SUPPLEMENT
                                      TO
                       SERIES SUPPLEMENT, SERIES 2001-15
                       ----------------------------------


                  THIS SUPPLEMENT, dated as of May 29, 2001 (this
"Supplement"), to the Series Supplement, dated as of April 30, 2001, (the
"Series Supplement") between Lehman ABS Corporation, as depositor (the
"Depositor") and U.S. Bank Trust National Association, as the trustee (the
"Trustee" and together with the Depositor, the "Parties").


                             W I T N E S S E T H:
                             - - - - - - - - - -

                  WHEREAS, the Parties entered into the Series Supplement for
the purpose of setting forth, among other things, certain supplemental
information with respect to the issuance of certificates initially designated
Corporate Backed Trust Certificates, Series 2001-15.


                  NOW, THEREFORE, in consideration of the premises and the
mutual covenants herein contained, the Parties hereby agree as follows:


                  1. Pursuant to Section 3(d) of the Series Supplement, the
Depositor hereby sells to the Trust an additional $2,500,000 of Underlying
Securities and the Trust hereby issues an additional 100,000 Class A-1
Certificates with an initial aggregate Certificate Principal Amount of
$2,500,000 and an additional amount of Class A-2 Certificates with an initial
notional balance of $2,500,000 (the "Additional Certificates"). The Additional
Certificates shall have an original issue date of even date herewith but the
Additional Certificates shall accrue interest from April 30, 2001. The Trust
is also issuing call warrants with respect to the Additional Certificates (the
"Additional Call Warrants"). The descriptions of the Underlying Securities,
the Certificates and the Call Warrants in the Series Supplement, including the
Schedules and Exhibits thereto, shall be deemed to be amended mutatis mutandis
and the Call Schedule attached to the Series Supplement is replaced by
Schedule I attached hereto.

                  2. Effect of Supplement. Except as supplemented hereby, the
Series Supplement is ratified and confirmed and continues in full force and
effect.

                  3. Counterparts. This Supplement may be executed in any
number of counterparts, each of which shall be deemed to be an original, and
all such counterparts shall constitute but one and the same instrument.

                  4. Governing Law. THIS SUPPLEMENT AND THE TRANSACTIONS
DESCRIBED HEREIN SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE
LAWS OF THE STATE OF NEW YORK APPLICABLE TO CONTRACTS MADE AND PERFORMED
WITHIN THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO THE CHOICE OF LAWS
PROVISIONS THEREOF.



<PAGE>


                  IN WITNESS WHEREOF, the parties hereto have caused this
Supplement to be duly executed by their respective officers hereunto duly
authorized, as of the day and year first above written.


                                        LEHMAN ABS CORPORATION

                                        By:  /s/ Rene Canezin
                                           -----------------------------------
                                           Name:   Rene Canezin
                                           Title:  Senior Vice President


                                        U.S. BANK TRUST NATIONAL ASSOCIATION,
                                             not in its individual capacity
                                             but solely as Trustee on behalf
                                             of the Corporate Backed Trust
                                             Certificates Series, 2001-15
                                             Trust



                                        By:  /s/ Marlene Fahey
                                           -----------------------------------
                                           Name:   Marlene Fahey
                                           Title:  Vice President


<PAGE>


CBTC Series 2001-15 (JPM) - With Upsize
Class A-2
I.O. Tranche Call Schedule


     Date           Call Price

  7/15/2001         $ 2,462,893
  1/15/2002         $ 2,451,739
  7/15/2002         $ 2,440,028
  1/15/2003         $ 2,427,731
  7/15/2003         $ 2,414,819
  1/15/2004         $ 2,401,262
  7/15/2004         $ 2,387,027
  1/15/2005         $ 2,372,080
  7/15/2005         $ 2,356,386
  1/15/2006         $ 2,339,907
  7/15/2006         $ 2,322,604
  1/15/2007         $ 2,304,436
  7/15/2007         $ 2,285,359
  1/15/2008         $ 2,265,329
  7/15/2008         $ 2,244,297
  1/15/2009         $ 2,222,214
  7/15/2009         $ 2,199,026
  1/15/2010         $ 2,174,679
  7/15/2010         $ 2,149,115
  1/15/2011         $ 2,122,272
  7/15/2011         $ 2,094,087
  1/15/2012         $ 2,064,494
  7/15/2012         $ 2,033,420
  1/15/2013         $ 2,000,793
  7/15/2013         $ 1,966,534
  1/15/2014         $ 1,930,562
  7/15/2014         $ 1,892,792
  1/15/2015         $ 1,853,134
  7/15/2015         $ 1,811,492
  1/15/2016         $ 1,767,768
  7/15/2016         $ 1,721,859
  1/15/2017         $ 1,673,653
  7/15/2017         $ 1,623,038
  1/15/2018         $ 1,569,891
  7/15/2018         $ 1,514,087
  1/15/2019         $ 1,455,494
  7/15/2019         $ 1,393,970
  1/15/2020         $ 1,329,370
  7/15/2020         $ 1,261,540
  1/15/2021         $ 1,190,319
  7/15/2021         $ 1,115,537
  1/15/2022         $ 1,037,015
  7/15/2022         $   954,568
  1/15/2023         $   867,998
  7/15/2023         $   777,100
  1/15/2024         $   681,656
  7/15/2024         $   581,441
  1/15/2025         $   476,215
  7/15/2025         $   365,727
  1/15/2026         $   249,715
  7/15/2026         $   127,903
  1/15/2027             --