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 ~~June~~August 1, 2004, providing for the issuance of Residential Asset Securitization Trust Series 2004-A6A7 Mortgage Pass-Through Certificates, Series 2004-FG) (Exact name of registrant as specified in charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-116470-07 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: ~~Sep~~Dec 2728, 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 Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

External Parties

Table of Contents

Page

Seller

1. Certificate Payment Report

IndyMac Bank

2. Collection Account Report

3. Credit Enhancement Report

4. Collateral Report

Certificate Insurer(s)

5. Delinquency Report

6. REO Report

7. Foreclosure Report

8. Prepayment Report

9. Prepayment Detail Report

10. Realized Loss Report

11. Realized Loss Detail Report

Servicer(s)

12. Triggers and Adj. Cert. Report

13. Other Related Information

Underwriter(s)

Bear, Stearns & Co. Inc

Total Number of Pages

Dates

Contacts

Cut-Off Date:

August 01, 2004

Brent Hoyler

Close Date:

August 30, 2004

Administrator

First Distribution Date:

September 27, 2004

(714) 247-6322

Brent.Hoyler@db.com

Address:

1761 East St. Andrew Place, Santa Ana, CA 92705

Distribution Date:

~~September~~December 27, 2004

Factor Information:

(800) 735-7777

Record Date:

~~August~~November 3130, 2004

Main Phone Number:

(714) 247-6000

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

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

Page 1 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Certificate Payment Report

Current Period Distribution -

Prior

Current

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)

A-1

152,593,000.00

~~152~~140,~~593~~390,~~000~~424.0008

~~699~~643,~~384~~456.5811

16,~~592~~678,~~096~~422.2747

27,~~291~~321,~~480~~878.8558

0.00

~~151~~133,~~000~~712,~~903~~001.7361

A-2

7,262,600.00

33,286.92

0.00

33,286.92

0.00

7,262,600.00

A-3

44,404,400.00

4441,~~404~~353,~~400~~756.0001

7690,~~782~~633.6165

~~398~~1,~~024~~669,605.0762

~~474~~1,~~806~~760,239.6827

0.00

4439,~~006~~684,~~375~~150.9339

A-4

SR/NTL

0.00

~~215~~181,~~546~~611.3691

0.00

~~215~~181,~~546~~611.3691

0.00

A-5

SR/NTL

0.00

3,~~700~~446.3715

0.00

3,~~700~~446.3715

0.00

A-6

17,762,000.00

81,409.17

0.00

81,409.17

0.00

17,762,000.00

SR/PO

2,548,240.00

2,~~548~~534,~~240~~804.0050

0.00

218,~~241~~572.3509

0.00

2,~~545~~516,~~998~~232.6541

A-X

SR/NTL

0.00

6056,~~762~~255.6620

0.00

6056,~~762~~255.6620

0.00

A-R

SR/RES

100.00

~~100~~0.00

0.5000

~~100~~0.00

~~100~~0.5000

0.00

B-1

SUB

5,879,000.00

5,~~879~~864,~~000~~113.0032

29,~~395~~320.0057

54,~~056~~904.7689

34,~~451~~225.7646

0.00

5,~~873~~859,~~943~~208.2443

B-2

SUB

1,646,000.00

1,~~646~~641,~~000~~832.0003

8,~~230~~209.0016

1,~~415~~373.7927

9,~~645~~582.7943

0.00

1,~~644~~640,~~584~~458.2176

B-3

SUB

941,000.00

~~941~~938,~~000~~617.0022

4,~~705~~693.0009

~~809~~785.3908

5,~~514~~478.3917

0.00

~~940~~937,~~190~~832.6114

B-4

SUB

940,000.00

~~940~~937,~~000~~619.0076

4,~~700~~688.0010

~~808~~784.5325

5,~~508~~472.5335

0.00

~~939~~936,~~191~~835.4751

B-5

SUB

353,000.00

~~353~~352,~~000~~106.0014

1,~~765~~760.0053

~~303~~294.6351

2,~~068~~055.6304

0.00

~~352~~351,~~696~~811.3763

B-6

SUB

824,262.00

~~824~~822,~~262~~174.0085

4,~~121~~110.3187

~~708~~687.9667

4,~~830~~798.2754

0.00

~~823~~821,~~553~~487.0418

100.00

0100.00

0.00

0100.00

Total

235,153,702.00

~~235~~219,~~153~~860,~~602~~147.0091

1,~~223~~142,~~789~~881.4843

28,~~001~~375,~~564~~429.7585

39,~~225~~518,~~354~~311.2328

0.00

~~233~~211,~~152~~484,~~037~~718.2506

Interest Accrual Detail Current Period Factor Information per $1,0000 of Original Face-

Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face-

Orig. Principal

Prior

Current

Period

(with Notional)

Principal

Total

Principal

Class

Starting

Ending

Method

Cusip

Balance

Interest

Principal

Distribution

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

A-1

0811/01/04

0811/30/04

F-30/360

45660NU86

152,593,000.00

~~1,000~~920.~~000000~~031876

4.~~583333~~216813

1043.~~433613~~766244

1547.~~016946~~983057

~~989~~876.~~566387~~265632

A-2

0811/01/04

0811/30/04

F-30/360

45660NU94

7,262,600.00

1,000.000000

4.583334

0.000000

4.583334

1,000.000000

A-3

0811/01/04

0811/30/04

F-30/360

45660NV28

44,404,400.00

~~1,000~~931.~~000000~~298610

12.~~729167~~041096

837.~~963618~~600004

1039.~~692784~~641100

~~991~~893.~~036382~~698606

A-4

0811/25/04

0912/24/04

A-30/360

45660NV36

44,404,400.00

~~1,000~~931.~~000000~~298610

4.~~854167~~089953

0.000000

4.~~854167~~089953

~~991~~893.~~036382~~698606

A-5

0811/25/04

0912/24/04

A-30/360

45660NV44

4,440,440.00

~~1,000~~931.~~000000~~298610

0.~~833334~~776083

0.000000

0.~~833334~~776083

~~991~~893.~~036382~~698606

A-6

0811/25/04

0912/24/04

F-30/360

45660NV51

17,762,000.00

1,000.000000

4.583334

0.000000

4.583334

1,000.000000

0811/01/04

0811/30/04

F-30/360

45660NV69

2,548,240.00

~~1,000~~994.~~000000~~727537

0.000000

07.~~879568~~288203

~~999~~987.~~120432~~439335

A-X

0811/01/04

0811/30/04

A-30/360

45660NV77

168,588,334.00

~~1,000~~921.~~000000~~184594

0.~~360420~~333684

0.000000

0.~~360420~~333684

~~988~~874.~~475900~~043017

A-R

0811/01/04

0811/30/04

F-30/360

45660NV85

100.00

~~1,000~~0.000000

50.000000

~~1,000~~0.000000

~~1,005~~0.000000

0.000000

B-1

0811/01/04

0811/30/04

F-30/360

45660NV93

5,879,000.00

~~1,000~~997.~~000000~~467821

54.~~000000~~987340

0.~~860139~~834307

5.~~860139~~821647

~~999~~996.~~139861~~633514

B-2

0811/01/04

0811/30/04

F-30/360

45660NW27

1,646,000.00

~~1,000~~997.~~000000~~467819

54.~~000000~~987339

0.~~860140~~834307

5.~~860140~~821646

~~999~~996.~~139860~~633512

B-3

0811/01/04

0811/30/04

F-30/360

45660NW35

941,000.00

~~1,000~~997.~~000000~~467821

54.~~000000~~987343

0.~~860138~~834304

5.~~860138~~821647

~~999~~996.~~139862~~633518

B-4

0811/01/04

0811/30/04

F-30/360

45660N2B0

940,000.00

~~1,000~~997.~~000000~~467830

54.~~000000~~987340

0.~~860138~~834309

5.~~860138~~821649

~~999~~996.~~139862~~633521

B-5

0811/01/04

0811/30/04

F-30/360

45660N2D6

353,000.00

~~1,000~~997.~~000000~~467819

54.~~000000~~987337

0.~~860142~~834306

5.~~860142~~821643

~~999~~996.~~139858~~633513

B-6

0811/01/04

0811/30/04

F-30/360

45660N2F1

824,262.00

~~1,000~~997.~~000000~~467856

54.~~000000~~987334

0.~~860115~~834286

5.~~860115~~821620

~~999~~996.~~139885~~633570

0811/01/04

0811/30/04

F-30/360

IN04071P1

100.00

01,000.000000

0.000000

01,000.000000

Page 2 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Distribution to Date -

Current

Original

Unscheduled

Scheduled

Total

Realized

Deferred

Principal

Class

Face Value

Interest

Principal

Distribution

Loss

Interest

Balance

(1)

(2)

(3)

(4)

(5)=(3)+(4)

(6)=(2)+(5)

(7)

(8)

(9)=(1)-(5)-(7)+(8)

A-1

152,593,000.00

~~699~~2,~~384~~704,292.5867

118,~~439~~299,~~328~~324.1134

~~152~~581,~~768~~674.1605

118,~~592~~880,~~096~~998.2739

221,~~291~~585,~~480~~291.8506

0.00

~~151~~133,~~000~~712,~~903~~001.7361

A-2

7,262,600.00

33133,~~286~~147.9268

0.00

33133,~~286~~147.9268

0.00

7,262,600.00

A-3

44,404,400.00

76336,~~782~~305.6129

~~359~~4,~~832~~574,831.0310

38145,~~192~~418.0451

~~398~~4,~~024~~720,249.0761

~~474~~5,~~806~~056,554.6890

0.00

4439,~~006~~684,~~375~~150.9339

A-4

0.00

~~215~~799,~~546~~526.3691

0.00

~~215~~799,~~546~~526.3691

0.00

A-5

0.00

314,~~700~~377.3763

0.00

314,~~700~~377.3763

0.00

A-6

17,762,000.00

81325,~~409~~636.1768

0.00

81325,~~409~~636.1768

0.00

17,762,000.00

2,548,240.00

0.00

022,211.0034

29,~~241~~796.3525

232,~~241~~007.3559

0.00

2,~~545~~516,~~998~~232.6541

A-X

0.00

60235,~~762~~599.66

0.00

60235,~~762~~599.66

0.00

A-R

100.00

0.50

90.40

9.60

100.00

100.50

0.00

B-1

5,879,000.00

29117,~~395~~430.0042

0.00

519,~~056~~791.7657

34137,~~451~~221.7699

0.00

5,~~873~~859,~~943~~208.2443

B-2

1,646,000.00

832,~~230~~878.0012

0.00

15,~~415~~541.7924

938,~~645~~419.7936

0.00

1,~~644~~640,~~584~~458.2176

B-3

941,000.00

418,~~705~~796.0006

0.00

~~809~~3,167.3986

521,~~514~~963.3992

0.00

~~940~~937,~~190~~832.6114

B-4

940,000.00

418,~~700~~776.0009

0.00

~~808~~3,164.5349

521,~~508~~940.5358

0.00

~~939~~936,~~191~~835.4751

B-5

353,000.00

17,~~765~~051.0002

0.00

~~303~~1,188.6337

28,~~068~~239.6339

0.00

~~352~~351,~~696~~811.3763

B-6

824,262.00

416,~~121~~464.3127

0.00

~~708~~2,774.9682

419,~~830~~239.2709

0.00

~~823~~821,~~553~~487.0418

100.00

016,297.0050

0.00

016,297.0050

0.00

0100.00

Total

235,153,702.00

14,~~223~~776,~~789~~580.4850

122,~~799~~896,~~250~~457.5418

~~202~~772,~~314~~526.2176

223,~~001~~668,~~564~~983.7594

328,~~225~~445,~~354~~564.2344

0.00

~~233~~211,~~152~~484,~~037~~718.2506

Interest Detail -

Pass

Prior Principal

Non-

Prior

Unscheduled

Paid or

Current

Through

(with Notional)

Accrued

Supported

Unpaid

Interest

Optimal

Deferred

Unpaid

Class

Rate

Balance

Interest

Interest SF

Interest

Adjustment

Interest

(1)

(2)

(3)

(4)

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

(6)

(7)=(5)-(6)

A-1

5.50000%

~~152~~140,~~593~~390,~~000~~424.0008

~~699~~643,~~384~~456.5811

0.00

~~699~~643,~~384~~456.5811

0.00

A-2

5.50000%

7,262,600.00

33,286.92

0.00

33,286.92

0.00

A-3

2.~~07500~~63000%

4441,~~404~~353,~~400~~756.0001

7690,~~782~~633.6165

0.00

7690,~~782~~633.6165

0.00

A-4

5.~~82500~~27000%

4441,~~404~~353,~~400~~756.0001

~~215~~181,~~546~~611.3691

0.00

~~215~~181,~~546~~611.3691

0.00

A-5

1.00000%

4,~~440~~135,~~440~~375.0060

3,~~700~~446.3715

0.00

3,~~700~~446.3715

0.00

A-6

5.50000%

17,762,000.00

81,409.17

0.00

81,409.17

0.00

0.00000%

2,~~548~~534,~~240~~804.0050

0.00

A-X

0.~~43250~~43468%

~~168~~155,~~588~~300,~~334~~976.0005

6056,~~762~~255.6620

0.00

6056,~~762~~255.6620

0.00

A-R

60.00000%

~~100~~0.00

0.5000

0.00

0.5000

0.00

B-1

6.00000%

5,~~879~~864,~~000~~113.0032

29,~~395~~320.0057

0.00

29,~~395~~320.0057

0.00

B-2

6.00000%

1,~~646~~641,~~000~~832.0003

8,~~230~~209.0016

0.00

8,~~230~~209.0016

0.00

B-3

6.00000%

~~941~~938,~~000~~617.0022

4,~~705~~693.0009

0.00

4,~~705~~693.0009

0.00

B-4

6.00000%

~~940~~937,~~000~~619.0076

4,~~700~~688.0010

0.00

4,~~700~~688.0010

0.00

B-5

6.00000%

~~353~~352,~~000~~106.0014

1,~~765~~760.0053

0.00

1,~~765~~760.0053

0.00

B-6

6.00000%

~~824~~822,~~262~~174.0085

4,~~121~~110.3187

0.00

4,~~121~~110.3187

0.00

0.00000%

0100.00

0.00

Total

~~452~~420,~~586~~650,~~776~~255.0057

1,~~223~~142,~~789~~881.4843

0.00

1,~~223~~142,~~789~~881.4843

0.00

Page 3 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Collection Account Report

SUMMARY

Total

Principal Collections

28,~~001~~375,~~564~~429.7686

Principal Withrawals

0.00

Principal Other Accounts

0.00

TOTAL NET PRINCIPAL

28,~~001~~375,~~564~~429.7686

Interest Collections

1,~~248~~157,~~232~~351.4021

Interest Withdrawals

-0.00

Interest Other Accounts

0.00

Interest Fees

-2414,~~442~~469.9379

TOTAL NET INTEREST

1,~~223~~142,~~789~~881.4742

TOTAL AVAILABLE FUNDS FOR DISTRIBUTION

39,~~225~~518,~~354~~311.2328

PRINCIPAL - COLLECTIONS

Total

Scheduled Principal Received

~~202~~184,~~573~~308.1687

Curtailments

~~-545~~30,228.6144

Prepayments In Full

18,~~799~~160,~~537~~892.2155

Repurchased/Substitutions

0.00

Liquidations

0.00

Insurance Principal

0.00

Other Additional Principal

0.00

Delinquent Principal

-~~123~~146,~~774~~698.2756

Realized Losses

-0.00

Advanced Principal

~~123~~146,~~774~~698.2756

TOTAL PRINCIPAL COLLECTED

28,~~001~~375,~~564~~429.7686

PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK

PRINCIPAL - OTHER ACCOUNTS

Total

TOTAL PRINCIPAL OTHER ACCOUNTS

0.00

Page 4 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

INTEREST - COLLECTIONS

Total

Scheduled Interest

1,~~284~~199,~~573~~576.7398

Repurchased/Substitution Interest

0.00

Liquidation Interest

0.00

Insurance Interest

0.00

Other Additional Interest

0.00

Prepayment Interest Shortfalls

-~~142~~14,803.2430

Delinquent Interest

-~~790~~925,~~685~~166.4658

Compensating Interest

~~142~~14,803.2430

Civil Relief Act Shortfalls

-0.00

Interest Advanced

~~754~~882,~~344~~940.1382

TOTAL INTEREST COLLECTED

1,~~248~~157,~~232~~351.4021

INTEREST - WITHDRAWALS

Total

TOTAL INTEREST WITHDRAWALS

0.00

INTEREST - OTHER ACCOUNTS

Total

Prepayment Charges

0.00

TOTAL INTEREST OTHER ACCOUNTS

0.00

INTEREST - FEES

Total

Current Servicing Fees

2212,~~483~~637.3263

Trustee Fees

1,~~959~~832.6116

TOTAL INTEREST FEES

2414,~~442~~469.9379

Page 5 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Credit Enhancement Report

ACCOUNTS

SPACE INTENTIONALLY LEFT BLANK

INSURANCE

SPACE INTENTIONALLY LEFT BLANK

STRUCTURAL FEATURES

SPACE INTENTIONALLY LEFT BLANK

Page 6 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Collateral Report

COLLATERAL

Total

Loan Count:

Original

597

Prior

~~597~~563

Prefunding

Scheduled Paid Offs

-0

Full Voluntary Prepayments

-512

Repurchases

-0

Liquidations

-0

Current

~~592~~551

Principal Balance:

Original

235,153,602.83

Prior

~~235~~219,~~153~~860,~~602~~048.8370

Prefunding

0.00

Scheduled Principal

-~~202~~184,~~573~~308.1687

Partial Prepayments

~~(545~~-30,228.~~61)~~44

Full Voluntary Prepayments

-18,~~799~~160,~~537~~892.2155

Repurchases

-0.00

Liquidations

-0.00

Current

~~233~~211,~~152~~484,~~038~~618.0784

PREFUNDING

SPACE INTENTIONALLY LEFT BLANK

Page 7 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

CHARACTERISTICS

Total

Weighted Average Coupon Original

6.55524%

Weighted Average Coupon Prior

6.~~55524~~55115%

Weighted Average Coupon Current

6.~~55524~~54731%

Weighted Average Months to Maturity Original

357

Weighted Average Months to Maturity Prior

~~357~~355

Weighted Average Months to Maturity Current

~~357~~354

Weighted Avg Remaining Amortization Term Original

357

Weighted Avg Remaining Amortization Term Prior

~~357~~355

Weighted Avg Remaining Amortization Term Current

~~357~~354

Weighted Average Seasoning Original

1.91

Weighted Average Seasoning Prior

13.9188

Weighted Average Seasoning Current

14.9189

Page 8 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

ARM CHARACTERISTICS

Total

Weighted Average Margin Original

0.00000%

Weighted Average Margin Prior

0.00000%

Weighted Average Margin Current

0.00000%

Weighted Average Max Rate Original

0.00000%

Weighted Average Max Rate Prior

0.00000%

Weighted Average Max Rate Current

0.00000%

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

0.00000%

Weighted Average Cap Up Prior

0.00000%

Weighted Average Cap Up Current

0.00000%

Weighted Average Cap Down Original

0.00000%

Weighted Average Cap Down Prior

0.00000%

Weighted Average Cap Down Current

0.00000%

SERVICING FEES & ADVANCES

Total

Current Servicing Fees

2212,~~483~~637.3263

Delinquent Servicing Fees

3642,~~341~~225.3377

TOTAL SERVICING FEES

5854,~~824~~863.6540

Total Servicing Fees

5854,~~824~~863.6540

Compensating Interest

-~~142~~14,803.2430

Delinquent Servicing Fees

-3642,~~341~~225.3377

COLLECTED SERVICING FEES

22-2,~~341~~165.0867

Total Advaced Interest

~~754~~882,~~344~~940.1382

Total Advaced Principal

~~123~~146,~~774~~698.2756

Aggregate Advances with respect to this Distribution

~~878~~1,~~118~~029,639.4038

ADDITIONAL COLLATERAL INFORMATION

Total

Prepayment Interest Shortfall (PPIS)

~~142~~14,803.2430

Compensating Interest

-~~142~~14,803.2430

Net Prepayment Interest Shortfall (PPIS)

0.00

Weighted Average Net Mortgage Rate

6.~~245056~~237867%

LIBOR for the Current Period

12.~~615000~~180000%

LIBOR for the Next Period

12.~~840000~~417500%

Page 9 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Delinquency Report

TOTAL

< 1 PAYMENT

1 PAYMENT

2 PAYMENTS

3+ PAYMENTS

TOTAL

DELINQUENT

Balance

4817,~~872,359~~553.3474

01,288,569.0088

0688,443.0097

42,~~872~~794,~~359~~567.3459

% Balance

20.0939%

0.0061%

0.0033%

21.0932%

# Loans

123

127

% # Loans

20.0354%

0.0054%

0.0018%

21.0327%

FORECLOSURE

Balance

0.00

~~222,203~~0.7200

0.00

0221,691.0035

~~222~~221,~~203~~691.7235

% Balance

0.00%

0.1000%

0.00%

0.0010%

0.10%

# Loans

% # Loans

0.00%

0.1700%

0.00%

0.0018%

0.1718%

BANKRUPTCY

Balance

0.00

% Balance

0.00%

# Loans

% # Loans

0.00%

REO

Balance

0.00

% Balance

0.00%

# Loans

% # Loans

0.00%

TOTAL

Balance

0.00

5817,~~094,563~~553.0674

01,288,569.0088

0910,135.0032

53,~~094~~016,~~563~~258.0694

% Balance

0.00%

20.1939%

0.0061%

0.0043%

21.1943%

# Loans

133

138

% # Loans

0.00%

20.2054%

0.0054%

0.0036%

21.2045%

Page 10 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

REO Report

Loan Number

Original

Stated

Current

State &

First

Principal

Paid to

Note

LTV at

Original

Payment

Loan Group

Balance

Date

Rate

Origination

Term

Date

SPACE INTENTIONALLY LEFT BLANK

TOTAL

Page 11 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Foreclosure Report

Loan Number

Original

Stated

Current

State &

First

Principal

Paid to

Note

LTV at

Original

Payment

Loan Group

Balance

Date

Rate

Origination

Term

Date

3154357 1

224,000.00

~~222~~221,~~203~~691.7235

01-~~Jul~~Aug-2004

7.750%

MA - 64.93%

360

01-Oct-2003

TOTAL

224,000.00

~~222~~221,~~203~~691.7235

Page 12 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Prepayment Report

VOLUNTARY PREPAYMENTS

Total

Current

Number of Paid in Full Loans

512

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

512

Curtailments Amount

~~-545~~30,228.6144

Paid in Full Balance

18,~~799~~160,~~537~~892.2155

Repurchased Loans Balance

0.00

Total Prepayment Amount

18,~~798~~191,~~991~~120.6099

Cumulative

Number of Paid in Full Loans

546

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

546

Paid in Full Balance

122,~~799~~823,~~537~~760.2102

Repurchased Loans Balance

0.00

Curtailments Amount

~~-545~~72,438.6123

Total Prepayment Amount

122,~~798~~896,~~991~~198.6025

Page 13 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

VOLUNTARY PREPAYMENTS RATES

Total

SMM

03.7773%

3 Months Avg SMM

03.7712%

12 Months Avg SMM

02.7754%

Avg SMM Since Cut-off

02.7754%

CPR

836.8162%

3 Months Avg CPR

831.8162%

12 Months Avg CPR

826.8152%

Avg CPR Since Cut-off

826.8152%

PSA

23,~~307~~747.2967%

3 Months Avg PSA Approximation

24,~~307~~073.3044%

12 Months Avg PSA Approximation

23,~~307~~913.3016%

Avg PSA Since Cut-off Approximation

23,~~307~~913.3016%

Page 14 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

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))

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 15 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

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

Principal

Prepayment

Note

LTV at

Payment

Loan Group

Status

Balance

Amount

Date

Rate

Origination

Original Term

Date

3787017 1

40,000.00

39,896.10

30-Aug-2004

6.750%

GA - 27.21%

Paid Off - 360

01-Jun-2004

3594190 1

1,930,000.00

1,923,922.87

16-Nov-2004

7.250%

CA - 64.33%

Paid Off - 360

08/01/2004

3856526 1

698,500.00

697,883.73

14-Sep-2004

6.625%

CA - 69.99%

Paid Off - 360

01-Aug-2004

3743995 1

505,000.00

503,246.10

01-Dec-2004

6.750%

CA - 67.33%

Paid Off - 360

08/01/2004

3949065 1

138,000.00

137,894.99

26-Aug-2004

7.375%

MA - 57.50%

Paid Off - 360

01-Aug-2004

3787061 1

350,000.00

18-Nov-2004

6.000%

CA - 61.40%

Paid Off - 360

05/01/2004

120051396 1

389,500.00

388,810.81

07-Sep-2004

6.625%

CA - 95.00%

Paid Off - 360

01-Jul-2004

3793563 1

377,000.00

375,658.43

18-Nov-2004

6.625%

MD - 56.27%

Paid Off - 360

08/01/2004

120051892 1

536,000.00

535,051.58

08-Sep-2004

6.625%

CA - 80.00%

Paid Off - 360

01-Jul-2004

3808202 1

686,000.00

678,666.56

18-Nov-2004

7.000%

CA - 70.00%

Paid Off - 360

08/01/2004

TOTAL

1,802,000.00

1,799,537.21

3929437 1

364,800.00

363,875.28

01-Dec-2004

6.875%

CA - 76.80%

Paid Off - 360

09/01/2004

3946675 1

596,000.00

594,374.84

03-Dec-2004

6.500%

CA - 80.00%

Paid Off - 360

09/01/2004

3952398 1

475,000.00

473,350.28

23-Nov-2004

6.750%

CA - 49.48%

Paid Off - 360

08/01/2004

120002045 1

375,000.00

372,174.32

30-Nov-2004

7.250%

CA - 59.06%

Paid Off - 240

08/01/2004

120006510 1

147,000.00

146,645.22

07-Dec-2004

7.125%

TN - 71.05%

Paid Off - 360

09/01/2004

120066363 1

476,000.00

475,184.03

23-Nov-2004

7.000%

UT - 77.71%

Paid Off - 360

10/01/2004

120079368 1

1,909,000.00

1,903,794.62

17-Nov-2004

6.500%

CA - 68.18%

Paid Off - 360

09/01/2004

TOTAL

8,190,800.00

8,160,892.55

Page 16 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES

Total

Current

Number of Loans Liquidated

Collateral Principal Realized Loss/(Gain) Amount

~~0.00~~

Collateral Interest Realized Loss/(Gain) Amount

~~0.00~~

Net Liquidation Proceeds

~~0.00~~

Cumulative

Number of Loans Liquidated

Collateral Realized Loss/(Gain) Amount

~~0.00~~

Net Liquidation Proceeds

~~0.00~~

Special Hazard Loss Coverage Amt

~~3,856,988.00~~

Fraud Loss Coverage Amt

~~2,351,536.00~~

Bankrupt Loss Coverage Amt

~~100,000.00~~

Class B-1 Writedown Amount

~~0.00~~

Class B-2 Writedown Amount

~~0.00~~

Class B-3 Writedown Amount

~~0.00~~

Class B-4 Writedown Amount

~~0.00~~

Class B-5 Writedown Amount

~~0.00~~

Class B-6 Writedown Amount

~~0.00~~

Page 17 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

DEFAULT SPEEDS

Total

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%~~

Page 18 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

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 19 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Realized Loss Detail Report

Loan Number

~~Original~~Current

~~Prior~~State &

~~Current~~Prior

~~State &~~Realized

Cumulative

First

Loan

Note

LTV at

Original

Principal

Loss/(Gain)

Realized

Principal

Realized

Note

LTV at

Original

Payment

Loan Group

Status

Rate

Origination

Term

Balance

Revision

Loss/(Gain)

Loan Group

Balance

Loss/(Gain)

Rate

Origination

Term

Date

SPACE INTENTIONALLY LEFT BLANK

TOTAL

Page 20 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Triggers and Adj. Cert. Report

TRIGGER EVENTS

Total

Has Optional Termination Date Reached (0=No,1=Yes)

Has Sr. Prepay Stepdown Condition Occurred (0=No,1=Yes)

Has Sr. Credit Supp. Depletion Date Occured (0=No,1=Yes)

Have all Prepayment Penalties Expired? (0=No,1=Yes)

Has Special Haz. Cov. Term Date Occured (0=No,1=Yes)

Has Fraud Loss Coverage Term Date Occured (0=No,1=Yes)

Has BK Loss Cov. Term Date Occured (0=No,1=Yes)

ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK

ADDITIONAL INFORMATION

Total

Current Senior Percentage

~~95.450121%~~

Next Senior Percentage

~~95.414622%~~

Current Subordinate Percentage

~~4.549879%~~

Next Subordinate Percentage

~~4.585378%~~

Senior Prepayment Percentage

~~100.000000%~~

Next Senior Prepayment Percentage

~~100.000000%~~

Subordinate Prepayment Percentage

~~0.000000%~~

Next Subordinate Prepayment Percentage

~~0.000000%~~

Page 21 of 22

IndyMac Residential Asset Securitization Trust 2004-A7

Collateralized Asset-Backed Bonds

REMIC 2004-A7

2004-A7

September 27, 2004 Distribution

December 27, 2004 Distribution

Other Related Information

ADDITIONAL INFORMATION

Total

Current Scheduled Payments

~~1,487,146.89~~

Current Scheduled Payments 1 Month Prior

~~0.00~~

Current Scheduled Payments 2 Month Prior

~~0.00~~

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~~

Delinquent 60+ Scheduled Payments

~~1,604.76~~

Delinq. 60+ Sched. Pmnts, 1 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 2 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 3 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 4 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 5 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 6 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 7 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 8 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 9 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 10 Month Prior

~~0.00~~

Delinq. 60+ Sched. Pmnts, 11 Month Prior

~~0.00~~

Variable Rate Certificates - Next PTR Details:

Next Period Pass Through Rate - Class A-3

~~2.290000%~~

Next Period Pass Through Rate - Class A-4

~~5.610000%~~

Next Period Pass Through Rate - Class A-5

~~1.000000%~~

Next Period Pass Through Rate - Class A-X

~~0.507500%~~

Page 22 of 22

Filing Compare · IndyMac MBS, Inc. Residential Asset Securitization Trust 2004-A7