UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K Current Report Pursuant To Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): ~~August~~October 25, 2005 (Date of earliest event reported) IndyMac MBS Inc (as Depositor under the Pooling and Servicing Agreement, dated as August 1, 2003, providing for the issuance of IndyMac MBS, Inc. Residential Asset- Securitization Trust Series 2003-A9 Mortgage Pass-Through Certificates Series 2003-I. (Exact name of registrant as specified in charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-102888-08 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 ~~August~~October 25, 2005. 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: ~~Aug~~Oct 2628, 2005 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~August~~October 25, 2005.

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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

IndyMac Bank

13. Other Related Information

Underwriter(s)

Greenwich Capital Markets

Total Number of Pages

Dates

Contacts

Cut-Off Date:

July 01, 2003

Brent Hoyler

Close Date:

July 28, 2003

Administrator

First Distribution Date:

August 25, 2003

(714) 247-6322

Brent.Hoyler@db.com

Address:

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

Distribution Date:

~~August~~October 25, 2005

Factor Information:

(800) 735-7777

Record Date:

~~July~~September 2930, 2005

Main Phone Number:

(714) 247-6000

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

Page 1 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Certificate Payment Report

Current Period Distribution - Senior Certificates

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

AD,AS

35,000,000.00

1918,~~588~~335,~~465~~076.3684

6561,~~294~~116.8993

~~763~~756,~~603~~658.7381

~~828~~817,~~898~~775.6274

0.00

1817,~~824~~578,~~861~~418.6303

A-2

Z,AS

3,175,425.00

3,~~439~~462,~~439~~407.2303

0.00

11,~~464~~541.8036

3,~~450~~473,~~904~~948.0339

A-3

FLT,AS

108,612,255.00

6157,~~784~~976,~~417~~902.1782

~~206~~211,~~462~~615.9370

2,~~321~~299,~~174~~954.3393

2,~~527~~511,~~637~~570.2663

0.00

5955,~~463~~676,~~242~~947.8489

A-4

IO,INV,NTL

0.00

~~205~~174,~~433~~897.1900

0.00

~~205~~174,~~433~~897.1900

0.00

A-5

AD,TAC,AS

80,000,000.00

4946,~~197~~049,~~614~~653.7578

~~163~~153,~~992~~498.0585

1,~~917~~900,~~836~~394.9133

2,~~081~~053,~~828~~893.9618

0.00

4744,~~279~~149,~~777~~259.8445

A-6

Z,SUP,AD

12,845,000.00

0.00

A-7

AD,TAC,AS

50,000,000.00

3028,~~748~~781,~~509~~033.2769

8983,~~683~~944.1669

1,~~198~~187,~~648~~746.0543

1,~~288~~271,~~331~~691.2112

0.00

2927,~~549~~593,~~861~~287.2226

A-8

IO,NTL

0.00

1211,~~811~~992.8810

0.00

1211,~~811~~992.8810

0.00

PO,RSTP

112,246.00

8077,~~786~~607.4398

0.00

~~2,198~~625.1769

0.00

7876,~~588~~982.2629

A-X

IO,CSTR,NTL

0.00

2625,~~116~~193.7986

0.00

2625,~~116~~193.7986

0.00

R,AS

100.00

0.00

B-1

SUB,NAS

7,585,000.00

7,~~054~~037,~~130~~656.3839

32,~~331~~255.4493

8,~~161~~254.5376

40,~~492~~510.9769

0.00

7,~~045~~029,~~968~~401.8563

B-2

SUB,NAS

2,275,500.00

2,~~116~~111,~~239~~296.1191

9,~~699~~676.4378

2,~~448~~476.4643

12,~~147~~153.8921

0.00

2,~~113~~108,~~790~~820.6548

B-3

SUB,NAS

1,517,000.00

1,~~410~~407,~~826~~531.0726

6,~~466~~451.2919

1,~~632~~650.3196

8,~~098~~102.6015

0.00

1,~~409~~405,~~193~~880.7630

B-4

SUB,NAS

758,500.00

~~705~~703,~~413~~765.0261

3,~~233~~225.1560

~~816~~825.1648

4,~~049~~051.3108

0.00

~~704~~702,~~596~~940.8613

B-5

SUB,NAS

303,400.00

~~282~~281,~~165~~506.2023

1,~~293~~290.2624

~~326~~330.4720

1,~~619~~620.7344

0.00

281,~~838~~176.7303

B-6

SUB,NAS

1,213,601.00

~~939~~937,~~546~~110.3149

4,~~306~~295.2609

1,~~087~~099.0013

5,~~393~~394.2622

~~242~~0.0001

0.00

~~938~~936,~~217~~011.3135

SUB

100.00

229,~~879~~665.3868

0.00

229,~~879~~665.3868

0.00

100.00

Total

303,398,127.00

~~177~~167,~~347~~161,~~652~~649.3003

~~850~~789,~~004~~119.1064

6,~~217~~160,~~933~~017.1215

76,~~067~~949,~~937~~136.2279

~~242~~0.0001

11,~~464~~541.8036

~~171~~161,~~140~~013,~~941~~173.9823

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

0709/01/05

0709/30/05

F-30/360

45660NSW6

35,000,000.00

~~559~~523.~~670439~~859338

1.~~865568~~746198

21.~~817249~~618823

23.~~682818~~365021

~~537~~502.~~853189~~240515

A-2

0709/01/05

0709/30/05

F-30/360

45660NSX4

3,175,425.00

1,~~083~~090.~~142959~~375943

0.000000

1,~~086~~094.~~753436~~010531

A-3

0709/25/05

0810/24/05

A-30/360

45660NSY2

108,612,255.00

~~568~~533.~~853093~~797064

1.~~900917~~948359

21.~~371201~~175833

23.~~272118~~124192

~~547~~512.~~481892~~621231

A-4

0709/25/05

0810/24/05

A-30/360

45660NSZ9

108,612,255.00

~~568~~533.~~853093~~797064

1.~~891437~~610288

0.000000

1.~~891437~~610288

~~547~~512.~~481892~~621231

A-5

0709/01/05

0709/30/05

F-30/360

45660NTA3

80,000,000.00

~~614~~575.~~970184~~620672

21.~~049901~~918736

23.~~972961~~754929

2625.~~022862~~673665

~~590~~551.~~997223~~865743

A-6

0709/01/05

0709/30/05

F-30/360

45660NTB1

12,845,000.00

0.000000

A-7

0709/01/05

0709/30/05

F-30/360

45660NTC9

50,000,000.00

~~614~~575.~~970185~~620674

1.~~793663~~678894

23.~~972961~~754929

25.~~766624~~433822

~~590~~551.~~997224~~865745

A-8

0709/01/05

0709/30/05

F-30/360

45660NTD7

50,000,000.00

~~614~~575.~~970185~~620674

0.~~256238~~239842

0.000000

0.~~256238~~239842

~~590~~551.~~997224~~865745

0709/01/05

0709/30/05

F-30/360

45660NTE5

112,246.00

~~719~~691.~~726583~~409761

0.000000

195.~~583504~~574274

~~700~~685.~~143079~~835486

A-X

0709/01/05

0709/30/05

A-30/360

45660NTF2

221,083,608.00

~~534~~498.~~205842~~675657

0.~~118131~~113956

0.000000

0.~~118131~~113956

~~513~~472.~~423115~~940405

0709/01/05

0709/30/05

45660NTG0

100.00

0.000000

B-1

0709/01/05

0709/30/05

F-30/360

45660NTH8

7,585,000.00

~~930~~927.~~010597~~838680

4.~~262550~~252595

1.~~076009~~088301

5.~~338559~~340895

~~928~~926.~~934588~~750380

B-2

0709/01/05

0709/30/05

F-30/360

45660NTJ4

2,275,500.00

~~930~~927.~~010595~~838677

4.~~262549~~252595

1.~~076010~~088301

5.~~338559~~340897

~~928~~926.~~934586~~750376

B-3

0709/01/05

0709/30/05

F-30/360

45660NTK1

1,517,000.00

~~930~~927.~~010593~~838668

4.~~262551~~252597

1.~~076012~~088306

5.~~338563~~340903

~~928~~926.~~934581~~750363

B-4

0709/01/05

0709/30/05

F-30/360

758,500.00

~~930~~927.~~010574~~838642

4.~~262558~~252604

1.~~076018~~088306

5.~~338576~~340910

~~928~~926.~~934555~~750336

B-5

0709/01/05

0709/30/05

F-30/360

303,400.00

~~930~~927.~~010547~~838596

4.~~262558~~252604

1.~~076038~~088332

5.~~338596~~340936

~~928~~926.~~934509~~750264

B-6

0709/01/05

0709/30/05

F-30/360

1,213,601.00

~~774~~772.~~180567~~173466

3.~~548333~~539129

0.~~895682~~905677

4.~~444014~~444805

~~773~~771.~~085479~~267781

0709/01/05

0709/30/05

100.00

1,000.000000

~~228~~96,~~793~~656.800000

0.000000

~~228~~96,~~793~~656.800000

1,000.000000

Page 2 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Distribution to Date - Senior Certificates

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

35,000,000.00

2,~~313~~437,~~678~~544.2572

1415,~~089~~290,~~206~~160.3289

2,~~085~~131,~~932~~421.0508

1617,~~175~~421,~~138~~581.3797

1819,~~488~~859,~~816~~126.6269

0.00

1817,~~824~~578,~~861~~418.6303

A-2

3,175,425.00

0.00

~~275~~298,~~479~~523.0339

3,~~450~~473,~~904~~948.0339

A-3

108,612,255.00

4,~~040~~460,~~763~~067.9845

4246,~~811~~459,~~567~~707.6545

6,~~337~~475,~~444~~599.5166

4952,~~149~~935,~~012~~307.1611

5357,~~189~~395,~~776~~374.1456

0.00

5955,~~463~~676,~~242~~947.8489

A-4

0.00

10,~~397~~761,~~563~~194.2208

0.00

10,~~397~~761,~~563~~194.2208

0.00

A-5

80,000,000.00

5,~~509~~820,~~765~~863.5768

2831,~~488~~504,~~038~~308.2721

4,~~232~~346,~~183~~432.8833

3235,~~720~~850,~~222~~740.1554

3841,~~229~~671,~~987~~604.7222

0.00

4744,~~279~~149,~~777~~259.8445

A-6

12,845,000.00

0.00

11,630,448.77

1,703,964.24

13,334,413.01

0.00

489,413.01

0.00

A-7

50,000,000.00

3,~~013~~183,~~153~~284.0786

1719,~~805~~690,~~023~~192.8654

2,~~645~~716,~~114~~520.9220

2022,~~450~~406,~~138~~712.7975

2325,~~463~~589,~~291~~997.8661

0.00

2927,~~549~~593,~~861~~287.2226

A-8

0.00

~~430~~454,~~450~~755.4702

0.00

~~430~~454,~~450~~755.4702

0.00

112,246.00

0.00

3031,~~265~~678.1206

3,~~392~~585.6164

3335,~~657~~263.7370

0.00

7876,~~588~~982.2629

A-X

0.00

1,~~262~~314,~~509~~122.0506

0.00

1,~~262~~314,~~509~~122.0506

0.00

100.00

0.31

34.70

65.30

100.00

100.31

0.00

B-1

7,585,000.00

~~839~~904,~~814~~364.6864

0.04

~~539~~555,~~031~~598.1234

~~539~~555,~~031~~598.1638

1,~~378~~459,~~845~~963.8402

0.00

7,~~045~~029,~~968~~401.8563

B-2

2,275,500.00

~~251~~271,~~944~~309.4544

0.02

~~161~~166,~~709~~679.3451

~~161~~166,~~709~~679.3653

~~413~~437,~~653~~988.8197

0.00

2,~~113~~108,~~790~~820.6548

B-3

1,517,000.00

~~167~~180,~~962~~872.96

0.00

~~107~~111,~~806~~119.2470

~~275~~291,~~769~~992.2066

0.00

1,~~409~~405,~~193~~880.7630

B-4

758,500.00

8390,~~981~~436.4950

0.00

5355,~~903~~559.1487

~~137~~145,~~884~~996.6337

0.00

~~704~~702,~~596~~940.8613

B-5

303,400.00

3336,~~592~~174.6061

0.00

2122,~~561~~223.2797

5558,~~153~~398.8758

0.00

281,~~838~~176.7303

B-6

1,213,601.00

~~130~~139,~~900~~495.0329

0.00

8587,~~368~~574.9388

8587,~~368~~574.9893

~~216~~227,~~269~~070.0122

190,014.6568

0.00

~~938~~936,~~217~~011.3135

100.00

~~220~~251,~~259~~081.5173

0.00

~~220~~251,~~259~~081.5173

0.00

100.00

Total

303,398,127.00

2830,~~696~~305,~~339~~567.6435

~~114~~124,~~854~~606,~~584~~530.7568

1718,~~977~~376,~~477~~344.5572

~~132~~142,~~832~~982,~~062~~875.3646

~~161~~173,~~528~~288,~~402~~442.0081

190,014.6568

~~764~~787,~~892~~936.0440

~~171~~161,~~140~~013,~~941~~173.9823

Interest Detail - Senior Certificates

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

4.00000%

1918,~~588~~335,~~465~~076.3684

6561,~~294~~116.8892

0.00

6561,~~294~~116.8892

6561,~~294~~116.8993

0.00

A-2

4.00000%

3,~~439~~462,~~439~~407.2303

11,~~464~~541.8036

0.00

11,~~464~~541.8036

0.00

A-3

4.~~01000~~38000%

6157,~~784~~976,~~417~~902.1782

~~206~~211,~~462~~615.9370

0.00

~~206~~211,~~462~~615.9370

0.00

A-4

3.~~99000~~62000%

6157,~~784~~976,~~417~~902.1782

~~205~~174,~~433~~896.1999

0.00

~~205~~174,~~433~~896.1999

~~205~~174,~~433~~897.1900

0.00

A-5

4.00000%

4946,~~197~~049,~~614~~653.7578

~~163~~153,~~992~~498.0585

0.00

~~163~~153,~~992~~498.0585

0.00

A-6

0.00000%

0.00

A-7

3.50000%

3028,~~748~~781,~~509~~033.2769

8983,~~683~~944.1568

0.00

8983,~~683~~944.1568

8983,~~683~~944.1669

0.00

A-8

0.50000%

3028,~~748~~781,~~509~~033.2769

1211,~~811~~992.8810

0.00

1211,~~811~~992.8810

0.00

0.00000%

8077,~~786~~607.4398

0.00

A-X

0.~~26536~~27422%

~~118~~110,~~104~~249,~~154~~013.9641

2625,~~116~~193.7886

0.00

2625,~~116~~193.7886

2625,~~116~~193.7986

0.00

0.00000%

0.00

B-1

5.50000%

7,~~054~~037,~~130~~656.3839

32,~~331~~255.4393

0.00

32,~~331~~255.4393

32,~~331~~255.4493

0.00

B-2

5.50000%

2,~~116~~111,~~239~~296.1191

9,~~699~~676.4378

0.00

9,~~699~~676.4378

0.00

B-3

5.50000%

1,~~410~~407,~~826~~531.0726

6,~~466~~451.2918

0.00

6,~~466~~451.2918

6,~~466~~451.2919

0.00

B-4

5.50000%

~~705~~703,~~413~~765.0261

3,~~233~~225.1459

0.00

3,~~233~~225.1459

3,~~233~~225.1560

0.00

B-5

5.50000%

~~282~~281,~~165~~506.2023

1,~~293~~290.2624

0.00

1,~~293~~290.2624

0.00

B-6

5.50000%

~~939~~937,~~546~~110.3149

4,~~306~~295.2509

0.00

4,~~306~~295.2509

4,~~306~~295.2609

0.00

~~274~~115,~~552~~988.~~56000~~16000%

100.00

0.00

229,~~879~~665.3868

0.00

Total

~~387~~364,~~984~~168,~~733~~598.7095

~~838~~790,~~589~~995.4627

0.00

~~838~~790,~~589~~995.4627

~~861~~800,~~468~~661.9000

0.00

Page 3 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Collection Account Report

SUMMARY

Total

Principal Collections

6,~~206~~148,~~468~~475.3280

Principal Withrawals

0.00

Principal Other Accounts

0.00

TOTAL NET PRINCIPAL

6,~~206~~148,~~468~~475.3280

Interest Collections

~~849~~799,~~111~~691.5699

Interest Withdrawals

-0.00

Interest Other Accounts

229,~~879~~665.3868

Interest Fees

-108,~~522~~696.1069

TOTAL NET INTEREST

~~861~~800,~~468~~660.8498

TOTAL AVAILABLE FUNDS FOR DISTRIBUTION

76,~~067~~949,~~937~~136.1678

PRINCIPAL - COLLECTIONS

Total

Scheduled Principal Received

~~205~~196,~~192~~076.1624

Curtailments

2217,~~134~~300.3425

Prepayments In Full

5,~~979~~935,~~383~~099.8231

Repurchased/Substitutions

0.00

Liquidations

0.00

Insurance Principal

0.00

Other Additional Principal

0.00

Delinquent Principal

-~~175~~166,~~163~~602.9589

Realized Losses

-~~242~~0.00

Advanced Principal

~~175~~166,~~163~~602.9589

TOTAL PRINCIPAL COLLECTED

6,~~206~~148,~~468~~475.3280

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 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

INTEREST - COLLECTIONS

Total

Scheduled Interest

~~885~~833,~~134~~296.7259

Repurchased/Substitution Interest

0.00

Liquidation Interest

0.00

Insurance Interest

0.00

Other Additional Interest

0.00

Prepayment Interest Shortfalls

-23,~~628~~468.3577

Delinquent Interest

-~~727~~681,~~585~~987.8969

Compensating Interest

23,~~628~~468.3576

Civil Relief Act Shortfalls

-0.00

Interest Advanced

~~691~~648,~~562~~383.7409

TOTAL INTEREST COLLECTED

~~849~~799,~~111~~691.5699

INTEREST - WITHDRAWALS

Total

TOTAL INTEREST WITHDRAWALS

0.00

INTEREST - OTHER ACCOUNTS

Total

Prepayment Charges

229,~~879~~665.3868

TOTAL INTEREST OTHER ACCOUNTS

229,~~879~~665.3868

INTEREST - FEES

Total

Current Servicing Fees

7,~~813~~651.6692

Trustee Fees

1,~~108~~044.4477

REMIC Tax Filing Fees

~~1,600~~0.00

TOTAL INTEREST FEES

108,~~522~~696.1069

Page 5 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Collateral Report

COLLATERAL

Total

Loan Count:

Original

810

Prior

~~482~~452

Prefunding

Scheduled Paid Offs

-0

Full Voluntary Prepayments

-1816

Repurchases

-0

Liquidations

-0

Current

~~464~~436

Principal Balance:

Original

303,250,183.98

Prior

~~177~~167,~~347~~161,~~552~~549.3003

Prefunding

0.00

Scheduled Principal

-~~205~~196,~~192~~076.1624

Partial Prepayments

-2217,~~134~~300.3425

Full Voluntary Prepayments

-5,~~979~~935,~~383~~099.8231

Repurchases

-0.00

Liquidations

-0.00

Current

~~171~~161,~~140~~013,~~841~~073.9823

PREFUNDING

SPACE INTENTIONALLY LEFT BLANK

Page 7 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

CHARACTERISTICS

Total

Weighted Average Coupon Original

6.10169%

Weighted Average Coupon Prior

5.~~99290~~98665%

Weighted Average Coupon Current

5.~~98915~~98197%

Weighted Average Months to Maturity Original

358

Weighted Average Months to Maturity Prior

~~332~~330

Weighted Average Months to Maturity Current

~~331~~329

Weighted Avg Remaining Amortization Term Original

358

Weighted Avg Remaining Amortization Term Prior

~~332~~330

Weighted Avg Remaining Amortization Term Current

~~331~~329

Weighted Average Seasoning Original

1.15

Weighted Average Seasoning Prior

2426.1011

Weighted Average Seasoning Current

2527.11

Page 8 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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

7,~~813~~651.6692

Delinquent Servicing Fees

3633,~~023~~604.1660

TOTAL SERVICING FEES

4341,~~836~~256.8152

Total Servicing Fees

4341,~~836~~256.8152

Compensating Interest

-23,~~628~~468.3576

Delinquent Servicing Fees

-3633,~~023~~604.1660

COLLECTED SERVICING FEES

54,~~185~~183.3015

Total Advaced Interest

~~691~~648,~~562~~383.7409

Total Advaced Principal

~~175~~166,~~163~~602.9589

Aggregate Advances with respect to this Distribution

~~866~~814,~~726~~985.6899

ADDITIONAL COLLATERAL INFORMATION

Total

Prepayment Interest Shortfall (PPIS)

23,~~628~~468.3577

Compensating Interest

-23,~~628~~468.3576

Net Prepayment Interest Shortfall (PPIS)

0.00

Weighted Average Net Mortgage Rate

5.~~674211~~678306%

Page 9 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Delinquency Report

TOTAL

< 1 PAYMENT

1 PAYMENT

2 PAYMENTS

3+ PAYMENTS

TOTAL

DELINQUENT

Balance

23,~~621~~288,~~663~~486.0009

~~808,810~~0.0200

1666,~~076,264~~673.3161

43,~~506~~955,~~737~~159.3370

% Balance

12.5304%

0.4700%

0.6341%

2.6346%

# Loans

1211

% # Loans

1.5183%

0.4300%

0.6569%

2.5952%

FORECLOSURE

Balance

0.00

% Balance

0.00%

# Loans

% # Loans

0.00%

BANKRUPTCY

Balance

0457,903.0092

0.00

~~459,010~~0.8100

0.00

~~459~~457,~~010~~903.8192

% Balance

0.0028%

0.00%

0.2700%

0.00%

0.2728%

# Loans

% # Loans

0.0023%

0.00%

0.2200%

0.00%

0.2223%

REO

Balance

0.00

% Balance

0.00%

# Loans

% # Loans

0.00%

TOTAL

Balance

0457,903.0092

23,~~621~~288,~~663~~486.0009

~~1,267,820~~0.8300

1666,~~076,264~~673.3161

4,~~965~~413,~~748~~063.1462

% Balance

0.0028%

12.5304%

0.7400%

0.6341%

2.9074%

# Loans

1312

% # Loans

0.0023%

1.5183%

0.6500%

0.6569%

2.8075%

Page 10 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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

TOTAL

Page 11 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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

TOTAL

Page 12 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Prepayment Report

VOLUNTARY PREPAYMENTS

Total

Current

Number of Paid in Full Loans

1816

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

1816

Curtailments Amount

2217,~~134~~300.3425

Paid in Full Balance

5,~~979~~935,~~383~~099.8231

Repurchased Loans Balance

0.00

Total Prepayment Amount

65,~~001~~952,~~518~~399.1656

Cumulative

Number of Paid in Full Loans

~~306~~334

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

~~345~~373

Paid in Full Balance

~~112~~122,~~844~~547,~~082~~621.8942

Repurchased Loans Balance

11,419,822.54

Curtailments Amount

1,~~067~~094,~~965~~212.1935

Total Prepayment Amount

~~125~~135,~~331~~061,~~870~~656.6231

Page 13 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

VOLUNTARY PREPAYMENTS RATES

Total

SMM

3.3957%

3 Months Avg SMM

23.6106%

12 Months Avg SMM

2.5749%

Avg SMM Since Cut-off

2.1621%

CPR

3335.8731%

3 Months Avg CPR

2731.2310%

12 Months Avg CPR

26.8207%

Avg CPR Since Cut-off

23.0354%

PSA

~~674~~651.5938%

3 Months Avg PSA Approximation

~~564~~595.8354%

12 Months Avg PSA Approximation

~~683~~603.9213%

Avg PSA Since Cut-off Approximation

~~877~~833.8887%

Page 14 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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) Conditional Prepayment Rate (CPR): 1-((1-SMM)^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) Dates correspond to distribution dates. Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments, liquidations, and repurchases.

Page 15 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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

2274671 1

191,500.00

187,133.10

15-Aug-2005

7.250%

AZ - 89.91%

Paid Off - 360

01-May-2003

2154486 1

523,000.00

507,039.59

07-Oct-2005

5.875%

CA - 61.53%

Paid Off - 360

01-Jun-2003

2297485 1

411,600.00

400,940.59

27-Jul-2005

5.875%

CA - 69.76%

Paid Off - 360

01-Aug-2003

2155021 1

345,000.00

334,355.39

10-Oct-2005

5.875%

CA - 53.91%

Paid Off - 360

01-Jun-2003

2557686 1

462,000.00

451,570.24

29-Jul-2005

6.625%

CA - 80.00%

Paid Off - 360

01-Aug-2003

2201249 1

139,000.00

135,124.36

29-Sep-2005

6.375%

CA - 100.00%

Paid Off - 360

01-Jun-2003

2558257 1

91,800.00

89,790.37

20-Jul-2005

7.250%

FL - 90.00%

Paid Off - 360

01-Jun-2003

2471447 1

389,500.00

380,615.01

14-Oct-2005

6.875%

NY - 95.00%

Paid Off - 360

01-Sep-2003

2563302 1

486,000.00

473,126.93

12-Aug-2005

5.750%

CA - 41.36%

Paid Off - 360

01-Aug-2003

2501207 1

215,000.00

208,937.80

19-Sep-2005

5.875%

CA - 74.14%

Paid Off - 360

01-Aug-2003

2580504 1

375,000.00

365,924.69

02-Aug-2005

6.000%

CA - 73.82%

Paid Off - 360

01-Sep-2003

2538583 1

393,000.00

381,919.18

06-Oct-2005

5.875%

CA - 58.22%

Paid Off - 360

01-Aug-2003

2583034 1

146,500.00

141,523.31

27-Jul-2005

5.875%

NY - 82.77%

Paid Off - 360

01-Aug-2003

2541427 1

420,000.00

409,184.91

16-Sep-2005

6.375%

NY - 89.36%

Paid Off - 360

01-Aug-2003

2603269 1

390,000.00

371,634.99

26-Jul-2005

5.875%

CA - 56.52%

Paid Off - 360

01-Aug-2003

2631217 1

1,000,000.00

972,432.43

29-Sep-2005

6.000%

NC - 43.48%

Paid Off - 360

01-Aug-2003

2631626 1

140,000.00

136,455.54

20-Jul-2005

6.000%

CA - 59.83%

Paid Off - 360

01-Aug-2003

2638347 1

360,000.00

349,849.44

27-Sep-2005

5.875%

CA - 31.03%

Paid Off - 360

01-Aug-2003

2650180 1

440,000.00

428,858.07

28-Jul-2005

5.750%

CA - 58.28%

Paid Off - 360

01-Sep-2003

2660936 1

160,000.00

155,952.62

20-Sep-2005

6.250%

CA - 58.61%

Paid Off - 360

01-Sep-2003

2656789 1

356,000.00

347,186.70

20-Jul-2005

5.875%

CA - 78.24%

Paid Off - 360

01-Sep-2003

2706338 1

390,000.00

379,213.10

13-Sep-2005

5.750%

FL - 88.66%

Paid Off - 360

01-Sep-2003

2679788 1

460,000.00

449,206.03

09-Aug-2005

6.500%

NY - 80.00%

Paid Off - 360

01-Sep-2003

2709561 1

355,000.00

345,261.89

29-Sep-2005

6.250%

CA - 64.90%

Paid Off - 360

01-Jul-2003

2740929 1

400,000.00

387,429.77

02-Aug-2005

6.125%

CA - 88.30%

Paid Off - 360

01-Jul-2003

2734729 1

345,000.00

333,041.40

06-Oct-2005

6.125%

NY - 92.00%

Paid Off - 360

01-Sep-2003

2741679 1

385,000.00

374,587.87

20-Jul-2005

5.875%

CA - 79.38%

Paid Off - 360

01-Jul-2003

2735540 1

405,000.00

393,111.83

04-Oct-2005

5.875%

VA - 72.32%

Paid Off - 360

01-Jul-2003

2741927 1

340,000.00

329,340.64

01-Aug-2005

5.875%

CA - 80.00%

Paid Off - 360

01-Jul-2003

2738546 1

386,910.00

375,983.33

13-Oct-2005

6.375%

CA - 90.00%

Paid Off - 360

01-Sep-2003

2775590 1

380,000.00

256,610.30

15-Aug-2005

6.375%

NY - 80.00%

Paid Off - 360

01-Aug-2003

2775765 1

281,000.00

273,077.03

30-Sep-2005

5.875%

NY - 61.09%

Paid Off - 360

01-Aug-2003

2799361 1

165,500.00

161,176.71

10-Aug-2005

6.000%

FL - 63.65%

Paid Off - 360

01-Aug-2003

TOTAL

6,107,410.00

5,935,099.31

4053078 1

650,000.00

626,887.97

11-Aug-2005

5.750%

CA - 64.36%

Paid Off - 360

01-Aug-2003

TOTAL

6,270,900.00

5,979,383.82

Page 16 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES

Total

Current

Number of Loans Liquidated

Collateral Principal Realized Loss/(Gain) Amount

~~242~~0.00

Collateral Interest Realized Loss/(Gain) Amount

0.00

Net Liquidation Proceeds

~~(242~~0.00)

Cumulative

Number of Loans Liquidated

Collateral Realized Loss/(Gain) Amount

190,014.65

Net Liquidation Proceeds

134,588.12

Special Hazard Loss Coverage Amt

4,066,039.36

Fraud Loss Coverage Amt

1,819,032.34

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 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

DEFAULT SPEEDS

Total

MDR

0.00%

3 Months Avg MDR

0.00%

12 Months Avg MDR

0.01%

Avg MDR Since Cut-off

0.01%

CDR

0.00%

3 Months Avg CDR

0.00%

12 Months Avg CDR

0.17%

Avg CDR Since Cut-off

0.0807%

SDA

0.00%

3 Months Avg SDA Approximation

0.00%

12 Months Avg SDA Approximation

0.4238%

Avg SDA Since Cut-off Approximation

0.3026%

Loss Severity Approximation for Current Period

0.00%

3 Months Avg Loss Severity Approximation

0.00%

12 Months Avg Loss Severity Approximation

4.86%

Avg Loss Severity Approximation Since Cut-off

2.3316%

Page 18 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 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 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Realized Loss Detail Report

Loan Number

Current

State &

Prior

Realized

Cumulative

Loan

Note

LTV at

Original

Principal

Loss/(Gain)

Realized

Loan Group

Status

Rate

Origination

Term

Balance

Revision

Loss/(Gain)

2721075 1

TOTAL

GA - 95.00%

360

Revision

242.00

TOTAL

242.00

Page 20 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Triggers and Adj. Cert. Report

TRIGGER EVENTS

Total

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

Has Sr. Prepay Stepdown Condition Occurred

Has Sr. Credit Supp. Depletion Date Occured

Has Special Haz. Cov. Term Date Occured

Has Fraud Loss Coverage Term Date Occured

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

92.~~943787~~531379%

Next Senior Percentage

92.~~696456~~255168%

Current Subordinate Percentage

7.~~056213~~468621%

Next Subordinate Percentage

7.~~303544~~744832%

Senior Prepayment Percentage

100.000000%

Next Senior Prepayment Percentage

100.000000%

Subordinate Prepayment Percentage

0.000000%

Next Subordinate Prepayment Percentage

0.000000%

Current LIBOR Rate

3.~~460000~~830000%

Next LIBOR Rate

0.000000%

Page 21 of 22

IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates

2003-A9

August 25, 2005 Distribution

October 25, 2005 Distribution

Other Related Information

ADDITIONAL INFORMATION

Total

Current Scheduled Payments

1,~~090~~029,~~326~~372.8883

Current Scheduled Payments 1 Month Prior

1,~~120~~055,~~137~~706.0072

Current Scheduled Payments 2 Month Prior

1,~~144~~090,~~569~~326.4688

Current Scheduled Payments 3 Month Prior

1,~~173~~120,~~268~~137.9200

Current Scheduled Payments 4 Month Prior

1,~~198~~144,~~060~~569.0646

Current Scheduled Payments 5 Month Prior

1,~~223~~173,~~823~~268.9192

Current Scheduled Payments 6 Month Prior

1,~~254~~198,~~105~~060.6106

Current Scheduled Payments 7 Month Prior

1,~~283~~223,~~038~~823.9291

Current Scheduled Payments 8 Month Prior

1,~~302~~254,~~824~~105.6061

Current Scheduled Payments 9 Month Prior

1,~~337~~283,~~034~~038.3592

Current Scheduled Payments 10 Month Prior

1,~~393~~302,~~745~~824.5460

Current Scheduled Payments 11 Month Prior

1,~~444~~337,~~570~~034.35

Delinquent 60+ Scheduled Payments

157,~~003~~160.7566

Delinq. 60+ Sched. Pmnts, 1 Month Prior

97,~~761~~160.6865

Delinq. 60+ Sched. Pmnts, 2 Month Prior

1415,~~171~~003.7875

Delinq. 60+ Sched. Pmnts, 3 Month Prior

169,~~141~~761.4968

Delinq. 60+ Sched. Pmnts, 4 Month Prior

1114,~~970~~171.0778

Delinq. 60+ Sched. Pmnts, 5 Month Prior

1316,~~345~~141.9949

Delinq. 60+ Sched. Pmnts, 6 Month Prior

1511,~~963~~970.1807

Delinq. 60+ Sched. Pmnts, 7 Month Prior

613,~~526~~345.0799

Delinq. 60+ Sched. Pmnts, 8 Month Prior

915,~~143~~963.2818

Delinq. 60+ Sched. Pmnts, 9 Month Prior

6,~~095~~526.3907

Delinq. 60+ Sched. Pmnts, 10 Month Prior

29,~~171~~143.8128

Delinq. 60+ Sched. Pmnts, 11 Month Prior

76,~~159~~095.4839

Page 22 of 22

Filing Compare · INDYMAC MBS INC RESIDENTIAL ASSET SEC TRUST 2004 R1