BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

External Parties

Table of Contents

Page

Servicer(s)

1. Certificate Payment Report

Wells Fargo Bank, National Association

2. Collection Account Report

3. Credit Enhancement Report

Underwriter(s)

4. Collateral Report

Barclays Capital Inc.

5. Delinquency Report

6. REO Report

Swap Counterparty

7. Foreclosure Report

Barclays Bank PLC.

8. Prepayment Report

9. Prepayment Detail Report

10. Realized Loss Report

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

Amy Stoddard

Close Date:

July 19, 2007

Administrator

First Distribution Date:

July 25, 2007

(714) 247-6255

Amy.Stoddard@db.com

Address:

Distribution Date:

October 25, 2007

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

Record Date:

September 28, 2007

Factor Information:

(800) 735-7777

October 24, 2007

Main Phone Number:

(714) 247-6000

Determination Date:

October 17, 2007

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

Page 1 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution

Certificate Payment Report
Current Period Distribution -
			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	SEN	311,948,000.00	299,324,983.66	1,317,341.72	2,008,003.16	3,325,344.88	0.00	0.00	297,316,980.50
A-1	SEN	311,948,000.00	299,324,983.66	1,317,341.72	2,008,003.16	3,325,344.88	0.00	0.00	297,316,980.50
A-2	SEN	54,037,000.00	54,037,000.00	273,337.16	0.00	273,337.16	0.00	0.00	54,037,000.00
A-3	SEN	40,989,000.00	40,989,000.00	216,216.98	0.00	216,216.98	0.00	0.00	40,989,000.00
A-4	SEN	17,572,000.00	17,572,000.00	96,353.13	0.00	96,353.13	0.00	0.00	17,572,000.00
A-5	SEN	47,172,000.00	47,172,000.00	246,080.60	0.00	246,080.60	0.00	0.00	47,172,000.00
M-1	MEZ	20,608,000.00	20,608,000.00	97,566.00	0.00	97,566.00	0.00	0.00	20,608,000.00
M-2	MEZ	16,091,000.00	16,091,000.00	77,521.74	0.00	77,521.74	0.00	0.00	16,091,000.00
M-3	MEZ	7,058,000.00	7,058,000.00	35,179.72	0.00	35,179.72	0.00	0.00	7,058,000.00
M-4	MEZ	5,928,000.00	5,928,000.00	31,523.38	0.00	31,523.38	0.00	0.00	5,928,000.00
M-5	MEZ	5,928,000.00	5,928,000.00	32,758.38	0.00	32,758.38	0.00	0.00	5,928,000.00
M-6	MEZ	5,081,000.00	5,081,000.00	28,077.82	0.00	28,077.82	0.00	0.00	5,081,000.00
M-7	MEZ	5,082,000.00	5,082,000.00	28,083.34	0.00	28,083.34	0.00	0.00	5,082,000.00
M-8	MEZ	3,387,000.00	3,387,000.00	18,716.70	0.00	18,716.70	0.00	0.00	3,387,000.00
M-9	MEZ	5,645,000.00	5,645,000.00	31,194.51	0.00	31,194.51	0.00	0.00	5,645,000.00
CE	MEZ	18,360,203.31	18,076,358.51	749,136.84	0.00	749,136.84	0.00	0.00	18,076,358.51
R	RES	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total		564,886,203.31	551,979,342.17	3,279,088.02	2,008,003.16	5,287,091.18	0.00	0.00	549,971,339.01
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	09/25/07	10/24/07	A-Act/360	05529DAA0	311,948,000.00	959.534870	4.222953	6.436980	10.659933	953.097890
A-1	09/25/07	10/24/07	A-Act/360	05529DAA0	311,948,000.00	959.534870	4.222953	6.436980	10.659933	953.097890
A-2	09/25/07	10/24/07	F-30/360	05529DAB8	54,037,000.00	1,000.000000	5.058333	0.000000	5.058333	1,000.000000
A-3	09/25/07	10/24/07	F-30/360	05529DAC6	40,989,000.00	1,000.000000	5.275000	0.000000	5.275000	1,000.000000
A-4	09/25/07	10/24/07	F-30/360	05529DAD4	17,572,000.00	1,000.000000	5.483333	0.000000	5.483333	1,000.000000
A-5	09/25/07	10/24/07	F-30/360	05529DAE2	47,172,000.00	1,000.000000	5.216667	0.000000	5.216667	1,000.000000
M-1	09/25/07	10/24/07	A-Act/360	05529DAF9	20,608,000.00	1,000.000000	4.734375	0.000000	4.734375	1,000.000000
M-2	09/25/07	10/24/07	A-Act/360	05529DAG7	16,091,000.00	1,000.000000	4.817708	0.000000	4.817708	1,000.000000
M-3	09/25/07	10/24/07	A-Act/360	05529DAH5	7,058,000.00	1,000.000000	4.984375	0.000000	4.984375	1,000.000000
M-4	09/25/07	10/24/07	A-Act/360	05529DAJ1	5,928,000.00	1,000.000000	5.317709	0.000000	5.317709	1,000.000000
M-5	09/25/07	10/24/07	A-Act/360	05529DAK8	5,928,000.00	1,000.000000	5.526043	0.000000	5.526043	1,000.000000
M-6	09/25/07	10/24/07	A-Act/360	05529DAL6	5,081,000.00	1,000.000000	5.526042	0.000000	5.526042	1,000.000000
M-7	09/25/07	10/24/07	A-Act/360	05529DAM4	5,082,000.00	1,000.000000	5.526041	0.000000	5.526041	1,000.000000
M-8	09/25/07	10/24/07	A-Act/360	05529DAN2	3,387,000.00	1,000.000000	5.526041	0.000000	5.526041	1,000.000000
M-9	09/25/07	10/24/07	A-Act/360	05529DAP7	5,645,000.00	1,000.000000	5.526043	0.000000	5.526043	1,000.000000
CE		05529DAQ5	18,360,203.31	984.540215	40.802208	0.000000	40.802208	984.540215
R		05529DAR3	0.00	0.000000	0.000000	0.000000	0.000000	0.000000




Page 2 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution


Distribution to Date -
									Current


	Original		Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal

Class	Face Value	Interest	Principal	Principal	Principal	Distribution	Loss	Interest	Balance
(1)	(2)	(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
A-1	311,948,000.00	4,523,148.82	1,683,258.65	324,744.51	14,631,019.50	19,154,168.32	0.00	0.00	297,316,980.50
A-2	54,037,000.00	874,678.91	0.00	0.00	0.00	874,678.91	0.00	0.00	54,037,000.00
A-3	40,989,000.00	691,894.34	0.00	0.00	0.00	691,894.34	0.00	0.00	40,989,000.00
A-4	17,572,000.00	308,330.02	0.00	0.00	0.00	308,330.02	0.00	0.00	17,572,000.00
A-5	47,172,000.00	787,457.92	0.00	0.00	0.00	787,457.92	0.00	0.00	47,172,000.00
M-1	20,608,000.00	329,134.08	0.00	0.00	0.00	329,134.08	0.00	0.00	20,608,000.00
M-2	16,091,000.00	261,372.60	0.00	0.00	0.00	261,372.60	0.00	0.00	16,091,000.00
M-3	7,058,000.00	118,488.63	0.00	0.00	0.00	118,488.63	0.00	0.00	7,058,000.00
M-4	5,928,000.00	105,973.30	0.00	0.00	0.00	105,973.30	0.00	0.00	5,928,000.00
M-5	5,928,000.00	110,007.63	0.00	0.00	0.00	110,007.63	0.00	0.00	5,928,000.00
M-6	5,081,000.00	94,289.60	0.00	0.00	0.00	94,289.60	0.00	0.00	5,081,000.00
M-7	5,082,000.00	94,308.15	0.00	0.00	0.00	94,308.15	0.00	0.00	5,082,000.00
M-8	3,387,000.00	62,853.54	0.00	0.00	0.00	62,853.54	0.00	0.00	3,387,000.00
M-9	5,645,000.00	104,755.91	0.00	0.00	0.00	104,755.91	0.00	0.00	5,645,000.00
CE	18,360,203.31	5,182,302.73	0.00	0.00	283,844.80	5,466,147.53	0.00	0.00	18,076,358.51
R	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total	564,886,203.31	13,648,996.18	1,683,258.65	324,744.51	14,914,864.30	28,563,860.48	0.00	0.00	549,971,339.01


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

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

Class	Rate	Balance	Interest	Interest SF	Interest	Adjustment	Interest	Interest	Interest
			(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
A-1	5.28125%	299,324,983.66	1,317,341.72	0.00	0.00	0.00	1,317,341.72	1,317,341.72	0.00
A-2	6.07000%	54,037,000.00	273,337.16	0.00	0.00	0.00	273,337.16	273,337.16	0.00
A-3	6.33000%	40,989,000.00	216,216.98	0.00	0.00	0.00	216,216.98	216,216.98	0.00
A-4	6.58000%	17,572,000.00	96,353.13	0.00	0.00	0.00	96,353.13	96,353.13	0.00
A-5	6.26000%	47,172,000.00	246,080.60	0.00	0.00	0.00	246,080.60	246,080.60	0.00
M-1	5.68125%	20,608,000.00	97,566.00	0.00	0.00	0.00	97,566.00	97,566.00	0.00
M-2	5.78125%	16,091,000.00	77,521.74	0.00	0.00	0.00	77,521.74	77,521.74	0.00
M-3	5.98125%	7,058,000.00	35,179.72	0.00	0.00	0.00	35,179.72	35,179.72	0.00
M-4	6.38125%	5,928,000.00	31,523.38	0.00	0.00	0.00	31,523.38	31,523.38	0.00
M-5	6.63125%	5,928,000.00	32,758.38	0.00	0.00	0.00	32,758.38	32,758.38	0.00
M-6	6.63125%	5,081,000.00	28,077.82	0.00	0.00	0.00	28,077.82	28,077.82	0.00
M-7	6.63125%	5,082,000.00	28,083.34	0.00	0.00	0.00	28,083.34	28,083.34	0.00
M-8	6.63125%	3,387,000.00	18,716.70	0.00	0.00	0.00	18,716.70	18,716.70	0.00
M-9	6.63125%	5,645,000.00	31,194.51	0.00	0.00	0.00	31,194.51	31,194.51	0.00
CE	49.73149%	18,076,358.51	0.00	0.00	0.00	0.00	0.00	749,136.84	0.00
R	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total		551,979,342.17	2,529,951.18	0.00	0.00	0.00	2,529,951.18	3,279,088.02	0.00



Page 3 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

Collection Account Report

SUMMARY

Total

Principal Collections

2,008,003.16

Principal Withdrawals

0.00

Principal Other Accounts

0.00

TOTAL NET PRINCIPAL

2,008,003.16

Interest Collections

3,399,455.21

Interest Withdrawals

-0.00

Interest Fees

-16,752.24

Interest Other Accounts

(103,614.95)

TOTAL NET INTEREST

3,279,088.03

TOTAL AVAILABLE FUNDS FOR DISTRIBUTION

5,287,091.19

PRINCIPAL - COLLECTIONS

Total

Scheduled Principal Received

324,744.51

Curtailments

83,109.89

Prepayments In Full

1,600,148.76

Repurchased/Substitutions

0.00

Liquidations

0.00

Insurance Principal

0.00

Other Additional Principal

0.00

Delinquent Principal

-289,612.01

Realized Losses

-0.00

Advanced Principal

289,612.01

TOTAL PRINCIPAL COLLECTED

2,008,003.16

PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK

PRINCIPAL - OTHER ACCOUNTS

Total

TOTAL PRINCIPAL OTHER ACCOUNTS

0.00

Page 4 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

INTEREST - COLLECTIONS

Total

Scheduled Interest

3,555,196.52

Repurchased/Substitution Interest

0.00

Liquidation Interest

0.00

Insurance Interest

0.00

Other Additional Interest

0.00

Prepayment Interest Shortfalls

-5,397.55

Delinquent Interest

-3,213,909.92

Compensating Interest

5,397.55

Civil Relief Act Shortfalls

-0.00

Interest Realized Loss

-0.00

Interest Advanced

3,058,168.61

TOTAL INTEREST COLLECTED

3,399,455.21

INTEREST - WITHDRAWALS

Total

Non Recoverable Advances

0.00

Extraordinary Trust Fund Expenses

0.00

TOTAL INTEREST WITHDRAWALS

0.00

INTEREST - OTHER ACCOUNTS

Total

Prepayment Charges

8,385.00

Net Swap Receipt

0.00

Net Swap Payment

111,999.95

. a) Swap Payment

(1,629,358.99)

. b) Swap Receipt

1,517,359.04

. c) Swap Termination Payment

0.00

. d) Defaulted Swap Termination Payment

0.00

TOTAL INTEREST OTHER ACCOUNTS

(103,614.95)

INTEREST FEES

Total

Current Servicing Fees

16,752.24

TOTAL INTEREST FEES

16,752.24

Page 5 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

Credit Enhancement Report

ACCOUNTS

Excess Reserve Fund

Beginning Balance

0.00

Amount Deposited

0.00

Amount Withdrawn

0.00

Ending Balance

0.00

Supplemental Interest Trust

Beginning Balance

0.00

Amount Deposited

1,517,359.04

Amount Withdrawn

1,629,358.99

Net SWAP Amount

111,999.95

Ending Balance

0.00

INSURANCE

SPACE INTENTIONALLY LEFT BLANK

STRUCTURAL FEATURES

Total

Overcollateralized Amount - Prior Period

18,076,358.51

Current Period Principal Realized Losses

0.00

Overcollateralized Amount - After Current Losses

18,076,358.51

Extra Principal Distribution Amount

0.00

Overcollateralization Reduction Amount

0.00

Overcollateralized Amount - Ending

18,076,358.51

Overcollateralization Deficiency Amount

0.00

Overcollateralization Excess Amount

64,744,000.00

Specified Overcollateralization Amount

18,076,358.51

Net Monthly Excess Cashflow

740,751.84

Net Monthly Excess Cashflow Allocated to :

. a) Unpaid Interest Amounts

0.00

. b) Applied Realized Loss Amounts

0.00

. c) Basis Risk Carryforward Amounts

0.00

Page 6 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

Collateral Report

COLLATERAL

Total

Loan Count:

Original

2,494

Prior

2,452

Prefunding

Scheduled Paid Offs

-0

Full Voluntary Prepayments

-10

Repurchases

-0

Liquidations

-0

Current

2,442

Principal Balance:

Original

564,886,203.31

Prior

551,979,342.17

Prefunding

0.00

Scheduled Principal

-324,744.51

Partial Prepayments

-83,109.89

Full Voluntary Prepayments

-1,600,148.76

Repurchases

-0.00

Liquidations

-0.00

Current

549,971,339.01

PREFUNDING

SPACE INTENTIONALLY LEFT BLANK

Page 7 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution


CHARACTERISTICS
CHARACTERISTICS

							Total
Weighted Average Coupon Original							7.73309%
Weighted Average Coupon Prior							7.72936%
Weighted Average Coupon Current							7.72898%
Weighted Average Months to Maturity Original							350
Weighted Average Months to Maturity Prior							347
Weighted Average Months to Maturity Current							346
Weighted Avg Remaining Amortization Term Original							394
Weighted Avg Remaining Amortization Term Prior							392
Weighted Avg Remaining Amortization Term Current							391
Weighted Average Seasoning Original							6.34
Weighted Average Seasoning Prior							8.34
Weighted Average Seasoning Current							9.34

Page 8 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution


ARM CHARACTERISTICS
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
SERVICING FEES & ADVANCES

							Total




Current Servicing Fees							16,752.24
Delinquent Servicing Fees							155,741.30
TOTAL SERVICING FEES							172,493.55


Total Servicing Fees							172,493.55
Compensating Interest							-5,397.55
Delinquent Servicing Fees							-155,741.30
COLLECTED SERVICING FEES							11,354.69


Total Advanced Interest							3,058,168.61
Total Advanced Principal							289,612.01
Aggregate P&I Advances with respect to this Distribution							3,347,780.62





ADDITIONAL COLLATERAL INFORMATION
ADDITIONAL COLLATERAL INFORMATION
							Total
Prepayment Interest Shortfall (PPIS)							5,397.55
Compensating Interest							(5,397.55)
Net Prepayment Interest Shortfall (PPIS)							0.00


Weighted Average Net Mortgage Rate							7.390397%
Subsequent Recoveries							0.00
Pool Factor							0.973597%





Page 9 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution

Delinquency Report


TOTAL	0-30 Days	31-60 Days	61-90 Days	91-120 Days	121-150 Days	151-180 Days	181 +	TOTAL
	0-30 Days	31-60 Days	61-90 Days	91-120 Days	121-150 Days	151-180 Days	181 +	TOTAL
DELINQUENT Balance % Balance # Loans % # Loans
		11,678,780.06	11,776,510.12	650,129.18	1,033,619.83	0.00	0.00	25,139,039.19
		2.12%	2.14%	0.12%	0.19%	0.00%	0.00%	4.57%
		42	42	4	4	0	0	92
		1.72%	1.72%	0.16%	0.16%	0.00%	0.00%	3.77%
FORECLOSURE Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	3,047,756.51	2,884,917.83	2,982,076.93	0.00	8,914,751.27
	0.00%	0.00%	0.00%	0.55%	0.52%	0.54%	0.00%	1.62%
	0	0	0	11	10	9	0	30
	0.00%	0.00%	0.00%	0.45%	0.41%	0.37%	0.00%	1.23%
BANKRUPTCY Balance % Balance # Loans % # Loans
	860,903.21	392,828.47	269,877.96	220,348.71	519,783.89	195,106.34	0.00	2,458,848.58
	0.16%	0.07%	0.05%	0.04%	0.09%	0.04%	0.00%	0.45%
	4	2	1	1	2	1	0	11
	0.16%	0.08%	0.04%	0.04%	0.08%	0.04%	0.00%	0.45%
REO Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	101,519.94	89,441.75	0.00	190,961.69
	0.00%	0.00%	0.00%	0.00%	0.02%	0.02%	0.00%	0.03%
	0	0	0	0	1	1	0	2
	0.00%	0.00%	0.00%	0.00%	0.04%	0.04%	0.00%	0.08%
TOTAL Balance % Balance # Loans % # Loans
	860,903.21	12,071,608.53	12,046,388.08	3,918,234.40	4,539,841.49	3,266,625.02	0.00	36,703,600.73
	0.16%	2.19%	2.19%	0.71%	0.83%	0.59%	0.00%	6.67%
	4	44	43	16	17	11	0	135
	0.16%	1.80%	1.76%	0.66%	0.70%	0.45%	0.00%	5.53%

Page 10 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 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

Became REO Property this Period:

155839681 1

101,700.00

101,519.94

01-Apr-2007

9.750%

MI - 90.00%

360

01-Jan-2007

157578782 1

90,000.00

89,441.75

01-Mar-2007

8.000%

GA - 74.38%

360

01-Feb-2007

TOTAL

191,700.00

190,961.69

Page 11 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 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:
155735442 1	163,800.00	163,207.46	01-May-2007	7.950%	NC - 90.00%	360	01-Nov-2006
156819062 1	481,500.00	478,799.12	01-May-2007	8.500%	NJ - 90.00%	360	01-Feb-2007
156882292 1	275,500.00	273,776.77	01-May-2007	8.500%	PA - 95.00%	360	01-Jan-2007
156951782 1	218,000.00	217,357.69	01-May-2007	7.625%	NJ - 87.90%	360	01-Feb-2007
157079922 1	332,500.00	331,817.34	01-May-2007	9.250%	MA - 95.00%	360	01-Jan-2007
157084492 1	130,150.00	129,483.83	01-May-2007	8.950%	NM - 95.00%	360	01-Feb-2007
157097916 1	500,000.00	498,363.10	01-May-2007	7.250%	ID - 85.47%	360	01-Feb-2007
157137936 1	84,800.00	84,556.70	01-May-2007	8.625%	AL - 89.26%	360	01-Feb-2007
157212309 1	74,700.00	74,224.97	01-May-2007	7.875%	MI - 90.00%	360	01-Feb-2007
157475112 1	429,055.00	428,920.92	01-May-2007	7.500%	CA - 80.00%	360	01-Feb-2007
157620501 1	368,500.00	367,248.61	01-May-2007	7.250%	CA - 88.80%	360	01-Feb-2007


TOTAL	3,058,505.00	3,047,756.51

Became Foreclosure Property in a Prior Period:
70303995 1	234,807.00	234,147.49	01-Apr-2007	8.375%	FL - 89.28%	360	01-Jan-2007
71447916 1	566,000.00	562,310.46	01-Mar-2007	7.750%	AZ - 89.98%	360	01-Feb-2007
147890214 1	143,984.00	141,291.34	01-Apr-2007	7.625%	FL - 89.99%	360	01-Nov-2005
152567921 1	84,456.00	83,654.95	01-Mar-2007	8.875%	PA - 90.00%	360	01-Jul-2006
155865843 1	152,100.00	151,809.98	01-Mar-2007	9.500%	NY - 89.47%	360	01-Jan-2007
156590689 1	585,000.00	583,210.41	01-Mar-2007	7.875%	NY - 90.00%	360	01-Jan-2007
156593584 1	295,400.00	294,770.76	01-Apr-2007	9.125%	AZ - 94.98%	360	01-Jan-2007
156618415 1	450,000.00	449,040.70	01-Apr-2007	8.750%	CA - 93.75%	360	01-Feb-2007
156966905 1	222,000.00	220,588.29	01-Mar-2007	7.875%	NJ - 89.16%	360	01-Feb-2007
157112921 1	188,000.00	187,644.99	01-Mar-2007	8.750%	FL - 80.00%	360	01-Mar-2007
157113051 1	304,000.00	303,327.85	01-Mar-2007	8.625%	FL - 95.00%	360	01-Feb-2007
157119736 1	122,000.00	121,292.80	01-Apr-2007	8.875%	MD - 100.00%	360	01-Jan-2007
157126475 1	472,500.00	471,530.00	01-Mar-2007	9.250%	AZ - 90.00%	360	01-Jan-2007
157170622 1	132,300.00	131,538.86	01-Apr-2007	8.375%	WV - 90.00%	360	01-Feb-2007
157282534 1	270,000.00	268,541.30	01-Apr-2007	8.750%	ME - 90.00%	360	01-Feb-2007
157382482 1	484,500.00	483,217.04	01-Apr-2007	8.000%	CA - 95.00%	360	01-Feb-2007
157426073 1	634,500.00	634,494.81	01-Apr-2007	8.375%	CA - 90.00%	360	01-Feb-2007
157515248 1	418,000.00	418,000.00	01-Mar-2007	8.000%	PA - 95.00%	360	01-Mar-2007
157670878 1	126,825.00	126,582.73	01-Apr-2007	9.125%	MI - 95.00%	360	01-Feb-2007


TOTAL	5,886,372.00	5,866,994.76


TOTAL	8,944,877.00	8,914,751.27
TOTAL


Page 12 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 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

83,109.89

Paid in Full Balance

1,600,148.76

Repurchased Loans Balance

0.00

Total Prepayment Amount

1,683,258.65

Cumulative

Number of Paid in Full Loans

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

Paid in Full Balance

12,914,478.19

Repurchased Loans Balance

0.00

Curtailments Amount

595,263.22

Total Prepayment Amount

13,509,741.41

Page 13 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution


PREPAYMENTS RATES



		Total





SMM	0.31%
3 Months Avg SMM	0.55%
12 Months Avg SMM	0.61%
Avg SMM Since Cut-off	0.61%



CPR	3.60%
3 Months Avg CPR	6.42%
12 Months Avg CPR	7.07%
Avg CPR Since Cut-off	7.07%



PSA	192.85%
3 Months Avg PSA Approximation	385.34%
12 Months Avg PSA Approximation	451.21%
Avg PSA Since Cut-off Approximation	451.21%

Page 14 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidation Balance)/(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 15 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 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

69888071 1

103,050.00

102,614.54

28-Sep-2007

9.875%

FL - 90.00%

Paid Off - 360

01-Jan-2007

69986149 1

103,050.00

102,614.54

28-Sep-2007

9.875%

FL - 90.00%

Paid Off - 360

01-Jan-2007

69986412 1

103,050.00

102,614.54

28-Sep-2007

9.875%

FL - 90.00%

Paid Off - 360

01-Jan-2007

71257232 1

320,000.00

319,193.86

05-Sep-2007

7.750%

WV - 88.89%

Paid Off - 360

01-Feb-2007

155384456 1

100,000.00

98,142.35

14-Sep-2007

7.500%

CA - 19.92%

Paid Off - 240

01-Dec-2006

156427312 1

229,500.00

228,991.42

27-Sep-2007

9.500%

MA - 90.00%

Paid Off - 360

01-Jan-2007

157281841 1

171,000.00

169,846.78

14-Sep-2007

8.250%

FL - 90.00%

Paid Off - 360

01-Feb-2007

157347964 1

110,000.00

109,239.50

04-Sep-2007

7.000%

VA - 66.27%

Paid Off - 360

01-Feb-2007

157368002 1

169,500.00

168,382.47

05-Sep-2007

7.125%

DC - 44.61%

Paid Off - 360

01-Feb-2007

157369448 1

199,500.00

198,508.76

11-Sep-2007

8.500%

WI - 95.00%

Paid Off - 360

01-Feb-2007

TOTAL

1,608,650.00

1,600,148.76

Page 16 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES



		Total


Current





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



Number of Loans Liquidated		1
Subsequent Recoveries		0.00
Collateral Realized Loss/(Gain) Amount		33,964.96
Net Liquidation Proceeds		80,529.67






	Current Applied Realized Loss CE		0.00
	Current Applied Realized Loss M-9		0.00
	Current Applied Realized Loss M-8		0.00
	Current Applied Realized Loss M-7		0.00
	Current Applied Realized Loss M-6		0.00
	Current Applied Realized Loss M-5		0.00
	Current Applied Realized Loss M-4		0.00
	Current Applied Realized Loss M-3		0.00
	Current Applied Realized Loss M-2		0.00
	Current Applied Realized Loss M-1		0.00

Page 17 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution


DEFAULT SPEEDS

								Total




MDR								0.00%
3 Months Avg MDR								0.01%
12 Months Avg MDR								0.01%
Avg MDR Since Cut-off								0.01%


CDR								0.00%
3 Months Avg CDR								0.08%
12 Months Avg CDR								0.06%
Avg CDR Since Cut-off								0.06%


SDA								0.00%
3 Months Avg SDA Approximation								49.03%
12 Months Avg SDA Approximation								39.12%
Avg SDA Since Cut-off Approximation								39.10%


Loss Severity Approximation for Current Period								0.00%
3 Months Avg Loss Severity Approximation								29.67%
12 Months Avg Loss Severity Approximation								29.67%
Avg Loss Severity Approximation Since Cut-off								29.67%

Page 18 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 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)

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.

Charged off or Partially Charged off Loans assumed to have a minimum 100% Loss Severity Percentage.

Page 19 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 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 20 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

Triggers and Adj. Cert. Report

TRIGGER EVENTS

Total

Stepdown Date has occurred

Step Down-Distribution Date July 2010

Trigger Event in effect (if either (i) or (ii) are true)

(i)If (A)>(B)

(1) Delinquency %

2.8877%

(A) 60+ Day Deliquent Mortgage Loan Balance

25,024,820.67

549,971,339.01

Prior Senior Enhancement Percentage

16.8275%

(B) Senior Specified Enhancement %

16.8889%

(ii)If (A)>(B)

(A) Cumulative Loss Percentage (1/2)

0.0060%

(1) Cumulative Realized Loss

33,964.96

(2) Cutoff Pool Balance

564,886,203.31

(B) Applicable Loss Percentage

100.0000%

Servicer Event of Default?

Has Optional Termination Date Reached ?

Does an Event of Default Exist?

ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK

Page 21 of 24

BCAP LLC Trust 2007-AB1

Mortgage Pass-Through Certificates

October 25, 2007 Distribution

ADDITIONAL INFORMATION

Total

Current LIBOR Rate

5.131250%

Current LIBOR Determination Date

09/21/2007

Next LIBOR Rate

4.872500%

Next LIBOR Determination Date

10/23/2007

Current Swap LIBOR Rate

5.131250%

# of Loans affected by Relief Act

0.00

Page 22 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution

Additional Certificate Report

ADDITIONAL CERTIFICATE REPORT

		NET WAC Shortfall Prior (1)	Interest 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
	A-5	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-1	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-2	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-3	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-4	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-5	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-6	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-7	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-8	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
	M-9	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00




Page 23 of 24

BCAP LLC Trust 2007-AB1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
October 25, 2007 Distribution

Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
							Total
Scheduled Payments for all Mortgage Loans							3,879,941.03
Current Scheduled Payments 1 Month Prior							3,900,383.99
Current Scheduled Payments 2 Month Prior							3,930,358.71
Current Scheduled Payments 3 Month Prior							3,961,764.36
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							180,482.58
Sched. Pmts - 60+Day Delinquent Loans, 1 Month Prior							98,420.26
Sched. Pmts - 60+Day Delinquent Loans, 2 Month Prior							65,543.70
Sched. Pmts - 60+Day Delinquent Loans, 3 Month Prior							24,721.39
Sched. Pmts - 60+Day Delinquent Loans, 4 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 5 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 6 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 7 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 8 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 9 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 10 Month Prior							0.00
Sched. Pmts - 60+Day Delinquent Loans, 11 Month Prior							0.00





Page 24 of 24

BCAPB LLC Trust 2007-AB1 10-D