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): ~~June~~September 2527, 2004 ~~INDYMAC~~(Date ~~MBS,~~of ~~INC.~~earliest asevent ~~Depositor,~~reported) ~~IndyMac~~Indymac ~~Bank,~~MBS ~~F.S.B.~~Inc (as ~~Seller~~Depositor ~~and as Master Servicer, and Deutsche Bank National Trust Company, as trustee~~ under the Pooling and Servicing Agreement, dated as of February 1, 2004, providing for the issuance of IndyMac MBS, Inc. Residential Asset- Securitization Trust Series 2004-IndyPort1 Mortgage Pass-Through Certificates Series 2004-1. ~~RESIDENTIAL ASSET SECURITIZATION TRUST 2004- IndyPort1~~ (Exact name of ~~Registrant~~registrant as specified in ~~its Charter~~charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-102888-15 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 58.01 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 79.01 Financial ~~Statement~~Statements and Exhibits (c) Exhibits: ~~(as~~Exhibit ~~noted~~No. inDescription ~~Item~~99.1 ~~5 above)~~ Monthly Remittance Statement to the Certificateholders dated as of ~~June~~September 2527, 2004. ~~SIGNATURE~~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, ~~not~~ in itits ~~individual~~ capacity, ~~but solely~~ as aTrustee ~~duly~~under ~~authorized agent of~~ the ~~Registrant pursuant to the~~ Pooling and Servicing Agreement, ~~dated~~on asbehalf of ~~February~~Indymac 1MBS Inc,~~2004.~~ Registrant Date: ~~Jul~~Oct 1301, 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 ~~June~~September 2527, 2004.

	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	June 25, 2004 Distribution
	September 27, 2004 Distribution
	Contents
			TABLE OF CONTENTS
								Page
			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				6
			4.	Credit Enhancement Report				9
			5.	Collateral Report				10
			6.	Delinquency Report				13
			7.	REO Report				14
			8.	Prepayment Report				15
			9.	Prepayment Detail Report				18
			10.	Realized Loss Report				19
			11.	Realized Loss Detail Report				22
			12.	Triggers, Adj. Rate Cert. and Miscellaneous Report				23
			13.	Other Related Information				24
			14.	Additional Certificate Report				25
				Total Number of Pages				25
			CONTACTS
				Administrator: Brent Hoyler
				Direct Phone Number: (714)247-6322
				Address: Deutsche Bank
				1761 E. St. Andrew Place, Santa Ana, CA 92705
				Web Site: https://www.corporatetrust.db.com/invr
				Factor Information: (800) 735-7777
				Main Phone Number: (714) 247-6000
ISSUANCE INFORMATION
	Seller:		IndyMac Bank					Cut-Off Date: February 1, 2004
	Certificate Insurer(s):							Closing Date: February 24, 2004
								First Payment Date: March 25, 2004
	Servicer(s):		IndyMac Bank Master Servicer
								Distribution Date: June 25, 2004
								Distribution Date: September 27, 2004
	Underwriter(s):		UBS Investment Bank Underwriter					Record Date: ~~May~~August 2831, 2004
			Deutsche Bank Securities Underwriter
						Page 1 of 25					© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Master REMIC
	Certificate Payment Report for June 25, 2004 Distribution
	Certificate Payment Report for September 27, 2004 Distribution
	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
A-1	CSTR	484,225,000.00			~~395~~336,~~241~~277,~~417~~992.0312	1,~~321~~118,~~475~~431.7559	2119,~~343~~023,~~757~~941.7639	2220,~~665~~142,~~233~~372.5198	-	-	~~373~~317,~~897~~254,~~659~~050.2773
A-1X	IO, NTL, DR	-			-	~~386~~328,~~018~~430.1366	-	~~386~~328,~~018~~430.1366	-	-	-
A-R	R, CSTR	100.00			-	-	-	-	-	-	-
B-1	SUB, CSTR	22,468,000.00			22,~~391~~312,~~678~~279.8051	8382,~~509~~821.5481	26198,~~205~~697.5166	~~109~~281,~~715~~519.0547	-	-	22,~~365~~113,~~473~~581.2985
B-1X	IO, NTL, DR	-			-	13,~~225~~178.4051	-	13,~~225~~178.4051	-	-	-
B-2	SUB, CSTR	2,582,000.00			2,~~573~~564,~~229~~104.2577	11,~~116~~032.6826	322,~~011~~834.5114	1433,~~128~~866.1940	-	-	2,~~570~~541,~~217~~270.7463
B-3	SUB, CSTR	3,099,000.00			3,~~088~~077,~~473~~521.0555	13,~~342~~241.6028	327,~~614~~406.5127	1640,~~957~~647.1155	-	-	3,~~084~~050,~~858~~115.5428
B-4	SUB, CSTR	1,808,000.00			1,~~801~~795,~~858~~469.4317	7,~~784~~725.2615	215,~~108~~989.7620	923,~~893~~714.0235	-	-	1,~~799~~779,~~749~~479.6797
B-5	SUB, CSTR	1,292,000.00			1,~~287~~283,~~611~~045.2244	5,~~562~~520.6540	111,~~506~~425.9291	716,~~069~~946.5731	-	-	1,~~286~~271,~~104~~619.3053
B-6	SUB, CSTR	1,033,072.00			1,~~029~~025,~~562~~912.7903	4,~~447~~414.8407	19,~~204~~136.9205	513,~~652~~550.7612	-	-	1,~~028~~016,~~357~~775.8798
P	EXE	100.00			100.00	5135,~~433~~982.0037	-	5135,~~433~~982.0037	-	-	100.00
Total		516,507,272.00			~~427~~368,~~413~~336,~~930~~424.5759	1,~~897~~620,~~915~~778.8510	2119,~~381~~309,~~409~~430.8962	2320,~~279~~930,~~325~~208.7472	-	-	~~406~~349,~~032~~026,~~520~~993.6897
	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)
A-1				A-30/360	45660NYL3	484,225,000.00	~~816~~694.~~235050~~466399	2.~~729053~~309735	4439.~~078182~~287400	4641.~~807235~~597136	~~772~~655.~~156868~~178999
A-1X				F-30/360	45660NYM1	484,225,000.00	~~816~~694.~~235050~~466399	0.~~797188~~678260	-	0.~~797188~~678260	~~772~~655.~~156868~~178999
A-R				A-30/360	45660NYN9	100.00	-	-	-	-	-
B-1				A-30/360	45660NYP4	22,468,000.00	~~996~~993.~~603116~~069232	3.~~716821~~686212	18.~~166348~~843585	412.~~883169~~529797	~~995~~984.~~436767~~225648
B-1X				F-30/360	45660NYQ2	22,468,000.00	~~996~~993.~~603116~~069232	0.~~588633~~586546	-	0.~~588633~~586546	~~995~~984.~~436767~~225648
B-2				A-30/360	45660NYR0	2,582,000.00	~~996~~993.~~603118~~069237	4.~~305453~~272758	18.~~166348~~843586	513.~~471801~~116344	~~995~~984.~~436770~~225651
B-3				A-30/360	45660NYS8	3,099,000.00	~~996~~993.~~603114~~069232	4.~~305453~~272759	18.~~166347~~843585	513.~~471801~~116344	~~995~~984.~~436767~~225647
B-4				A-30/360	45660NYT6	1,808,000.00	~~996~~993.~~603114~~069231	4.~~305454~~272760	18.~~166350~~843584	513.~~471803~~116344	~~995~~984.~~436764~~225647
B-5				A-30/360	45660NYU3	1,292,000.00	~~996~~993.~~603111~~069226	4.~~305457~~272755	18.~~166347~~843584	513.~~471803~~116339	~~995~~984.~~436765~~225642
B-6				A-30/360	45660NYV1	1,033,072.00	~~996~~993.~~603131~~069244	4.~~305450~~272761	18.~~166347~~843575	513.~~471797~~116337	~~995~~984.~~436785~~225669
P				A-30/360	IN04P10P1	100.00	1,000.000000	~~514~~359,~~329~~823.~~984000~~684000	-	~~514~~359,~~329~~823.~~984000~~684000	1,000.000000
							Page 2 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Master REMIC
	Certificate Payment Report for June 25, 2004 Distribution
	Certificate Payment Report for September 27, 2004 Distribution
	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
A-1	484,225,000.00		59,~~964~~503,~~771~~462.9040		~~108~~163,~~154~~423,~~026~~934.1753	23,~~173~~547,~~314~~014.5674	~~110~~166,~~327~~970,~~340~~949.7327	~~116~~176,~~292~~474,~~112~~411.6367	-	-	~~373~~317,~~897~~254,~~659~~050.2773
A-1X	-		12,~~735~~772,~~180~~373.8184		-	-	-	12,~~735~~772,~~180~~373.8184	-	-	-
A-R	100.00		0.43		97.34	2.66	100.00	100.43	-	-	-
B-1	22,468,000.00		~~335~~584,~~805~~970.6012		~~100~~346,~~368~~340.6205	28,~~158~~078.0910	~~102~~354,~~526~~418.7115	~~438~~939,~~332~~388.3127	-	-	22,~~365~~113,~~473~~581.2985
B-1X	-		5292,~~993~~575.1899		-	-	-	5292,~~993~~575.1899	-	-	-
B-2	2,582,000.00		4477,~~680~~862.3691		1139,~~534~~801.2605	~~248~~928.0032	1140,~~782~~729.2637	56118,~~462~~592.6228	-	-	2,~~570~~541,~~217~~270.7463
B-3	3,099,000.00		5393,~~626~~453.8260		1347,~~843~~770.7951	~~297~~1,114.6721	1448,~~141~~884.4672	67142,~~768~~338.2832	-	-	3,~~084~~050,~~858~~115.5428
B-4	1,808,000.00		3154,~~286~~522.6414		827,~~076~~869.6798	~~173~~650.6605	828,~~250~~520.3303	3983,~~536~~042.9717	-	-	1,~~799~~779,~~749~~479.6797
B-5	1,292,000.00		2238,~~357~~961.4962		519,~~771~~915.6094	~~124~~464.1053	520,~~895~~380.7047	2859,~~253~~342.1909	-	-	1,~~286~~271,~~104~~619.3053
B-6	1,033,072.00		1731,~~876~~153.8537		415,~~614~~924.9059	99371.2343	416,~~714~~296.1302	2247,~~590~~449.9839	-	-	1,~~028~~016,~~357~~775.8798
P	100.00		~~182~~288,~~280~~563.1352		-	-	-	~~182~~288,~~280~~563.1352	-	-	100.00
Total	516,507,272.00		813,~~440~~537,~~860~~899.2194		~~108~~163,~~298~~921,~~333~~653.3599	23,~~176~~558,~~417~~624.9704	~~110~~167,~~474~~480,~~751~~278.3203	~~118~~181,~~915~~018,~~611~~177.5397	-	-	~~406~~349,~~032~~026,~~520~~993.6897
	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	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
A-1	43.~~01216~~99110%	~~395~~336,~~241~~277,~~417~~992.0312			1,~~321~~118,~~475~~431.7559	-	-	-	1,~~321~~118,~~475~~431.7559	1,~~321~~118,~~475~~431.7559	-
A-1X	1.17200%	~~395~~336,~~241~~277,~~417~~992.0312			~~386~~328,~~018~~430.1366	-	-	-	~~386~~328,~~018~~430.1366	~~386~~328,~~018~~430.1366	-
A-R	5.~~18415~~16309%	-			-	-	-	-	-	-	-
B-1	4.~~47539~~45433%	22,~~391~~312,~~678~~279.8051			8382,~~509~~821.5481	-	-	-	8382,~~509~~821.5481	8382,~~509~~821.5481	-
B-1X	0.70877%	22,~~391~~312,~~678~~279.8051			13,~~225~~178.4051	-	-	-	13,~~225~~178.4051	13,~~225~~178.4051	-
B-2	5.~~18415~~16309%	2,~~573~~564,~~229~~104.2577			11,~~116~~032.6826	-	-	-	11,~~116~~032.6826	11,~~116~~032.6826	-
B-3	5.~~18415~~16309%	3,~~088~~077,~~473~~521.0555			13,~~342~~241.6028	-	-	-	13,~~342~~241.6028	13,~~342~~241.6028	-
B-4	5.~~18415~~16309%	1,~~801~~795,~~858~~469.4317			7,~~784~~725.2615	-	-	-	7,~~784~~725.2615	7,~~784~~725.2615	-
B-5	5.~~18415~~16309%	1,~~287~~283,~~611~~045.2244			5,~~562~~520.6540	-	-	-	5,~~562~~520.6540	5,~~562~~520.6540	-
B-6	5.~~18415~~16309%	1,~~029~~025,~~562~~912.7903			4,~~447~~414.8407	-	-	-	4,~~447~~414.8407	4,~~447~~414.8407	-
P		100.00			1,~~846~~584,~~482~~795.8573	-	-	-	1,~~846~~584,~~482~~795.8573	5135,~~433~~982.0037	-
Total		~~845~~726,~~047~~926,~~026~~696.4022			3,~~692~~169,~~965~~591.7046	-	-	-	3,~~692~~169,~~965~~591.7046	1,~~897~~620,~~915~~778.8510	-
							Page 3 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Subsidiary REMIC
	Certificate Payment Report for June 25, 2004 Distribution
	Certificate Payment Report for September 27, 2004 Distribution
	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
SUB-REMIC	REMIC	516,507,072.00			~~427~~368,~~413~~336,~~830~~324.5759	1,~~897~~620,~~915~~778.8510	2119,~~381~~309,~~409~~430.8962	2320,~~279~~930,~~325~~208.7472	-	-	~~406~~349,~~032~~026,~~420~~893.6897
Total		516,507,072.00			~~427~~368,~~413~~336,~~830~~324.5759	1,~~897~~620,~~915~~778.8510	2119,~~381~~309,~~409~~430.8962	2320,~~279~~930,~~325~~208.7472	-	-	~~406~~349,~~032~~026,~~420~~893.6897
	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)
SUB-REMIC				A-30/360		516,507,072.00	~~827~~713.~~508187~~129296	3.~~674521~~137959	4137.~~396161~~384639	4540.~~070682~~522599	~~786~~675.~~112026~~744657
							Page 4 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Subsidiary REMIC
	Certificate Payment Report for June 25, 2004 Distribution
	Certificate Payment Report for September 27, 2004 Distribution
	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
SUB-REMIC	516,507,072.00		813,~~440~~537,~~860~~899.2194		~~108~~163,~~298~~921,~~333~~653.3599	23,~~176~~558,~~317~~524.9704	~~110~~167,~~474~~480,~~651~~178.3203	~~118~~181,~~915~~018,~~511~~077.5397	-	-	~~406~~349,~~032~~026,~~420~~893.6897
Total	516,507,072.00		813,~~440~~537,~~860~~899.2194		~~108~~163,~~298~~921,~~333~~653.3599	23,~~176~~558,~~317~~524.9704	~~110~~167,~~474~~480,~~651~~178.3203	~~118~~181,~~915~~018,~~511~~077.5397	-	-	~~406~~349,~~032~~026,~~420~~893.6897
	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	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
SUB-REMIC	5.~~18415~~16309%	~~427~~368,~~413~~336,~~830~~324.5759			3,~~692~~169,~~965~~591.7046	-	-	-	3,~~692~~169,~~965~~591.7046	1,~~897~~620,~~915~~778.8510	-
Total		~~427~~368,~~413~~336,~~830~~324.5759			3,~~692~~169,~~965~~591.7046	-	-	-	3,~~692~~169,~~965~~591.7046	1,~~897~~620,~~915~~778.8510	-
							Page 5 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Collection Account Report for June 25, 2004 Distribution
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report
SUMMARY								TOTAL
	Principal Collections							2119,~~381~~309,~~409~~430.8962
	Principal Withdrawals							0.00
	Principal Other Accounts							0.00
	TOTAL PRINCIPAL							2119,~~381~~309,~~409~~430.8962
	Interest Collections							1,~~846~~584,~~482~~795.8573
	Interest Withdrawals							0.00
	Interest Other Accounts							5135,~~433~~982.0037
	Interest Loan Adjustments							0.00
	Intrest Fees							0.00
	TOTAL INTEREST							1,~~897~~620,~~915~~778.8510
	TOTAL AVAILABLE FUNDS TO BONDHOLDERS							2320,~~279~~930,~~325~~208.7472
	Interest Payable to Bondholders							1,~~897~~620,~~915~~778.8510
	Principal Payment Amount Payable to Bondholders							2119,~~381~~309,~~409~~430.8962
PRINCIPAL - COLLECTIONS								TOTAL
	Scheduled Principal							~~500~~442,~~212~~567.4534
	Curtailments							~~137~~142,~~768~~221.9557
	Prepayments in Full							2015,~~743~~887,~~428~~061.4971
	Repurchases/Substitutions							02,837,580.00
	Liquidations							0.00
	Insurance Principal							0.00
	Other Additional Principal							0.00
	LESS: Delinquent Principal							(2362,~~711~~087.6753)
	LESS: Realized Losses							0.00
	PLUS: Recoveries							0.00
	PLUS: Substitution Shortfall Principal							0.00
	PLUS: Principal Loan Adjustments							0.00
	PLUS: Principal Advanced							2362,~~711~~087.6753
	TOTAL PRINCIPAL							2119,~~381~~309,~~409~~430.8962
				Page 6 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Collection Account Report for June 25, 2004 Distribution
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report
PRINCIPAL - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
PRINCIPAL - OTHER ACCOUNTS								TOTAL
	Cash Release							0.00
	TOTAL PRINCIPAL OTHER ACCOUNTS							0.00
INTEREST - COLLECTIONS								TOTAL
	Scheduled Interest							1,~~937~~647,~~664~~496.4760
	Repurchases/Substitutions							015,877.0054
	Liquidations							0.00
	Insurance Interest							0.00
	Other Additional Interest							0.00
	LESS: Prepayment Interest Shortfalls							(129,~~837~~265.3332)
	LESS: Interest Fees							(9018,~~683~~796.3875)
	LESS: Delinquent Interest							(111,~~454~~297,725.7545)
	LESS: Interest Realized Losses							0.00
	PLUS: Compensating Interest							129,~~837~~265.3332
	LESS: Civil Relief Act Shorfalls							0.00
	PLUS: Substiution Shortfall Interest							0.00
	PLUS: Interest Loan Adjustments							0.00
	LESS: Excess, Special Hazard, Fraud, & Bankruptcy Interest Losses							0.00
	Interest Advanced							101,~~956~~237,943.5179
	TOTAL INTEREST							1,~~846~~584,~~482~~795.8573
				Page 7 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Collection Account Report for June 25, 2004 Distribution
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report
INTEREST - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - OTHER ACCOUNTS								TOTAL
	Prepayment Penalties							5135,~~433~~982.0037
	TOTAL INTEREST OTHER ACCOUNTS							5135,~~433~~982.0037
INTEREST - FEES								TOTAL
	Current Servicing Fees							8816,~~546~~955.3107
	Trustee Fees							21,~~137~~841.0768
				Page 8 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Credit Enhancement Report for June 25, 2004 Distribution
	Credit Enhancement Report for September 27, 2004 Distribution
	Credit Enhancement Report
ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INSURANCE								TOTAL
SPACE INTENTIONALLY LEFT BLANK
STRUCTURAL FEATURES								TOTAL
SPACE INTENTIONALLY LEFT BLANK
				Page 9 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Collateral Report for September 27, 2004 Distribution
	Collateral Report
COLLATERAL								TOTAL
	Loan Count:
	Original							1054
	Prior							~~876~~765
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(3731)
	Repurchases							-(6)
	Liquidations							-
	Current							~~839~~728
	Principal Balance:
	Original							516,507,171.71
	Prior							~~427~~368,~~413~~336,~~830~~324.2830
	Prefunding							-
	Scheduled Principal							(~~500~~442,~~212~~567.4534)
	Partial and Full Voluntary Prepayments							(2016,~~881~~029,~~197~~283.4428)
	Repurchases							-(2,837,580.00)
	Liquidations							-
	Current							~~406~~349,~~032~~026,~~420~~893.3968
PREFUNDING								TOTAL
SPACE INTENTIONALLY LEFT BLANK
Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)
				Page 10 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Collateral Report for September 27, 2004 Distribution
	Collateral Report
CHARACTERISTICS								TOTAL
	Weighted Average Coupon Original							5.464863%
	Weighted Average Coupon Prior							5.~~457917~~422684%
	Weighted Average Coupon Current							5.~~440155~~419093%
	Weighted Average Months to Maturity Original							349
	Weighted Average Months to Maturity Prior							~~347~~344
	Weighted Average Months to Maturity Current							~~346~~343
	Weighted Avg Remaining Amortization Term Original							349
	Weighted Avg Remaining Amortization Term Prior							~~347~~-
	Weighted Avg Remaining Amortization Term Current							~~346~~-
	Weighted Average Seasoning Original							11.44
	Weighted Average Seasoning Prior							~~13.31~~-
	Weighted Average Seasoning Current							~~14.28~~-
Note: Original information refers to deal issue.
WAC by Groups					Total WAC
WARAT by Groups					Total WARAT
Note: Dates correspond to distribution dates.
				Page 11 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Collateral Report for June 25, 2004 Distribution
	Collateral Report for September 27, 2004 Distribution
	Collateral Report
ARM CHARACTERISTICS								TOTAL
	Weighted Average Margin Original							2.758%
	Weighted Average Margin Prior							20.~~759~~000%
	Weighted Average Margin Current							20.~~759~~000%
	Weighted Average Max Rate Original							11.638%
	Weighted Average Max Rate Prior							110.~~625~~000%
	Weighted Average Max Rate Current							110.~~608~~000%
	Weighted Average Min Rate Original							2.761%
	Weighted Average Min Rate Prior							20.~~763~~000%
	Weighted Average Min Rate Current							20.~~764~~000%
	Weighted Average Cap Up Original							2.000%
	Weighted Average Cap Up Prior							20.000%
	Weighted Average Cap Up Current							20.000%
	Weighted Average Cap Down Original							2.000%
	Weighted Average Cap Down Prior							20.000%
	Weighted Average Cap Down Current							20.000%
Note: Original information refers to deal issue.
SERVICING FEES / ADVANCES								TOTAL
	Current Servicing Fees							8816,~~546~~955.3107
	Delinquent Servicing Fees							~~498~~59,781.2466
	TOTAL SERVICING FEES							8976,~~044~~736.5573
	Total Servicing Fees							8976,~~044~~736.5573
	Compensating Interest							(129,~~837~~265.3332)
	Delinquent Servicing Fees							(~~498~~59,781.2466)
	COLLECTED SERVICING FEES							757,~~708~~689.9875
	Total Advanced Principal For Current Payment Date							2362,~~711~~087.6753
	Total Advanced Interest For Current Payment Date							101,~~956~~237,943.5179
	TOTAL ADVANCES FOR CURRENT PERIOD							131,~~668~~600,031.1832
ADDITIONAL COLLATERAL INFORMATION								TOTAL
	Prepayment Interest Shortfall (PPIS)							129,~~837~~265.3332
	Compensating Interest							(129,~~837~~265.3332)
	Net Prepayment Interest Shortfall (Net PPIS)							0.00
	Weighted Average Net Mortgage Rate							5.~~184155~~163093%
				Page 12 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Delinquency Report for June 25, 2004 Distribution
	Delinquency Report for September 27, 2004 Distribution
	Delinquency Report - Total
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		-###########	~~715~~4,~~209~~216,381.9873	~~618~~893,~~219~~217.5071	~~1,055,422.74~~-	25,~~388~~109,~~852~~599.2244
		% Balance		080.0044%	01.1821%	0.1526%	0.2600%	01.5946%
		# Loans		-593	28	12	2-	510
		% # Loans		081.0046%	01.2410%	0.1227%	0.2400%	01.6037%
FORECLOSURE		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY		Balance		-572,877.58	-	-	-	-572,877.58
		% Balance		0.0016%	0.00%	0.00%	0.00%	0.0016%
		# Loans		-1	-	-	-	-1
		% # Loans		0.0014%	0.00%	0.00%	0.00%	0.0014%
REO		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL		Balance		-572,877.58	~~715~~4,~~209~~216,381.9873	~~618~~893,~~219~~217.5071	~~1,055,422.74~~-	25,~~388~~682,~~852~~477.2202
		% Balance		0.0016%	01.1821%	0.1526%	0.2600%	01.5963%
		# Loans		-1	28	12	2-	511
		% # Loans		0.0014%	01.2410%	0.1227%	0.2400%	01.6051%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent
Total Foreclosure					Total Bankruptcy and REO
Note: Dates correspond to distribution dates.
				Page 13 of 25				© COPYRIGHT 2004 Deutsche Bank
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	REO Report for June 25, 2004 Distribution
	REO Report for September 27, 2004 Distribution
	REO Report - Mortgage Loans that Become REO During Current Distribution
SUMMARY				LOAN GROUP
Total Loan Count = 0				Loan Group 1 = Group 1; REO Book Value = 000.00
Total Original Principal Balance = 000.00
Total Current Balance = 000.00
REO Book Value = 000.00
REO Book Value reported corresponds to total REO loans, including loans that become REO during current distribution.
Loan Number		Original	Stated		Current	State &
&		Principal	Principal	Paid to	Note	LTV at	Original	Origination
Loan Group		Balance	Balance	Date	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK
				Page 14 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Prepayment Report for June 25, 2004 Distribution
	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENTS								TOTAL
	Current
	Number of Paid in Full Loans							3731
	Number of Repurchased Loans							-6
	Total Number of Loans Prepaid in Full							37
	Paid in Full Balance							2015,~~743~~887,~~428~~061.4971
	Repurchased Loans Balance							-2,837,580.00
	Curtailments Amount							~~137~~142,~~768~~221.9557
	Total Prepayment Amount							2018,~~881~~866,~~197~~863.4428
	Cumulative
	Number of Paid in Full Loans							~~215~~320
	Number of Repurchased Loans							-6
	Total Number of Loans Prepaid in Full							~~215~~326
	Paid in Full Balance							~~107~~159,~~423~~905,~~138~~465.7502
	Repurchased Loans Balance							-2,837,580.00
	Curtailments Amount							~~875~~1,~~194~~178,608.6098
	Total Prepayment Amount							~~108~~163,~~298~~921,~~333~~654.3500
SPACE INTENTIONALLY LEFT BLANK
Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)
				Page 15 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENT RATES								TOTAL
	SMM							45.8913%
	3 Months Avg SMM							64.2480%
	12 Months Avg SMM
	Avg SMM Since Cut-off							5.7334%
	CPR							4546.2283%
	3 Months Avg CPR							5344.8461%
	12 Months Avg CPR
	Avg CPR Since Cut-off							5048.7521%
	PSA							~~1583~~780.6056%
	3 Months Avg PSA Approximation							~~2022~~743.7253%
	12 Months Avg PSA Approximation
	Avg PSA Since Cut-off Approximation							~~1975~~1193.7347%
CPR by Groups					Total CPR
PSA by Groups					Total PSA
				Page 16 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Prepayment Report - Voluntary Prepayments
CPR Avg since Cut-Off by Groups					Total CPR Avg since Cut-Off
PSA Avg since Cut-Off by Groups					Total PSA Avg since Cut-Off
PREPAYMENT CALCULATION METHODOLOGY
Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)
Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
PSA Standard Prepayment Model: CPR/(0.02*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 and repurchases.
Dates correspond to distribution dates.
				Page 17 of 25				© COPYRIGHT 2004 Deutsche Bank
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	Prepayment Detail Report for June 25, 2004 Distribution
	Prepayment Detail Report for September 27, 2004 Distribution
	Prepayment Detail Report - Loans Prepaid in Full During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 37						Loan Group 1 = Group 1
Total Original Principal Balance = 21,075,800.00
Total Original Principal Balance = 19,111,942.00
Total Prepayment Amount = 20,743,428.49
Total Prepayment Amount = 18,724,641.71
Loan Number			Original			Current	State &	Type Prepayment
&		Loan	Principal	Prepayment	Prepayment	Note	LTV at	&	Origination
Loan Group		Status	Balance	Amount	Date	Rate	Origination	Original Term	Date
1761376 1			464,000.00	454,529.43	May-27-04	6.125%	CA - 80.00%	Paid Off - 360	Aug-26-02
1250781 1			600,000.00	580,106.78	Sep-02-04	7.500%	DC - 71.43%	Paid Off - 360	Aug-30-01
1797979 1			424,000.00	416,351.04	Jun-03-04	6.500%	CA - 80.00%	Paid Off - 360	Sep-18-02
1826756 1			372,000.00	362,768.69	Aug-18-04	5.250%	CA - 80.00%	Paid Off - 360	Aug-16-02
1854028 1			550,000.00	538,928.98	Jun-09-04	6.000%	SC - 74.93%	Paid Off - 360	Sep-09-02
1835422 1			543,750.00	523,643.77	Aug-31-04	5.250%	CA - 75.00%	Paid Off - 360	Aug-23-02
1860441 1			472,000.00	461,322.95	May-25-04	5.875%	CA - 80.00%	Paid Off - 360	Oct-05-02
1911657 1			360,000.00	351,723.06	Aug-30-04	5.375%	CA - 72.00%	Paid Off - 360	Oct-25-02
1883365 1			352,000.00	345,438.83	May-18-04	5.375%	AZ - 80.00%	Paid Off - 360	Oct-25-02
1921126 1			372,000.00	363,920.24	Aug-18-04	5.500%	CA - 80.00%	Paid Off - 360	Nov-06-02
1885292 1			380,000.00	372,341.47	May-24-04	5.625%	CA - 78.35%	Paid Off - 360	Oct-08-02
1936197 1			363,000.00	354,835.51	Aug-31-04	5.875%	VA - 79.96%	Paid Off - 360	Oct-11-02
1898124 1			1,300,000.00	1,281,679.69	Jun-01-04	7.500%	MD - 65.00%	Paid Off - 360	Oct-24-02
1957336 1			635,000.00	621,231.86	Aug-23-04	5.625%	MO - 79.28%	Paid Off - 360	Oct-28-02
1941883 1			384,000.00	376,288.26	Jun-10-04	5.250%	CA - 80.00%	Paid Off - 360	Oct-10-02
1962053 1			363,000.00	354,947.87	Aug-30-04	5.500%	CA - 76.42%	Paid Off - 360	Oct-28-02
1949691 1			401,000.00	392,717.27	Jun-01-04	5.125%	CA - 61.69%	Paid Off - 360	Nov-14-02
1991825 1			483,000.00	471,886.84	Sep-03-04	5.750%	CA - 79.83%	Paid Off - 360	Oct-29-02
1962247 1			400,000.00	391,977.50	Jun-14-04	5.375%	CA - 80.00%	Paid Off - 360	Oct-10-02
2016675 1			510,000.00	492,013.81	Sep-01-04	5.750%	CA - 69.86%	Paid Off - 360	Dec-16-02
1972827 1			608,000.00	596,262.14	Jun-15-04	5.500%	CA - 73.25%	Paid Off - 360	Mar-26-02
2028048 1			600,000.00	585,379.80	Aug-18-04	5.125%	FL - 70.59%	Paid Off - 360	Oct-29-02
2005904 1			461,240.00	452,648.38	May-20-04	5.250%	CA - 75.00%	Paid Off - 360	Nov-07-02
2042164 1			368,800.00	360,325.37	Aug-17-04	5.250%	CA - 80.00%	Paid Off - 360	Dec-03-02
2017169 1			350,000.00	344,608.51	Jun-04-04	6.500%	VA - 72.92%	Paid Off - 360	Dec-18-02
2078030 1			524,000.00	513,108.87	Sep-01-04	5.500%	FL - 80.00%	Paid Off - 360	Jan-31-03
2020769 1			435,572.00	427,621.09	Jun-08-04	5.250%	CA - 80.00%	Paid Off - 360	Dec-18-02
2095498 1			457,700.00	450,129.88	Sep-07-04	6.000%	GA - 62.93%	Paid Off - 360	Mar-03-03
2055350 1			512,000.00	502,227.55	Jun-02-04	5.625%	CA - 80.00%	Paid Off - 360	Nov-15-02
2131882 1			476,000.00	467,165.74	Aug-19-04	5.875%	CA - 80.00%	Paid Off - 360	Feb-07-03
2055890 1			500,000.00	490,923.16	May-24-04	5.250%	CA - 78.74%	Paid Off - 360	Dec-06-02
2159409 1			350,000.00	343,236.59	Aug-19-04	5.125%	CT - 46.98%	Paid Off - 360	Feb-05-03
2061488 1			391,200.00	385,165.89	May-20-04	6.375%	CA - 80.00%	Paid Off - 360	Dec-03-02
2238268 1			616,000.00	604,894.80	Sep-15-04	5.875%	CA - 80.00%	Paid Off - 360	Feb-10-03
2069973 1			452,000.00	444,140.03	May-20-04	5.625%	CA - 80.00%	Paid Off - 360	Nov-19-02
2271470 1			496,000.00	487,058.07	Aug-24-04	5.875%	CA - 80.00%	Paid Off - 360	Feb-21-03
2099156 1			568,000.00	557,703.31	Jun-10-04	5.500%	CA - 80.00%	Paid Off - 360	Dec-13-02
2290835 1			416,000.00	408,958.91	Sep-01-04	5.875%	MD - 80.00%	Paid Off - 360	Mar-17-03
2113352 1			400,000.00	390,530.94	Jun-04-04	5.375%	CA - 57.14%	Paid Off - 360	Jan-21-03
2298454 1			700,000.00	680,441.25	Sep-09-04	5.250%	NY - 56.00%	Paid Off - 360	Mar-07-03
2119756 1			1,335,380.00	1,313,964.67	May-18-04	5.625%	CA - 62.11%	Paid Off - 360	Aug-29-01
2310134 1			352,500.00	344,543.74	Sep-01-04	5.500%	CA - 75.00%	Paid Off - 360	Feb-26-03
2123170 1			975,000.00	958,841.37	May-24-04	5.625%	HI - 69.64%	Paid Off - 360	Jan-10-03
2311682 1			1,500,000.00	1,469,017.11	Aug-26-04	5.125%	CA - 68.18%	Paid Off - 360	Feb-05-03
2137951 1			360,000.00	354,928.89	May-20-04	6.500%	NJ - 68.57%	Paid Off - 360	Jan-03-03
2316708 1			449,500.00	441,208.53	Aug-24-04	5.750%	CA - 79.23%	Paid Off - 360	Feb-19-03
2273419 1			390,400.00	384,819.07	May-18-04	5.625%	IL - 80.00%	Paid Off - 360	Mar-28-03
2336978 1			566,250.00	556,081.65	Aug-19-04	5.375%	CA - 75.00%	Paid Off - 360	Mar-11-03
2273465 1			350,000.00	344,371.94	May-21-04	5.125%	CA - 74.47%	Paid Off - 360	Mar-07-03
2405408 1			560,000.00	551,136.02	Sep-01-04	5.875%	DC - 80.00%	Paid Off - 360	Apr-17-03
2284621 1			470,850.00	462,963.23	May-19-04	4.750%	CA - 80.00%	Paid Off - 360	Mar-13-03
2445329 1			440,000.00	432,539.51	Sep-01-04	5.500%	CA - 80.00%	Paid Off - 360	Apr-10-03
2301826 1			481,200.00	474,161.41	May-24-04	5.500%	CA - 80.00%	Paid Off - 360	Mar-05-03
2512296 1			840,000.00	826,545.99	Sep-01-04	5.000%	CA - 70.00%	Paid Off - 360	Feb-11-02
2386442 1			610,000.00	600,585.82	May-25-04	5.375%	CA - 75.31%	Paid Off - 360	Apr-01-03
2594520 1			649,990.00	640,262.80	Sep-07-04	5.375%	NV - 79.36%	Paid Off - 360	Jun-24-03
2473782 1			360,000.00	355,150.48	Jun-08-04	5.500%	CA - 63.72%	Paid Off - 360	Apr-22-03
2693912 1			360,000.00	350,423.96	Aug-19-04	4.625%	CA - 80.00%	Paid Off - 360	Jul-14-03
2547687 1			450,000.00	443,926.81	Jun-01-04	5.000%	CA - 60.00%	Paid Off - 360	May-06-03
2716465 1			560,000.00	553,282.06	Aug-26-04	6.125%	CA - 80.00%	Paid Off - 360	Jul-18-03
2620225 1			1,400,000.00	1,382,777.96	Jun-04-04	4.375%	MI - 63.64%	Paid Off - 360	Dec-19-02
2863920 1			348,000.00	344,242.63	Sep-01-04	5.250%	FL - 80.00%	Paid Off - 360	Oct-09-03
2693936 1			400,000.00	395,466.07	May-21-04	5.375%	CA - 80.00%	Paid Off - 360	Jul-09-03
1847940 1			720,000.00	705,525.45	Aug-31-04	6.750%	SC - 80.00%	Repur/Subs - 360	Sep-11-02
2706024 1			740,000.00	730,693.19	Jun-02-04	4.250%	NV - 56.92%	Paid Off - 360	Jul-25-03
1855043 1			410,000.00	401,969.31	Aug-31-04	6.625%	NY - 63.57%	Repur/Subs - 360	Oct-07-02
2715444 1			590,000.00	582,901.72	Jun-14-04	4.500%	CA - 35.76%	Paid Off - 360	Jul-21-03
1956713 1			411,000.00	402,949.53	Aug-31-04	6.625%	NJ - 60.89%	Repur/Subs - 360	Nov-01-02
2817093 1			1,365,000.00	1,349,469.20	May-28-04	5.000%	CA - 65.00%	Paid Off - 360	Jul-24-02
2724709 1			380,000.00	376,298.18	Aug-31-04	6.750%	CA - 80.00%	Repur/Subs - 360	Aug-25-03
2825177 1			524,208.00	518,573.51	Jun-15-04	5.125%	CA - 80.00%	Paid Off - 360	Jul-30-03
2921301 1			488,000.00	483,690.44	Aug-31-04	6.750%	CA - 80.00%	Repur/Subs - 360	Sep-02-03
3045405 1			468,750.00	466,426.73	May-28-04	6.125%	CA - 75.00%	Paid Off - 360	Nov-07-03
2966361 1			470,452.00	467,147.09	Aug-31-04	6.750%	CO - 79.66%	Repur/Subs - 360	Nov-17-03
					Page 18 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
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	Realized Loss Report for June 25, 2004 Distribution
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report - Collateral
COLLATERAL REALIZED LOSSES								TOTAL
	Current
	Number of Loans Liquidated							-
	Collateral Realized Loss/(Gain) Amount							-
	Net Liquidation Proceeds							-
	Cumulative
	Number of Loans Liquidated							-
	Collateral Realized Loss/(Gain) Amount							-
	Net Liquidation Proceeds							-
	Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.
	Current Realized Losses							0.00
	Supplemental Losses (Recoveries)							0.00
	Current Net Realized Losses (Recoveries)							0.00
	Prior Cumulative Realized Loss							0.00
	Current Net Realized Loss (Recoveries)							0.00
	Current Cumulative Realized Loss							0.00
	Current Special Hazard Loss Coverage Amount							5,~~887~~868,~~791~~091.7634
	Current Fraud Loss Coverage Amount							15,495,215.15
	Current Bankruptcy Loss Coverage Amount							150,000.00
	Class B-1 Write Down Amount							0.00
	Class B-2 Write Down Amount							0.00
	Class B-3 Write Down Amount							0.00
	Class B-4 Write Down Amount							0.00
	Class B-5 Write Down Amount							0.00
	Class B-6 Write Down Amount							0.00
							3 Months Moving Average
Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation
				Page 19 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Realized Loss Report for June 25, 2004 Distribution
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report - Collateral
DEFAULT SPEEDS								TOTAL
	MDR							0.00%
	3 Months Avg MDR							0.00%
	12 Months Avg MDR
	Avg MDR Since Cut-off							0.00%
	CDR							0.00%
	3 Months Avg CDR							0.00%
	12 Months Avg CDR
	Avg CDR Since Cut-off							0.00%
	SDA							0.00%
	3 Months Avg SDA Approximation							0.00%
	12 Months Avg SDA Approximation
	Avg SDA Since Cut-off Approximation							0.00%
	Loss Severity Approximation for Current Period
	3 Months Avg Loss Severity Approximation
	12 Months Avg Loss Severity Approximation
	Avg Loss Severity Approximation Since Cut-off
CDR by Groups					Total CDR
SDA by Groups					Total SDA
				Page 20 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Realized Loss Report for June 25, 2004 Distribution
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report - Collateral
CDR Avg since Cut-Off by Groups					Total CDR Avg since Cut-Off
SDA Avg since Cut-Off by Groups					Total SDA Avg since Cut-Off
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 21 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Realized Loss Detail Report for June 25, 2004 Distribution
	Realized Loss Detail Report for September 27, 2004 Distribution
	Realized Loss Detail Report - Loans Liquidated During Current Distribution
SUMMARY							LOAN GROUP
Total Loan Count Current Losses = 0
Total Loan Count Revisions = 0						Loan Group 1 = Group 1
Total Prior Principal Balance = 0.00
Total Current Realized Loss Amount = 0.00
Total Revisions Amount = 0.00
Total Realized Loss Amount = 0.00
Total Net Liquidation Proceeds = 0.00
Note: Total Realized Loss Amount may include adjustments to loans liquidated in prior periods.
Loan Number			Current	State &		Prior	Realized		Cumulative
&		Loan	Note	LTV at	Original	Principal	Loss/(Gain)	Realized	Realized
Loan Group		Status	Rate	Origination	Term	Balance	Revisions	Loss/(Gain)	Loss/(Gain)
SPACE INTENTIONALLY LEFT BLANK
					Page 22 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Triggers, Adj. Rate Cert. and Miscellaneous Report for June 25, 2004 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report for September 27, 2004 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report
TRIGGER EVENTS								TOTAL
	Has the Bankruptcy Coverage Termination Date occurred?							No
	Have the Fraud Loss Coverage Termination Date occurred?							No
	Has the Senior Step Down Conditions occurred?							No
	Has the Special Hazard Coverage Termination Date occurred?							No
	Has the Two Times Test occurred?							No
ADJUSTABLE RATE CERTIFICATE INFORMATION								TOTAL
SPACE INTENTIONALLY LEFT BLANK
ADDITIONAL INFORMATION								TOTAL
	Current Senior Percentage							9291.~~472772~~296451%
	Next Senior Percentage							9290.~~085666~~896735%
	Current Subordinate Percentage							78.~~527228~~703549%
	Next Subordinate Percentage							79.~~914334~~103265%
	Current Senior Prepayment Percentage							100.000000%
	Next Projected Senior Prepayment Percentage							100.000000%
	Current Subordinated Prepayment Percentage							0.000000%
	Next Projected Subordinated Prepayment Percentage							0.000000%
	Next Projected Pass-Through Rate for Class A-1							43.~~014971~~982081%
	Next Projected Pass-Through Rate for Class A-1X							1.171997%
	Next Projected Pass-Through Rate for Class B-1							4.~~478201~~445311%
	Next Projected Pass-Through Rate for Class B-1X							0.708767%
				Page 23 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Other Related Information for June 25, 2004 Distribution
	Other Related Information for September 27, 2004 Distribution
	Other Related Information
ADDITIONAL INFORMATION								TOTAL
	Next Projected Pass-Through Rate for all other classes							5.~~186968~~154078%
	Scheduled Principal
	1 Month Prior							0.00
	2 Months Prior							0.00
	3 Months Prior							0.00
	4 Months Prior							0.00
	5 Months Prior							0.00
	6 Months Prior							0.00
	7 Months Prior							0.00
	8 Months Prior							0.00
	9 Months Prior							0.00
	10 Months Prior							0.00
	11 Months Prior							0.00
	12 Months Prior							0.00
	Scheduled Principal on 60+ Day Delinquent Loans
	1 Month Prior							0.00
	2 Months Prior							0.00
	3 Months Prior							0.00
	4 Months Prior							0.00
	5 Months Prior							0.00
	6 Months Prior							0.00
	7 Months Prior							0.00
	8 Months Prior							0.00
	9 Months Prior							0.00
	10 Months Prior							0.00
	11 Months Prior							0.00
	12 Months Prior							0.00
				Page 24 of 25				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-IndyPort1
	Mortgage Pass-Through Certificates
	Additional Certificate Report for June 25, 2004 Distribution
	Additional Certificate Report for September 27, 2004 Distribution
	Additional Certificate Report
	CLASS				Net PPIS & Relief Act Shortfall Allocation	Unpaid Interest Amount Due	Unpaid Interest Paid	Remaining Unpaid Interest Amount
	A-1				0.00	0.00	0.00	0.00
	A-1X				0.00	0.00	0.00	0.00
	A-R				0.00	0.00	0.00	0.00
	B-1				0.00	0.00	0.00	0.00
	B-1X				0.00	0.00	0.00	0.00
	B-2				0.00	0.00	0.00	0.00
	B-3				0.00	0.00	0.00	0.00
	B-4				0.00	0.00	0.00	0.00
	B-5				0.00	0.00	0.00	0.00
	B-6				0.00	0.00	0.00	0.00
	P				0.00	0.00	0.00	0.00
				Page 25 of 25				© COPYRIGHT 2004 Deutsche Bank

Filing Compare · RESIDENTIAL ASSET SECURITIZATION TRUST SERIES 2004-INDYPORT1