713,641.59
5-C	0.00		474,520.32		0.00		0.00		0.00		474,520.32		0.00		754,935.83		754,935.83
A-R	100.00		0.42		0.00		0.00		100.00		100.42		0.00		0.00		0.00
P	100.00		53,402.06		0.00		0.00		0.00		53,402.06		0.00		0.00		100.00


Total	354,586,374.75		3,996,981.34		6,462,940.59		11,973,883.97		18,436,924.56		22,433,905.90		0.00		754,935.83		336,904,385.27



Page 4 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

Interest Detail -
	Pass		Prior Principal				Non-		Prior		Unscheduled				Paid or		Current
	Pass		Prior Principal				Non-		Prior		Unscheduled				Paid or

	Through		(with Notional)		Accrued		Supported		Unpaid		Interest		Optimal		Deferred		Unpaid

Class	Rate		Balance		Interest		Interest SF		Interest		Adjustment		Interest		Interest		Interest
					(1)		(2)		(3)		(4)		(5)=(1)-(2)+(3)+(4)		(6)		(7)=(5)-(6)
1-A	5.00826%		56,286,265.19		234,913.47		0.00		0.00		0.00		234,913.47		234,913.47		0.00
2-A	5.22478%		43,376,878.05		188,862.33		0.00		0.00		0.00		188,862.33		188,862.33		0.00
3-A	5.01535%		49,958,100.69		208,797.77		0.00		0.00		0.00		208,797.77		208,797.77		0.00
4-A	5.28693%		35,326,237.93		155,639.34		0.00		0.00		0.00		155,639.34		155,639.34		0.00
5-A-1	2.58063%		42,138,946.67		93,641.55		0.00		0.00		0.00		93,641.55		93,641.55		0.00
5-A-2	2.60063%		75,565,432.01		169,223.60		0.00		0.00		0.00		169,223.60		169,223.60		0.00
5-A-3	2.66063%		13,078,992.62		29,965.25		0.00		0.00		0.00		29,965.25		29,965.25		0.00
5-M-1	2.83063%		5,284,000.00		12,879.68		0.00		0.00		0.00		12,879.68		12,879.68		0.00
5-M-2	3.48063%		2,944,000.00		8,823.78		0.00		0.00		0.00		8,823.78		8,823.78		0.00
5-M-3	4.08063%		1,133,000.00		3,981.22		0.00		0.00		0.00		3,981.22		3,981.22		0.00
5-M-4	4.28063%		679,000.00		2,502.86		0.00		0.00		0.00		2,502.86		2,502.86		0.00
5-M-5	4.68063%		1,284,208.00		5,176.05		0.00		0.00		0.00		5,176.05		5,176.05		0.00
B-1	5.11282%		6,603,781.88		28,136.62		0.00		0.00		0.00		28,136.62		28,136.62		0.00
B-2	5.11282%		3,555,959.34		15,150.81		0.00		0.00		0.00		15,150.81		15,150.81		0.00
B-3	5.11282%		2,135,372.55		9,098.15		0.00		0.00		0.00		9,098.15		9,098.15		0.00
B-4	5.11282%		1,727,066.16		7,358.48		0.00		0.00		0.00		7,358.48		7,358.48		0.00
B-5	5.11282%		1,016,273.62		4,330.02		0.00		0.00		0.00		4,330.02		4,330.02		0.00
B-6	5.11282%		713,753.52		3,041.08		0.00		0.00		0.00		3,041.08		3,041.08		0.00
5-C	570.54154%		754,935.83		0.00		0.00		0.00		0.00		0.00		358,935.21		0.00
A-R	0.00000%		0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00
P	0.00000%		100.00		0.00		0.00		0.00		0.00		0.00		3,957.06		0.00


Total			343,562,304.06		#######		0.00		0.00		0.00		1,181,522.06		1,544,414.33		0.00



Page 5 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Collection Account Report
SUMMARY
SUMMARY
														Group 5
Principal Collections														2,665,188.42
Principal Withrawals														0.00
Principal Other Accounts														0.00
TOTAL NET PRINCIPAL														2,665,188.42
Interest Collections														695,072.46
Interest Withdrawals														-0.00
Interest Other Accounts														0.00
Interest Fees														-11,746.30
TOTAL NET INTEREST														683,326.16
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION														3,348,514.58

SUMMARY
SUMMARY
						Group 4		Group 3		Group 2		Group 1		Total
Principal Collections						9,450.99		1,012,482.89		661,902.79		2,308,893.71		6,657,918.80
Principal Withrawals						0.00		0.00		0.00		0.00		0.00
Principal Other Accounts						0.00		0.00		0.00		0.00		0.00
TOTAL NET PRINCIPAL						9,450.99		1,012,482.89		661,902.79		2,308,893.71		6,657,918.80
Interest Collections						172,710.85		232,659.76		210,240.47		262,041.87		1,576,682.47
Interest Withdrawals						-0.00		-0.00		-0.00		-0.00		-0.00
Interest Other Accounts						0.00		0.00		0.00		0.00		3,957.06
Interest Fees						-4,001.05		-6,032.11		-4,706.76		-5,781.93		-32,268.14
TOTAL NET INTEREST						168,709.80		226,627.65		205,533.72		256,259.94		1,544,414.33
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION						178,160.79		1,239,110.54		867,436.51		2,565,153.65		8,202,333.13





Page 6 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

PRINCIPAL - COLLECTIONS
PRINCIPAL - COLLECTIONS
															Group 5
Scheduled Principal Received															21,007.61
Curtailments															13,196.51
Prepayments In Full															2,630,984.30
Repurchased/Substitutions															0.00
Liquidations															0.00
Insurance Principal															0.00
Other Additional Principal															0.00
Delinquent Principal															-17,273.37
Realized Losses															-0.00
Advanced Principal															17,273.37
TOTAL PRINCIPAL COLLECTED															2,665,188.42
PRINCIPAL - COLLECTIONS
PRINCIPAL - COLLECTIONS
							Group 4		Group 3		Group 2		Group 1		Total
Scheduled Principal Received							3,615.85		2,720.59		11,537.08		13,572.26		52,453.39
Curtailments							5,835.14		46,662.30		10,115.71		7,474.56		83,284.22
Prepayments In Full							0.00		963,100.00		640,250.00		2,287,846.89		6,522,181.19
Repurchased/Substitutions							0.00		0.00		0.00		0.00		0.00
Liquidations							0.00		0.00		0.00		0.00		0.00
Insurance Principal							0.00		0.00		0.00		0.00		0.00
Other Additional Principal							0.00		0.00		0.00		0.00		0.00
Delinquent Principal							-2,538.95		-1,814.64		-8,453.68		-10,906.93		-40,987.57
Realized Losses							-0.00		-0.00		-0.00		-0.00		-0.00
Advanced Principal							2,538.95		1,814.64		8,453.68		10,906.93		40,987.57
TOTAL PRINCIPAL COLLECTED							9,450.99		1,012,482.89		661,902.79		2,308,893.71		6,657,918.80


PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK





Page 7 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

PRINCIPAL - OTHER ACCOUNTS
PRINCIPAL - OTHER ACCOUNTS
														Group 5
TOTAL PRINCIPAL OTHER ACCOUNTS														0.00

PRINCIPAL - OTHER ACCOUNTS
PRINCIPAL - OTHER ACCOUNTS
						Group 4		Group 3		Group 2		Group 1		Total
TOTAL PRINCIPAL OTHER ACCOUNTS						0.00		0.00		0.00		0.00		0.00



INTEREST - COLLECTIONS
INTEREST - COLLECTIONS
														Group 5
Scheduled Interest														728,565.96
Repurchased/Substitution Interest														0.00
Liquidation Interest														0.00
Insurance Interest														0.00
Other Additional Interest														0.00
Prepayment Interest Shortfalls														-2,922.96
Delinquent Interest														-546,251.47
Compensating Interest														2,922.96
Civil Relief Act Shortfalls														-0.00
Interest Advanced														512,757.97
TOTAL INTEREST COLLECTED														695,072.46
INTEREST - COLLECTIONS
INTEREST - COLLECTIONS
						Group 4		Group 3		Group 2		Group 1		Total
Scheduled Interest						180,835.89		243,798.64		220,425.24		275,626.24		1,649,251.97
Repurchased/Substitution Interest						0.00		0.00		0.00		0.00		0.00
Liquidation Interest						0.00		0.00		0.00		0.00		0.00
Insurance Interest						0.00		0.00		0.00		0.00		0.00
Other Additional Interest						0.00		0.00		0.00		0.00		3,957.06
Prepayment Interest Shortfalls						-0.00		-1,187.95		-88.92		-1,695.55		-5,895.39
Delinquent Interest						-123,103.10		-161,069.19		-152,523.57		-196,289.65		-1,179,236.98
Compensating Interest						0.00		1,187.95		88.92		1,695.55		5,895.39
Civil Relief Act Shortfalls						-0.00		-0.00		-0.00		-0.00		-0.00
Interest Advanced						114,978.06		149,930.31		142,338.81		182,705.28		1,102,710.42
TOTAL INTEREST COLLECTED						172,710.85		232,659.76		210,240.47		262,041.87		1,576,682.47




Page 8 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

INTEREST - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK



INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
														Group 5
Prepayment Charges
TOTAL INTEREST OTHER ACCOUNTS														0.00

INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
						Group 4		Group 3		Group 2		Group 1		Total
Prepayment Charges														3,957.06
TOTAL INTEREST OTHER ACCOUNTS						0.00		0.00		0.00		0.00		3,957.06





Page 9 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

INTEREST - FEES
INTEREST - FEES
														Group 5
Current Servicing Fees														11,151.04
Trustee Fees														595.26
TOTAL INTEREST FEES														11,746.30

INTEREST - FEES
INTEREST - FEES
						Group 4		Group 3		Group 2		Group 1		Total
Current Servicing Fees						3,841.49		5,806.18		4,510.82		5,527.11		30,836.64
Trustee Fees						159.55		225.93		195.94		254.82		1,431.50
TOTAL INTEREST FEES						4,001.05		6,032.11		4,706.76		5,781.93		32,268.14




Page 10 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Credit Enhancement Report
ACCOUNTS


SPACE INTENTIONALLY LEFT BLANK





INSURANCE
INSURANCE
														Group 5
PMI PREMIUM														0.00

INSURANCE
INSURANCE
						Group 4		Group 3		Group 2		Group 1		Total
PMI PREMIUM						0.00		0.00		0.00		0.00		0.00



STRUCTURAL FEATURES

SPACE INTENTIONALLY LEFT BLANK



Page 11 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Collateral Report


COLLATERAL



															Group 5



*Loan Count:*


Original														500
Prior														483
Prefunding														0
Scheduled Paid Offs														-0
Full Voluntary Prepayments														-10
Repurchases														-0
Liquidations														-0
Current														473
*Principal Balance:*


Original														150,987,208.21
Prior														142,862,515.34
Prefunding														0.00
Scheduled Principal														-21,007.61
Partial Prepayments														-13,196.51
Full Voluntary Prepayments														-2,630,984.30
Repurchases														-0.00
Liquidations														-0.00
Current														140,197,326.92

COLLATERAL



							Group 4		Group 3		Group 2		Group 1		Total



*Loan Count:*
*Loan Count:*


Original						169		248		87		124		1,128
Prior						169		244		87		121		1,104
Prefunding						0		0		0		0		0
Scheduled Paid Offs						-0		-0		-0		-0		-0
Full Voluntary Prepayments						-0		-4		-1		-6		-21
Repurchases						-0		-0		-0		-0		-0
Liquidations						-0		-0		-0		-0		-0
Current						169		240		86		115		1,083
*Principal Balance:*


Original						38,302,226.73		55,328,198.15		47,090,731.73		62,877,910.14		354,586,274.96
Prior						38,292,907.90		54,224,176.59		47,025,860.52		61,156,744.66		343,562,205.01
Prefunding						0.00		0.00		0.00		0.00		0.00
Scheduled Principal						-3,615.85		-2,720.59		-11,537.08		-13,572.26		-52,453.39
Partial Prepayments						-5,835.14		-46,662.30		-10,115.71		-7,474.56		-83,284.22
Full Voluntary Prepayments						-0.00		-963,100.00		-640,250.00		-2,287,846.89		-6,522,181.19
Repurchases						-0.00		-0.00		-0.00		-0.00		-0.00
Liquidations						-0.00		-0.00		-0.00		-0.00		-0.00
Current						38,283,456.91		53,211,693.70		46,363,957.73		58,847,850.95		336,904,286.21







Page 12 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

PREFUNDING

SPACE INTENTIONALLY LEFT BLANK







Page 13 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

CHARACTERISTICS
CHARACTERISTICS
														Group 5
Weighted Average Coupon Original														6.11687%
Weighted Average Coupon Prior														6.11779%
Weighted Average Coupon Current														6.11972%
Weighted Average Months to Maturity Original														359
Weighted Average Months to Maturity Prior														358
Weighted Average Months to Maturity Current														357
Weighted Avg Remaining Amortization Term Original														359
Weighted Avg Remaining Amortization Term Prior														358
Weighted Avg Remaining Amortization Term Current														357
Weighted Average Seasoning Original														1.05
Weighted Average Seasoning Prior														2.00
Weighted Average Seasoning Current														3.00
CHARACTERISTICS
CHARACTERISTICS
						Group 4		Group 3		Group 2		Group 1		Total
Weighted Average Coupon Original						5.66692%		5.39596%		5.62456%		5.41131%		5.76528%
Weighted Average Coupon Prior						5.66692%		5.39588%		5.62452%		5.41276%		5.76340%
Weighted Average Coupon Current						5.66693%		5.39535%		5.62478%		5.40826%		5.76054%
Weighted Average Months to Maturity Original						359		359		359		358		359
Weighted Average Months to Maturity Prior						358		358		357		356		358
Weighted Average Months to Maturity Current						357		357		356		356		357
Weighted Avg Remaining Amortization Term Original						359		359		359		358		359
Weighted Avg Remaining Amortization Term Prior						358		358		357		356		358
Weighted Avg Remaining Amortization Term Current						357		357		356		356		357
Weighted Average Seasoning Original						0.84		0.84		1.12		1.88		1.15
Weighted Average Seasoning Prior						1.84		1.84		2.12		2.89		2.13
Weighted Average Seasoning Current						2.84		2.84		3.10		3.75		3.10





Page 14 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution






Page 15 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

ARM CHARACTERISTICS
ARM CHARACTERISTICS
														Group 5
Weighted Average Margin Original														2.75000%
Weighted Average Margin Prior														2.75000%
Weighted Average Margin Current														2.75000%
Weighted Average Max Rate Original														12.11971%
Weighted Average Max Rate Prior														12.12070%
Weighted Average Max Rate Current														12.12141%
Weighted Average Min Rate Original														0.00000%
Weighted Average Min Rate Prior														0.00000%
Weighted Average Min Rate Current														0.00000%
Weighted Average Cap Up Original														1.59185%
Weighted Average Cap Up Prior														1.59808%
Weighted Average Cap Up Current														1.60777%
Weighted Average Cap Down Original														1.59185%
Weighted Average Cap Down Prior														1.59808%
Weighted Average Cap Down Current														1.60777%

ARM CHARACTERISTICS
ARM CHARACTERISTICS
						Group 4		Group 3		Group 2		Group 1		Total
Weighted Average Margin Original						2.75339%		2.76429%		2.75000%		2.75330%		2.75318%
Weighted Average Margin Prior						2.75339%		2.75000%		2.75000%		2.75332%		2.75096%
Weighted Average Margin Current						2.75339%		2.75000%		2.75000%		2.75338%		2.75098%
Weighted Average Max Rate Original						11.66692%		11.39921%		11.62990%		11.44204%		11.77316%
Weighted Average Max Rate Prior						11.66692%		11.39588%		11.62986%		11.44374%		11.77087%
Weighted Average Max Rate Current						11.66693%		11.39535%		11.63012%		11.43977%		11.76758%
Weighted Average Min Rate Original						0.00000%		0.00000%		0.00000%		0.00000%		0.00000%
Weighted Average Min Rate Prior						0.00000%		0.00000%		0.00000%		0.00000%		0.00000%
Weighted Average Min Rate Current						0.00000%		0.00000%		0.00000%		0.00000%		0.00000%
Weighted Average Cap Up Original						1.61585%		1.66023%		1.77301%		1.63058%		1.63604%
Weighted Average Cap Up Prior						1.61584%		1.66032%		1.77298%		1.63626%		1.64013%
Weighted Average Cap Up Current						1.61586%		1.65855%		1.77277%		1.63745%		1.64455%
Weighted Average Cap Down Original						1.61585%		1.66023%		1.77301%		1.63058%		1.63604%
Weighted Average Cap Down Prior						1.61584%		1.66032%		1.77298%		1.63626%		1.64013%
Weighted Average Cap Down Current						1.61586%		1.65855%		1.77277%		1.63745%		1.64455%





Page 16 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

SERVICING FEES & ADVANCES

															Group 5




Current Servicing Fees														11,151.04
Delinquent Servicing Fees														33,493.50
TOTAL SERVICING FEES														44,644.54


Total Servicing Fees														44,644.54
Compensating Interest														-2,922.96
Delinquent Servicing Fees														-33,493.50
COLLECTED SERVICING FEES														8,228.08


Total Advanced Interest														512,757.97
Total Advanced Principal														17,273.37
Aggregate Advances with respect to this Distribution														530,031.34

SERVICING FEES & ADVANCES
SERVICING FEES & ADVANCES

							Group 4		Group 3		Group 2		Group 1		Total




Current Servicing Fees						3,841.49		5,806.18		4,510.82		5,527.11		30,836.64
Delinquent Servicing Fees						8,125.04		11,138.88		10,184.77		13,584.37		76,526.55
TOTAL SERVICING FEES						11,966.53		16,945.06		14,695.58		19,111.48		107,363.19


Total Servicing Fees						11,966.53		16,945.06		14,695.58		19,111.48		107,363.19
Compensating Interest						-0.00		-1,187.95		-88.92		-1,695.55		-5,895.39
Delinquent Servicing Fees						-8,125.04		-11,138.88		-10,184.77		-13,584.37		-76,526.55
COLLECTED SERVICING FEES						3,841.49		4,618.22		4,421.89		3,831.56		24,941.25


Total Advanced Interest						114,978.06		149,930.31		142,338.81		182,705.28		1,102,710.42
Total Advanced Principal						2,538.95		1,814.64		8,453.68		10,906.93		40,987.57
Aggregate Advances with respect to this Distribution						117,517.01		151,744.95		150,792.49		193,612.21		1,143,697.99







Page 17 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

ADDITIONAL COLLATERAL INFORMATION
														Group 5
Prepayment Interest Shortfall (PPIS)														2,922.96
Compensating Interest														-2,922.96
Net Prepayment Interest Shortfall (PPIS)														0.00
Weighted Average Net Mortgage Rate														5.554572%

ADDITIONAL COLLATERAL INFORMATION
						Group 4		Group 3		Group 2		Group 1		Total
Prepayment Interest Shortfall (PPIS)						0.00		1,187.95		88.92		1,695.55		5,895.39
Compensating Interest						-0.00		-1,187.95		-88.92		-1,695.55		-5,895.39
Net Prepayment Interest Shortfall (PPIS)						0.00		0.00		0.00		0.00		0.00
Weighted Average Net Mortgage Rate						5.286926%		5.015349%		5.224783%		5.008259%




Page 18 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Delinquency Report

	TOTAL
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				6,751,082.35		2,018,303.40		0.00		8,769,385.75
			% Balance				2.00%		0.60%		0.00%		2.60%
			# Loans				16		5		0		21
			% # Loans				1.48%		0.46%		0.00%		1.94%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		0.00		6,751,082.35		2,018,303.40		0.00		8,769,385.75
			% Balance		0.00%		2.00%		0.60%		0.00%		2.60%
			# Loans		0		16		5		0		21
			% # Loans		0.00%		1.48%		0.46%		0.00%		1.94%









Page 19 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution


	GROUP 1
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				1,391,000.00		1,341,503.40		0.00		2,732,503.40
			% Balance				2.36%		2.28%		0.00%		4.64%
			# Loans				2		2		0		4
			% # Loans				1.74%		1.74%		0.00%		3.48%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		0.00		1,391,000.00		1,341,503.40		0.00		2,732,503.40
			% Balance		0.00%		2.36%		2.28%		0.00%		4.64%
			# Loans		0		2		2		0		4
			% # Loans		0.00%		1.74%		1.74%		0.00%		3.48%










Page 20 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

	GROUP 2
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				826,069.84		0.00		0.00		826,069.84
			% Balance				1.78%		0.00%		0.00%		1.78%
			# Loans				2		0		0		2
			% # Loans				2.33%		0.00%		0.00%		2.33%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		0.00		826,069.84		0.00		0.00		826,069.84
			% Balance		0.00%		1.78%		0.00%		0.00%		1.78%
			# Loans		0		2		0		0		2
			% # Loans		0.00%		2.33%		0.00%		0.00%		2.33%










Page 21 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

	GROUP 3
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				212,720.00		0.00		0.00		212,720.00
			% Balance				0.40%		0.00%		0.00%		0.40%
			# Loans				1		0		0		1
			% # Loans				0.42%		0.00%		0.00%		0.42%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		0.00		212,720.00		0.00		0.00		212,720.00
			% Balance		0.00%		0.40%		0.00%		0.00%		0.40%
			# Loans		0		1		0		0		1
			% # Loans		0.00%		0.42%		0.00%		0.00%		0.42%










Page 22 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

	GROUP 4
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				153,800.00		0.00		0.00		153,800.00
			% Balance				0.40%		0.00%		0.00%		0.40%
			# Loans				1		0		0		1
			% # Loans				0.59%		0.00%		0.00%		0.59%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		0.00		153,800.00		0.00		0.00		153,800.00
			% Balance		0.00%		0.40%		0.00%		0.00%		0.40%
			# Loans		0		1		0		0		1
			% # Loans		0.00%		0.59%		0.00%		0.00%		0.59%










Page 23 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

	GROUP 5
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				4,167,492.51		676,800.00		0.00		4,844,292.51
			% Balance				2.97%		0.48%		0.00%		3.46%
			# Loans				10		3		0		13
			% # Loans				2.11%		0.63%		0.00%		2.75%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		0.00		4,167,492.51		676,800.00		0.00		4,844,292.51
			% Balance		0.00%		2.97%		0.48%		0.00%		3.46%
			# Loans		0		10		3		0		13
			% # Loans		0.00%		2.11%		0.63%		0.00%		2.75%









Page 24 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
REO Report
Loan Number			Original		Stated				Current		State &

														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment

Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date
SPACE INTENTIONALLY LEFT BLANK
SPACE INTENTIONALLY LEFT BLANK



TOTAL



Page 25 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Foreclosure Report
Loan Number			Original		Stated				Current		State &

														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment

Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date




TOTAL



Page 26 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Prepayment Report

VOLUNTARY PREPAYMENTS
VOLUNTARY PREPAYMENTS

															Group 5




*Current*


Number of Paid in Full Loans														10
Number of Repurchased Loans														0
Total Number of Loans Prepaid in Full														10
Curtailments Amount														13,196.51
Paid in Full Balance														2,630,984.30
Repurchased Loans Balance														0.00
Total Prepayment Amount														2,644,180.81

*Cumulative*


Number of Paid in Full Loans														26
Number of Repurchased Loans														1
Total Number of Loans Prepaid in Full														27
Paid in Full Balance														10,385,354.90
Repurchased Loans Balance														316,000.00
Curtailments Amount														23,729.52
Total Prepayment Amount														10,725,084.42

VOLUNTARY PREPAYMENTS

							Group 4		Group 3		Group 2		Group 1		Total




*Current*


Number of Paid in Full Loans						0		4		1		6		21
Number of Repurchased Loans						0		0		0		0		0
Total Number of Loans Prepaid in Full						0		4		1		6		21
Curtailments Amount						5,835.14		46,662.30		10,115.71		7,474.56		83,284.22
Paid in Full Balance						0.00		963,100.00		640,250.00		2,287,846.89		6,522,181.19
Repurchased Loans Balance						0.00		0.00		0.00		0.00		0.00
Total Prepayment Amount						5,835.14		1,009,762.30		650,365.71		2,295,321.45		6,605,465.41

*Cumulative*


Number of Paid in Full Loans						0		7		1		9		43
Number of Repurchased Loans						0		1		0		0		2
Total Number of Loans Prepaid in Full						0		8		1		9		45
Paid in Full Balance						0.00		1,776,539.48		640,250.00		3,763,741.03		16,565,885.41
Repurchased Loans Balance						0.00		280,000.00		0.00		0.00		596,000.00
Curtailments Amount						7,967.01		51,839.83		52,422.78		222,804.98		358,764.12
Total Prepayment Amount						7,967.01		2,108,379.31		692,672.78		3,986,546.01		17,520,649.53





Page 27 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution






Page 28 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

VOLUNTARY PREPAYMENTS RATES
VOLUNTARY PREPAYMENTS RATES

															Group 5



SMM														1.85%
3 Months Avg SMM														2.43%
12 Months Avg SMM														2.43%
Avg SMM Since Cut-off														2.43%


CPR														20.09%
3 Months Avg CPR														25.53%
12 Months Avg CPR														25.53%
Avg CPR Since Cut-off														25.53%


PSA														3,346.94%
3 Months Avg PSA Approximation														6,327.87%
12 Months Avg PSA Approximation														6,327.87%
Avg PSA Since Cut-off Approximation														6,327.86%

VOLUNTARY PREPAYMENTS RATES



							Group 4		Group 3		Group 2		Group 1		Total



SMM						0.02%		1.86%		1.38%		3.75%		1.92%
3 Months Avg SMM						0.01%		1.29%		0.49%		2.16%		1.68%
12 Months Avg SMM						0.01%		1.29%		0.49%		2.16%		1.68%
Avg SMM Since Cut-off						0.01%		1.29%		0.49%		2.16%		1.68%


CPR						0.18%		20.19%		15.39%		36.82%		20.78%
3 Months Avg CPR						0.08%		14.39%		5.76%		23.06%		18.35%
12 Months Avg CPR						0.08%		14.39%		5.76%		23.06%		18.35%
Avg CPR Since Cut-off						0.08%		14.39%		5.76%		23.06%		18.35%


PSA						32.22%		3,560.30%		2,480.29%		4,902.79%		3,350.53%
3 Months Avg PSA Approximation						22.67%		3,918.62%		1,363.44%		4,056.32%		4,312.58%
12 Months Avg PSA Approximation						22.67%		3,918.62%		1,363.44%		4,056.32%		4,312.58%
Avg PSA Since Cut-off Approximation						22.68%		3,918.63%		1,363.43%		4,056.31%		4,312.57%







Page 29 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution











Page 30 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

PREPAYMENT CALCULATION METHODOLOGY

	Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidations )/(Beg Principal Balance - Sched Principal)

	Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
	PSA Standard Prepayment Model: CPR/(0.002*min(30,WAS))
	PSA Standard Prepayment Model: CPR/(0.002*min(30,WAS))
	Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn)(1-SMMn+1)...*(1-SMMm)]^(1/months in period n,m)
	Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

	Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m))
	Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m)

	Weighted Average Seasoning (WAS)

	Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments, liquidations, and repurchases.
	Dates correspond to distribution dates.




Page 31 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Prepayment Detail Report
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
Loan Number			Original							Current		State &		Type Prepayment

&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment

Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date

2173533 1			386,400.00		377,826.52			02-Dec-2004		5.500%		UT - 80.00%		Paid Off - 360		03/01/2003
2173533 1			386,400.00		377,826.52			02-Dec-2004		5.500%		UT - 80.00%		Paid Off - 360		03/01/2003
3674833 1			408,800.00		408,800.00			06-Dec-2004		5.250%		CA - 80.00%		Paid Off - 360		06/01/2004
3813883 1			381,000.00		379,683.18			22-Nov-2004		5.250%		MD - 79.38%		Paid Off - 360		09/01/2004
3824631 1			335,000.00		332,614.86			16-Nov-2004		5.125%		OR - 82.72%		Paid Off - 360		06/01/2004
3850232 5			343,900.00		343,899.98			22-Nov-2004		6.500%		CA - 79.98%		Paid Off - 360		09/01/2004
3885851 3			188,000.00		188,000.00			01-Dec-2004		5.250%		CA - 80.00%		Paid Off - 360		09/01/2004
3897241 5			345,500.00		344,240.46			16-Nov-2004		6.500%		VA - 89.20%		Paid Off - 360		08/01/2004
3939020 5			123,500.00		123,500.00			01-Dec-2004		7.500%		CO - 95.00%		Paid Off - 360		10/01/2004
120055625 1			437,750.00		437,722.33			22-Nov-2004		5.625%		CA - 85.00%		Paid Off - 360		10/01/2004
120068227 2			640,250.00		640,250.00			30-Nov-2004		5.375%		CA - 65.00%		Paid Off - 360		09/01/2004
120082944 5			189,916.00		189,916.00			03-Dec-2004		6.125%		FL - 80.00%		Paid Off - 360		10/01/2004
120098008 5			165,290.00		164,960.08			03-Dec-2004		6.000%		NV - 57.00%		Paid Off - 360		10/01/2004
120120675 5			431,650.00		431,650.00			18-Nov-2004		6.000%		AZ - 80.00%		Paid Off - 360		11/01/2004
120135187 5			400,000.00		400,000.00			24-Nov-2004		6.625%		CA - 80.00%		Paid Off - 360		11/01/2004
120151613 3			240,550.00		240,550.00			17-Nov-2004		5.625%		AZ - 79.98%		Paid Off - 360		10/01/2004
120151794 3			236,550.00		236,550.00			12-Nov-2004		5.625%		AZ - 79.99%		Paid Off - 360		10/01/2004
120151832 5			259,000.00		259,000.00			01-Dec-2004		6.125%		CO - 78.01%		Paid Off - 360		10/01/2004
120171653 5			246,328.00		246,327.78			03-Dec-2004		6.250%		CA - 80.00%		Paid Off - 360		10/01/2004
120221877 1			351,200.00		351,200.00			07-Dec-2004		5.500%		CA - 80.00%		Paid Off - 360		11/01/2004
120235613 5			127,490.00		127,490.00			24-Nov-2004		6.625%		FL - 80.00%		Paid Off - 360		10/01/2004
120263580 3			298,000.00		298,000.00			30-Nov-2004		5.375%		AZ - 80.00%		Paid Off - 360		11/01/2004


TOTAL			6,536,074.00		6,522,181.19
TOTAL


Page 32 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Realized Loss Report

COLLATERAL REALIZED LOSSES



															Group 5


*Current*
*Current*



Number of Loans Liquidated														0
Collateral Principal Realized Loss/(Gain) Amount														0.00
Collateral Interest Realized Loss/(Gain) Amount														0.00
Net Liquidation Proceeds														0.00

*Cumulative*
*Cumulative*



Number of Loans Liquidated														0
Collateral Realized Loss/(Gain) Amount														0.00
Net Liquidation Proceeds														0.00





		Special Hazard Loss Coverage Amt
		Fraud Loss Coverage Amt
		Bankruptcy Loss Coverage Amt

COLLATERAL REALIZED LOSSES



							Group 4		Group 3		Group 2		Group 1		Total


*Current*
*Current*



Number of Loans Liquidated						0		0		0		0		0
Collateral Principal Realized Loss/(Gain) Amount						0.00		0.00		0.00		0.00		0.00
Collateral Interest Realized Loss/(Gain) Amount						0.00		0.00		0.00		0.00		0.00
Net Liquidation Proceeds						0.00		0.00		0.00		0.00		0.00

*Cumulative*
*Cumulative*



Number of Loans Liquidated						0		0		0		0		0
Collateral Realized Loss/(Gain) Amount						0.00		0.00		0.00		0.00		0.00
Net Liquidation Proceeds						0.00		0.00		0.00		0.00		0.00





		Special Hazard Loss Coverage Amt														3,785,276.10
		Fraud Loss Coverage Amt														4,072,000.00
		Bankruptcy Loss Coverage Amt														100,000.00







Page 33 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution





Page 34 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution


DEFAULT SPEEDS



															Group 5



MDR														0.00%
3 Months Avg MDR														0.00%
12 Months Avg MDR														0.00%
Avg MDR Since Cut-off														0.00%


CDR														0.00%
3 Months Avg CDR														0.00%
12 Months Avg CDR														0.00%
Avg CDR Since Cut-off														0.00%


SDA														0.00%
3 Months Avg SDA Approximation														0.00%
12 Months Avg SDA Approximation														0.00%
Avg SDA Since Cut-off Approximation														0.00%


Loss Severity Approximation for Current Period														0.00%
3 Months Avg Loss Severity Approximation														0.00%
12 Months Avg Loss Severity Approximation														0.00%
Avg Loss Severity Approximation Since Cut-off														0.00%

DEFAULT SPEEDS



							Group 4		Group 3		Group 2		Group 1		Total



MDR						0.00%		0.00%		0.00%		0.00%		0.00%
3 Months Avg MDR						0.00%		0.00%		0.00%		0.00%		0.00%
12 Months Avg MDR						0.00%		0.00%		0.00%		0.00%		0.00%
Avg MDR Since Cut-off						0.00%		0.00%		0.00%		0.00%		0.00%


CDR						0.00%		0.00%		0.00%		0.00%		0.00%
3 Months Avg CDR						0.00%		0.00%		0.00%		0.00%		0.00%
12 Months Avg CDR						0.00%		0.00%		0.00%		0.00%		0.00%
Avg CDR Since Cut-off						0.00%		0.00%		0.00%		0.00%		0.00%


SDA						0.00%		0.00%		0.00%		0.00%		0.00%
3 Months Avg SDA Approximation						0.00%		0.00%		0.00%		0.00%		0.00%
12 Months Avg SDA Approximation						0.00%		0.00%		0.00%		0.00%		0.00%
Avg SDA Since Cut-off Approximation						0.00%		0.00%		0.00%		0.00%		0.00%


Loss Severity Approximation for Current Period						0.00%		0.00%		0.00%		0.00%		0.00%
3 Months Avg Loss Severity Approximation						0.00%		0.00%		0.00%		0.00%		0.00%
12 Months Avg Loss Severity Approximation						0.00%		0.00%		0.00%		0.00%		0.00%
Avg Loss Severity Approximation Since Cut-off						0.00%		0.00%		0.00%		0.00%		0.00%








Page 35 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution








Page 36 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution



COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
	Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)



	Conditional Default Rate (CDR): 1-((1-MDR)^12)

	SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))

	Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn)(1-MDRn+1)...*(1-MDRm)]^(1/months in period n,m)
	Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)

	Average SDA Approximation over period between the nth month and mth month:
	AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))

	Average WASn,m: (WASn + WASn+1 +...+ WASm )/(number of months in the period n,m)
	Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

	Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)

	Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
	Dates correspond to distribution dates.




Page 37 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Realized Loss Detail Report
Loan Number			Current		State &				Prior		Realized				Cumulative
															Cumulative
&		Loan	Note		LTV at		Original		Principal		Loss/(Gain)		Realized		Realized

Loan Group		Status	Rate		Origination		Term		Balance		Revision		Loss/(Gain)		Loss/(Gain)
Loan Group		Status	Rate		Origination		Term		Balance		Revision		Loss/(Gain)		Loss/(Gain)




TOTAL



Page 38 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Triggers and Adj. Cert. Report
TRIGGER EVENTS
TRIGGER EVENTS
														Group 5
Has Optional Termination Date Reached (0=No,1=Yes)
Has Sr. Prepay Stepdown Condition Occurred (0=No,1=Yes)
Has Spl. Haz. Cov. Term. Date Occured (0=No,1=Yes)
Has Fraud Loss Coverage Term. Date Occured (0=No,1=Yes)
Has Bankrpt Loss Cov. Term. Date Occured (0=No,1=Yes)

TRIGGER EVENTS
TRIGGER EVENTS
						Group 4		Group 3		Group 2		Group 1		Total
Has Optional Termination Date Reached (0=No,1=Yes)														0
Has Sr. Credit Supp. Depletion Date Occured (0=No,1=Yes)						0		0		0		0		0
Has Spl. Haz. Cov. Term. Date Occured (0=No,1=Yes)														0
Has Fraud Loss Coverage Term. Date Occured (0=No,1=Yes)														0
Has Bankrpt Loss Cov. Term. Date Occured (0=No,1=Yes)														0



ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK





Page 39 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
														Group 5
Current Senior Percentage
Next Senior Percentage
Current Subordinate Percentage
Next Subordinate Percentage
Senior Prepayment Percentage
Next Senior Prepayment Percentage
Subordinate Prepayment Percentage
Next Subordinate Prepayment Percentage

ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
						Group 4		Group 3		Group 2		Group 1		Total
Current Senior Percentage						92.252691%		92.132521%		92.240477%		92.036071%
Next Senior Percentage						92.251510%		91.983225%		92.131631%		91.725444%
Current Subordinate Percentage						7.747309%		7.867479%		7.759523%		7.963929%
Next Subordinate Percentage						7.748490%		8.016775%		7.868369%		8.274556%
Senior Prepayment Percentage						100.000000%		100.000000%		100.000000%		100.000000%
Next Senior Prepayment Percentage						100.000000%		100.000000%		100.000000%		100.000000%
Subordinate Prepayment Percentage						0.000000%		0.000000%		0.000000%		0.000000%
Next Subordinate Prepayment Percentage						0.000000%		0.000000%		0.000000%		0.000000%




Page 40 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution
Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
														Group 5
Current Scheduled Payments														749,573.57
Current Scheduled Payments 1 Month Prior														771,181.82
Current Scheduled Payments 2 Month Prior														790,350.18
Current Scheduled Payments 3 Month Prior														0.00
Current Scheduled Payments 4 Month Prior														0.00
Current Scheduled Payments 5 Month Prior														0.00
Current Scheduled Payments 6 Month Prior														0.00
Current Scheduled Payments 7 Month Prior														0.00
Current Scheduled Payments 8 Month Prior														0.00
Current Scheduled Payments 9 Month Prior														0.00
Current Scheduled Payments 10 Month Prior														0.00
Current Scheduled Payments 11 Month Prior														0.00


Sched. Payments for 60+Day Delinquent Loans														3,513.33
Sched. Pmts - 60+Day Delinquent Loans, 1 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 2 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 3 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 4 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 5 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 6 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 7 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 8 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 9 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 10 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 11 Month Prior														0.00




Page 41 of 42
IndyMac INDX Mortgage Loan Trust 2004-AR9

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-AR9

December 27, 2004 Distribution

ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
						Group 4		Group 3		Group 2		Group 1		Total
Current Scheduled Payments						184,451.74		246,519.23		231,962.32		289,198.50		1,701,705.36
Current Scheduled Payments 1 Month Prior						184,465.91		247,836.76		231,972.00		295,782.99		1,731,239.48
Current Scheduled Payments 2 Month Prior						184,468.09		250,145.69		231,987.43		298,710.45		1,755,661.84
Current Scheduled Payments 3 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 4 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 5 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 6 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 7 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 8 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 9 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 10 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 11 Month Prior						0.00		0.00		0.00		0.00		0.00


Sched. Payments for 60+Day Delinquent Loans						0.00		0.00		0.00		7,589.85		11,103.19
Sched. Pmts - 60+Day Delinquent Loans, 1 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 2 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 3 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 4 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 5 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 6 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 7 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 8 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 9 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 10 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 11 Month Prior						0.00		0.00		0.00		0.00		0.00




Page 42 of 42

Indymac INDX Mortgage Loan Trust 2004-AR9 8-K