IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

External Parties

Table of Contents

Page

Seller

1. Certificate Payment Report

IndyMac Bank, F.S.B.

2. Collection Account Report

3. Credit Enhancement Report

Servicer(s)

4. Collateral Report

IndyMac Bank, F.S.B.

5. Delinquency Report

6. REO Report

Underwriter(s)

7. Foreclosure Report

Goldman, Sachs & Co.

8. Prepayment Report

9. Prepayment Detail Report

Cap Counterparty

10. Realized Loss Report

Bear Stearns Financial Prd.Inc

11. Realized Loss Detail Report

12. Triggers and Adj. Cert. Report

13. Additional Certificate Report

14. Other Related Information

Total Number of Pages

Dates

Contacts

Cut-Off Date:

July 01, 2007

Jennifer Hermansader

Close Date:

July 30, 2007

Administrator

First Distribution Date:

August 27, 2007

(714) 247-6258

Jennifer.Vandyne@db.com

Address:

Distribution Date:

November 26, 2007

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

Record Date:

October 31, 2007

Factor Information:

(800) 735-7777

November 23, 2007

Main Phone Number:

(714) 247-6000

Determination Date:

November 15, 2007

https://tss.sfs.db.com/investpublic

Page 1 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution

Certificate Payment Report
Current Period Distribution - REMIC II
			Prior						Current
			Prior

	Class	Original	Principal			Total	Realized	Deferred	Principal

Class	Type	Face Value	Balance	Interest	Principal	Distribution	Loss	Interest	Balance
			(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
A-1	SR	144,457,000.00	135,578,284.40	605,173.94	4,263,456.05	4,868,629.99	0.00	0.00	131,314,828.35
A-1	SR	144,457,000.00	135,578,284.40	605,173.94	4,263,456.05	4,868,629.99	0.00	0.00	131,314,828.35
A-2	SR	69,581,000.00	69,581,000.00	316,769.07	0.00	316,769.07	0.00	0.00	69,581,000.00
A-3	SR	44,028,000.00	44,028,000.00	204,742.66	0.00	204,742.66	0.00	0.00	44,028,000.00
A-4	SR/SUP	28,675,000.00	27,688,441.64	128,513.01	473,733.86	602,246.87	0.00	0.00	27,214,707.78
A-X	SR/NTL	0.00	0.00	302,597.79	0.00	302,597.79	0.00	0.00	0.00
A-R	RES/SR	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
B-1	SUB	11,914,475.00	11,897,757.33	66,940.81	11,078.84	78,019.65	0.00	0.00	11,886,678.49
B-2	SUB	6,354,386.00	6,345,469.92	35,701.76	5,908.71	41,610.47	0.00	0.00	6,339,561.21
B-3	SUB	2,382,895.00	2,379,551.47	13,388.16	2,215.77	15,603.93	0.00	0.00	2,377,335.70
B-4	NOF/SUB	5,242,369.00	5,235,013.22	29,453.95	4,874.69	34,328.64	0.00	0.00	5,230,138.53
B-5	NOF/SUB	1,270,877.00	1,269,093.78	7,140.35	1,181.74	8,322.09	0.00	0.00	1,267,912.04
B-6	NOF/SUB	3,813,233.76	3,807,883.26	21,424.44	3,545.79	24,970.23	0.00	0.00	3,804,337.47
P-1	NOF	100.00	100.00	0.00	0.00	0.00	0.00	0.00	100.00
P-2	NOF	100.00	100.00	0.00	0.00	0.00	0.00	0.00	100.00
L	NOF	0.00	0.00	8,581.43	0.00	8,581.43	0.00	0.00	0.00


Total		317,719,535.76	307,810,695.02	1,740,427.37	4,765,995.45	6,506,422.82	0.00	0.00	303,044,699.57
Total




Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face Value
					Orig. Principal	Prior				Current
					Orig. Principal	Prior				Current
	Period	Period			(with Notional)	Principal			Total	Principal
Class	Starting	Ending	Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
			Method
					(1)	(1)	(2)	(3)	(4)=(2)+(3)	(5)

A-1	10/25/07	11/25/07	A-Act/360	45670EAA1	144,457,000.00	938.537311	4.189302	29.513669	33.702970	909.023643
A-1	10/25/07	11/25/07	A-Act/360	45670EAA1	144,457,000.00	938.537311	4.189302	29.513669	33.702970	909.023643
A-2	10/25/07	11/25/07	A-Act/360	45670EAB9	69,581,000.00	1,000.000000	4.552523	0.000000	4.552523	1,000.000000
A-3	10/25/07	11/25/07	A-Act/360	45670EAC7	44,028,000.00	1,000.000000	4.650283	0.000000	4.650283	1,000.000000
A-4	10/25/07	11/25/07	A-Act/360	45670EAD5	28,675,000.00	965.595175	4.481709	16.520797	21.002506	949.074378
A-X	10/25/07	11/24/07	A-30/360	45670EAQ6	286,741,100.00	965.594838	1.055300	0.000000	1.055300	949.074047
A-R	10/01/07	10/30/07	A-30/360	45670EAE3	100.00	0.000000	0.000000	0.000000	0.000000	0.000000
B-1	10/01/07	10/30/07	A-30/360	45670EAF0	11,914,475.00	998.596861	5.618444	0.929864	6.548308	997.666997
B-2	10/01/07	10/30/07	A-30/360	45670EAG8	6,354,386.00	998.596862	5.618444	0.929863	6.548307	997.666999
B-3	10/01/07	10/30/07	A-30/360	45670EAH6	2,382,895.00	998.596862	5.618443	0.929865	6.548308	997.666997
B-4	10/01/07	10/30/07	A-30/360	45670EAJ2	5,242,369.00	998.596860	5.618443	0.929864	6.548307	997.666996
B-5	10/01/07	10/30/07	A-30/360	45670EAK9	1,270,877.00	998.596859	5.618443	0.929862	6.548305	997.666997
B-6	10/01/07	10/30/07	A-30/360	45670EAL7	3,813,233.76	998.596860	5.618444	0.929864	6.548308	997.666996
P-1		45670EAM5	100.00	1,000.000000	0.000000	0.000000	0.000000	1,000.000000
P-2		45670EAP8	100.00	1,000.000000	0.000000	0.000000	0.000000	1,000.000000
L		45670EAN3	0.00	0.000000	0.000000	0.000000	0.000000	0.000000




Page 2 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution


Distribution to Date - REMIC II
									Current


	Original		Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal

Class	Face Value	Interest	Principal	Principal	Principal	Distribution	Loss	Interest	Balance
(1)	(2)	(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
A-1	144,457,000.00	2,469,489.70	12,993,678.76	148,492.89	13,142,171.65	15,611,661.35	0.00	0.00	131,314,828.35
A-2	69,581,000.00	1,252,812.30	0.00	0.00	0.00	1,252,812.30	0.00	0.00	69,581,000.00
A-3	44,028,000.00	808,736.50	0.00	0.00	0.00	808,736.50	0.00	0.00	44,028,000.00
A-4	28,675,000.00	516,114.91	1,443,792.43	16,499.79	1,460,292.22	1,976,407.13	0.00	0.00	27,214,707.78
A-X	0.00	1,297,335.81	0.00	0.00	0.00	1,297,335.81	0.00	0.00	0.00
A-R	100.00	0.56	98.89	1.11	100.00	100.56	0.00	0.00	0.00
B-1	11,914,475.00	268,243.29	27,509.90	286.61	27,796.51	296,039.80	0.00	0.00	11,886,678.49
B-2	6,354,386.00	143,063.08	14,671.93	152.86	14,824.79	157,887.87	0.00	0.00	6,339,561.21
B-3	2,382,895.00	53,648.66	5,501.98	57.32	5,559.30	59,207.96	0.00	0.00	2,377,335.70
B-4	5,242,369.00	118,027.04	12,104.36	126.11	12,230.47	130,257.51	0.00	0.00	5,230,138.53
B-5	1,270,877.00	28,612.61	2,934.39	30.57	2,964.96	31,577.57	0.00	0.00	1,267,912.04
B-6	3,813,233.76	85,851.40	8,804.56	91.73	8,896.29	94,747.69	0.00	0.00	3,804,337.47
P-1	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	100.00
P-2	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	100.00
L	0.00	13,496.46	0.00	0.00	0.00	13,496.46	0.00	0.00	0.00


Total	317,719,535.76	7,055,432.32	14,509,097.20	165,738.99	14,674,836.19	21,730,268.51	0.00	0.00	303,044,699.57


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

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

Class	Rate	Balance	Interest	Interest SF	Interest	Adjustment	Interest	Interest	Interest
			(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
A-1	5.02250%	135,578,284.40	605,281.72	107.78	0.00	0.00	605,173.94	605,173.94	0.00
A-2	5.12250%	69,581,000.00	316,825.49	56.42	0.00	0.00	316,769.07	316,769.07	0.00
A-3	5.23250%	44,028,000.00	204,779.12	36.46	0.00	0.00	204,742.66	204,742.66	0.00
A-4	5.22250%	27,688,441.64	128,535.90	22.89	0.00	0.00	128,513.01	128,513.01	0.00
A-X	1.31171%	276,875,726.04	302,651.69	53.89	0.01	0.00	302,597.81	302,597.79	0.02
A-R	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
B-1	6.75281%	11,897,757.33	66,952.73	11.92	0.00	0.00	66,940.81	66,940.81	0.00
B-2	6.75281%	6,345,469.92	35,708.12	6.36	0.00	0.00	35,701.76	35,701.76	0.00
B-3	6.75281%	2,379,551.47	13,390.55	2.38	0.00	0.00	13,388.17	13,388.16	0.00
B-4	6.75281%	5,235,013.22	29,459.20	5.25	0.00	0.00	29,453.95	29,453.95	0.00
B-5	6.75281%	1,269,093.78	7,141.62	1.27	0.00	0.00	7,140.35	7,140.35	0.00
B-6	6.75281%	3,807,883.26	21,428.25	3.82	0.00	0.00	21,424.43	21,424.44	0.00
P-1	0.00000%	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
P-2	0.00000%	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
L	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	8,581.43	0.00


Total		584,686,421.06	1,732,154.39	308.44	0.01	0.00	1,731,845.96	1,740,427.37	0.02



Page 3 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

Collection Account Report

SUMMARY

Total

Principal Collections

4,765,995.45

Principal Withdrawals

0.00

Principal Other Accounts

0.00

TOTAL NET PRINCIPAL

4,765,995.45

Interest Collections

1,808,784.94

Interest Withdrawals

-0.00

Interest Other Accounts

8,581.43

Interest Fees

-76,939.00

TOTAL NET INTEREST

1,740,427.37

TOTAL AVAILABLE FUNDS FOR DISTRIBUTION

6,506,422.82

PRINCIPAL - COLLECTIONS

Total

Scheduled Principal Received

36,252.27

Curtailments

208,760.00

Prepayments In Full

4,270,611.46

Repurchased/Substitutions

250,371.72

Liquidations

0.00

Delinquent Principal

-10,309.58

Realized Losses

-0.00

Advanced Principal

10,309.58

TOTAL PRINCIPAL COLLECTED

4,765,995.45

PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK

PRINCIPAL - OTHER ACCOUNTS

Total

TOTAL PRINCIPAL OTHER ACCOUNTS

0.00

Page 4 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

INTEREST - COLLECTIONS

Total

Scheduled Interest

1,836,223.26

Repurchased/Substitution Interest

1,616.98

Liquidation Interest

0.00

Prepayment Interest Shortfalls

-5,092.99

Delinquent Interest

-569,762.48

Interest Realized Losses

-0.00

Compensating Interest

5,092.99

Civil Relief Act Shortfalls

-308.44

Interest Advanced

541,015.62

TOTAL INTEREST COLLECTED

1,808,784.94

INTEREST - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK

INTEREST - OTHER ACCOUNTS

Total

Hard Prepayment Charges Collected. *

Hard Prepayment Charges Waived. *

Hard Prepayment Charges paid by the servicer.

0.00

Soft Prepayment Charges Collected. *

Soft Prepayment Charges Waived. *

Soft Prepayment Charges paid by the servicer.

0.00

Late Payment Fee collected. *

Late Payment Fee waived

809.55

Late Payment Fee paid by the servicer

8,581.43

Amount received from Cap Counterparty

0.00

TOTAL INTEREST OTHER ACCOUNTS

8,581.43

* Information not available with Trustee

Page 5 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

INTEREST FEES

Total

Current Servicing Fees

67,443.92

Trustee Fees

2,180.32

PMI

7,314.76

REMIC Tax Filing Fee

0.00

TOTAL INTEREST FEES

76,939.00

Page 6 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

Credit Enhancement Report

ACCOUNTS

Carryover Reserve Fund

Initial Deposit

1,000.00

Beginning Balance

1,000.00

Amount Deposited

0.00

Amount Withdrawn

0.00

Ending Balance

1,000.00

Distribution Account

Beginning Balance

0.00

Amount Deposited

6,508,603.15

Amount Withdrawn

6,508,603.15

Ending Balance

0.00

Supplemental Interest Reserve Fund

Beginning Balance

0.00

Amount Deposited

0.00

Amount Withdrawn

0.00

Ending Balance

0.00

INSURANCE

SPACE INTENTIONALLY LEFT BLANK

STRUCTURAL FEATURES

SPACE INTENTIONALLY LEFT BLANK

Page 7 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

Collateral Report

COLLATERAL

Total

Loan Count:

Original

978

Prior

953

Prefunding

Scheduled Paid Offs

-0

Full Voluntary Prepayments

-9

Repurchases

-1

Liquidations

-0

Current

943

Principal Balance:

Original

317,719,335.76

Prior

307,810,495.02

Prefunding

0.00

Scheduled Principal

-36,252.27

Partial Prepayments

-208,760.00

Full Voluntary Prepayments

-4,270,611.46

Repurchases

-250,371.72

Liquidations

-0.00

Current

303,044,499.57

Stated Principal Balance of Substitute Mortgage Loans

0.00

PREFUNDING

SPACE INTENTIONALLY LEFT BLANK

Page 8 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution



CHARACTERISTICS
CHARACTERISTICS

							Total
Weighted Average Coupon Original							7.18187%
Weighted Average Coupon Prior							7.16941%
Weighted Average Coupon Current							7.16482%
Weighted Average Months to Maturity Original							355
Weighted Average Months to Maturity Prior							353
Weighted Average Months to Maturity Current							352
Weighted Avg Remaining Amortization Term Original							356
Weighted Avg Remaining Amortization Term Prior							354
Weighted Avg Remaining Amortization Term Current							353
Weighted Average Seasoning Original							5.27
Weighted Average Seasoning Prior							7.30
Weighted Average Seasoning Current							8.30

Page 9 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution



ARM CHARACTERISTICS
ARM CHARACTERISTICS

							Total
Weighted Average Margin Original							2.86373%
Weighted Average Margin Prior							2.84688%
Weighted Average Margin Current							2.84385%
Weighted Average Max Rate Original							12.59548%
Weighted Average Max Rate Prior							12.58462%
Weighted Average Max Rate Current							12.57785%
Weighted Average Min Rate Original							2.86373%
Weighted Average Min Rate Prior							2.84688%
Weighted Average Min Rate Current							2.84385%
Weighted Average Cap Up Original							1.55218%
Weighted Average Cap Up Prior							1.55393%
Weighted Average Cap Up Current							1.55296%
Weighted Average Cap Down Original							1.55218%
Weighted Average Cap Down Prior							1.55393%
Weighted Average Cap Down Current							1.55296%





Page 10 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

SERVICING FEES & ADVANCES

Total

Current Servicing Fees

67,443.92

Delinquent Servicing Fees

28,746.86

TOTAL SERVICING FEES

96,190.78

Total Servicing Fees

96,190.78

Compensating Interest

-5,092.99

Delinquent Servicing Fees

-28,746.86

COLLECTED SERVICING FEES

62,350.94

Total Advanced Interest

541,015.62

Total Advanced Principal

10,309.58

Aggregate Advances with respect to this Distribution

551,325.20

Any additional servicing compensation received by the

Servicer attributable to penalties, fees, Excess Proceeds

or other similar charges or fees and items. *

The aggregate amount of Advances reimbursed

during the related Due Period and

the general source of funds for such reimbursements. *

The aggregate amount of Advances outstanding as

of the close of business on the Determination Date. *

The aggregate amount of Servicing Advances

reimbursed during the related Due Period. *

The general source of funds for such reimbursements. *

The aggregate amount of Servicing Advances outstanding

as of the close of business on the Determination Date. *

The aggregate number and outstanding Stated Principal

Balance of Mortgage Loans repurchased during the related

Due Period due to material breaches of representations and

warranties regarding such Mortgage Loans. *

* Information not available with Trustee

ADDITIONAL COLLATERAL INFORMATION

Total

Prepayment Interest Shortfall (PPIS)

5,092.99

Compensating Interest

(5,092.99)

Net Prepayment Interest Shortfall (PPIS)

0.00

Weighted Average Net Mortgage Rate

6.752808%

Page 11 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution

Delinquency Report

TOTAL
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		17,012,133.34	10,719,775.26	7,315,795.64	35,047,704.24
	% Balance		5.61%	3.54%	2.41%	11.57%
	# Loans		58	30	22	110
	% # Loans		6.15%	3.18%	2.33%	11.66%
FORECLOSURE	Balance	0.00	0.00	0.00	3,886,623.05	3,886,623.05
	% Balance	0.00%	0.00%	0.00%	1.28%	1.28%
	# Loans	0	0	0	12	12
	% # Loans	0.00%	0.00%	0.00%	1.27%	1.27%
BANKRUPTCY	Balance	0.00	0.00	0.00	225,055.00	225,055.00
	% Balance	0.00%	0.00%	0.00%	0.07%	0.07%
	# Loans	0	0	0	1	1
	% # Loans	0.00%	0.00%	0.00%	0.11%	0.11%
REO	Balance	0.00	0.00	0.00	0.00	0.00
	% Balance	0.00%	0.00%	0.00%	0.00%	0.00%
	# Loans	0	0	0	0	0
	% # Loans	0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL	Balance	0.00	17,012,133.34	10,719,775.26	11,427,473.69	39,159,382.29
	% Balance	0.00%	5.61%	3.54%	3.77%	12.92%
	# Loans	0	58	30	35	123
	% # Loans	0.00%	6.15%	3.18%	3.71%	13.04%

Page 12 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 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

Page 13 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution

Foreclosure Report
Loan Number	Original	Stated		Current	State &		First
Loan Number	Original	Stated		Current	State &		First
&	Principal	Principal	Paid to	Note	LTV at	Original	Payment
Loan Group	Balance	Balance	Date	Rate	Origination	Term	Date
					Origination

Became Foreclosure Property this Period:
6080968 1	104,000.00	103,999.90	01-Jun-2007	7.250%	MI - 80.00%	360	01-Jan-2007
6092367 1	152,240.00	152,240.00	01-Jun-2007	6.750%	GA - 80.00%	360	01-Feb-2007
6099953 1	450,000.00	449,905.68	01-Jun-2007	7.250%	CA - 100.00%	360	01-Mar-2007
6127433 1	357,300.00	357,300.00	01-Jun-2007	8.875%	AZ - 80.00%	360	01-Apr-2007
6130264 1	323,000.00	321,864.48	01-Jun-2007	8.750%	FL - 95.00%	360	01-Jun-2007
6130433 1	441,000.00	441,000.00	01-Jun-2007	8.625%	FL - 90.00%	360	01-Jun-2007
6133613 1	619,200.00	619,200.00	01-Jun-2007	8.375%	MA - 80.00%	360	01-Mar-2007
124028073 1	119,120.00	119,120.00	01-Jun-2007	9.250%	FL - 80.00%	360	01-Jul-2006
124260009 1	280,000.00	279,999.99	01-Jun-2007	8.500%	VA - 80.00%	360	01-Sep-2006
125393529 1	292,000.00	292,000.00	01-Jun-2007	7.500%	MD - 80.00%	360	01-Feb-2007
125708456 1	640,000.00	639,993.00	01-Jun-2007	8.500%	CA - 80.00%	360	01-Feb-2007
126135841 1	110,000.00	110,000.00	01-Jun-2007	6.125%	CA - 26.83%	360	01-Apr-2007


TOTAL	3,887,860.00	3,886,623.05
TOTAL


Page 14 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

Prepayment Report

VOLUNTARY PREPAYMENTS

Total

Current

Number of Paid in Full Loans

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

Curtailments Amount

208,760.00

Paid in Full Balance

4,270,611.46

Repurchased Loans Balance

250,371.72

Total Prepayment Amount

4,729,743.18

Cumulative

Number of Paid in Full Loans

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

Paid in Full Balance

13,567,681.60

Repurchased Loans Balance

581,971.72

Curtailments Amount

375,943.67

Total Prepayment Amount

14,525,596.99

Page 15 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES - Including Liquidated Balances



		Total





SMM	1.54%
3 Months Avg SMM	1.14%
12 Months Avg SMM	1.16%
Avg SMM Since Cut-off	1.16%



CPR	16.96%
3 Months Avg CPR	12.88%
12 Months Avg CPR	13.10%
Avg CPR Since Cut-off	13.10%



PSA	1,022.20%
3 Months Avg PSA Approximation	883.03%
12 Months Avg PSA Approximation	965.27%
Avg PSA Since Cut-off Approximation	965.27%


(*) SMM, CPR, PSA Figures Include Liquidated Balances

Page 16 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY - Including Liquidated Balances

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

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(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/(0.20%*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 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

VOLUNTARY PREPAYMENTS RATES - Excluding Liquidated Balances

Total

SMM

1.54%

3 Months Avg SMM

1.14%

12 Months Avg SMM

1.16%

Avg SMM Since Cut-off

1.16%

CPR

16.96%

3 Months Avg CPR

12.88%

12 Months Avg CPR

13.10%

Avg CPR Since Cut-off

13.10%

PSA

1,022.20%

3 Months Avg PSA Approximation

883.03%

12 Months Avg PSA Approximation

965.27%

Avg PSA Since Cut-off Approximation

965.27%

(*) SMM, CPR, PSA Figures Exclude Liquidated Balances

Page 18 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY - Excluding Liquidated Balances

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/(0.20%*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(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/(0.20%*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 19 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 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

6083947 1

176,000.00

11-Oct-2007

6.500%

SC - 54.15%

Paid Off - 360

01-Dec-2006

6097898 1

164,000.00

29-Oct-2007

7.500%

CT - 80.00%

Paid Off - 360

01-Mar-2007

6099914 1

374,000.00

371,557.20

01-Nov-2007

7.625%

CA - 83.11%

Paid Off - 360

01-Feb-2007

6129260 1

552,000.00

550,215.68

18-Oct-2007

8.250%

CA - 65.72%

Paid Off - 360

01-Jun-2007

6130282 1

159,125.00

158,368.88

29-Oct-2007

7.250%

WI - 95.00%

Paid Off - 360

01-May-2007

6130305 1

921,600.00

918,768.61

25-Oct-2007

8.500%

AZ - 80.00%

Paid Off - 360

01-Jun-2007

6130366 1

213,750.00

213,702.09

17-Oct-2007

7.625%

WI - 95.00%

Paid Off - 360

01-May-2007

6134468 1

718,000.00

25-Oct-2007

8.375%

IL - 75.58%

Paid Off - 360

01-Apr-2007

125723902 1

999,999.00

01-Nov-2007

7.250%

CA - 76.92%

Paid Off - 360

01-Dec-2006

6122913 1

252,000.00

250,371.72

31-Oct-2007

7.750%

CA - 80.00%

Repur/Subs - 360

01-Apr-2007

TOTAL

4,530,474.00

4,520,983.18

Page 20 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES

Total

Current

Subsequent Recoveries

0.00

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

Cumulative Subsequent Recoveries

0.00

Special Hazard Loss Coverage Amt

4,967,998.60

Fraud Loss Coverage Amt

9,531,580.00

Bankruptcy Loss Coverage Amt

150,000.00

Page 21 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution


DEFAULT SPEEDS
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%


Principal Only Loss Severity Approx 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%


Principal & Interest Loss Severity Approx 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 22 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 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)

Principal Only Loss Severity Approximation for current period:

Sum(Principal Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Principal & Interest Loss Severity Approximation for current period:

Sum(Principal & Interest Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Average Loss Severity Approximation over period between nth month and mth month:

Sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans for months in the period n,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.

All Realized Losses in excess of Principal Balance are treated as Interest Realized Losses.

Page 23 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 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)

TOTAL

Page 24 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

Triggers and Adj. Cert. Report

TRIGGER EVENTS

Total

Has Optional Termination Date Reached ?

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 ?

Does an Event of Default Exist?

Senior Stepdown Date has occurred?

Sr.Stepdown Cond Satisfied?(1=Yes or 2=Yes)

1.Delinquency Trigger

Does Delinquency Trigger Event Exist (a > 50% of b)

(a) Rolling Six Month 60+ Delq Balance

7,268,004.09

(b) Aggregate Balance of Subordinate Certificates

30,934,768.98

2.Cumulative Loss Trigger

Does a Loss Trigger Event Exist (a > b)

(a) Cumulative Realized Loss

0.00

(b) Cumulative Loss Threshold (i)*(ii)

30,978,235.76

(i) Threshold Percentage

100.0000%

(ii) Cutoff Date Subordinate Principal Balance

30,978,235.76

ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK

Page 25 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2

Mortgage Pass-Through Certificates

November 26, 2007 Distribution

ADDITIONAL INFORMATION

Total

Senior Percentage

89.950060%

Subordinate Percentage

10.049940%

Senior Prepayment Percentage

100.000000%

Subordinate Prepayment Percentage

0.000000%

Current LIBOR Rate

4.872500%

Libor Rate Determination Date

10/23/2007

Next LIBOR Rate

4.788750%

Next Libor Determination Date

11/21/2007

Beginning Notional Amount of Class A-X

276,875,726.04

Ending Notional Amount of Class A-X

272,138,536.13

Page 26 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution

Additional Certificate Report

ADDITIONAL CERTIFICATE REPORT

		NET WAC Shortfall Prior (1)	Int on Prior SF (2)	Curr NET WAC SF (3)	Total NET WAC SF (1+2+3)	NET WAC Shortfall Paid	NET WAC Shortfall UnPaid


CLASS
	A-1	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	A-2	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	A-3	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	A-4	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00




Page 27 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
November 26, 2007 Distribution

Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
							Total
Current Scheduled Payments							1,872,475.53
Current Scheduled Payments 1 Month Prior							1,892,561.39
Current Scheduled Payments 2 Month Prior							1,913,288.83
Current Scheduled Payments 3 Month Prior							1,939,231.08
Current Scheduled Payments 4 Month Prior							0.00
Current Scheduled Payments 5 Month Prior							0.00
Current Scheduled Payments 6 Month Prior							0.00
Current Scheduled Payments 7 Month Prior							0.00
Current Scheduled Payments 8 Month Prior							0.00
Current Scheduled Payments 9 Month Prior							0.00
Current Scheduled Payments 10 Month Prior							0.00
Current Scheduled Payments 11 Month Prior							0.00


Sched. Payments for 60+Day Delinquent Loans							144,662.45
Sched. Pmts - 60+Day Delinquent Loans, 1 Month Prior							97,418.64
Sched. Pmts - 60+Day Delinquent Loans, 2 Month Prior							45,653.83
Sched. Pmts - 60+Day Delinquent Loans, 3 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 4 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 5 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 6 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 7 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 8 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 9 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 10 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 11 Month Prior							0.00



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 28 of 28

IndyMac IMSC Mortgage Loan Trust 2007-AR2 10-D