FWP 1 file1.htm


** MSC 2007-TOP25 PRICING BENCHMARKS **


TSY:       PX         YLD         SWAPS:
 2YR     99-22+      4.91069        2YR   35.25       11YR   50.25
 3YR     99-14+      4.83283        3YR   36.75       12YR   51.50
 5YR     99-10 3/4   4.77686        4YR   37.75       13YR   53.25
10YR     98-26       4.77719        5YR   41.00       14YR   54.25
30YR     94-9        4.86963        6YR   42.25       15YR   54.75
                                    7YR   43.75
                                    8YR   45.25
                                    9YR   47.00
                                   10YR   48.75



STATEMENT REGARDING FREE WRITING PROSPECTUS

The depositor has filed a registration statement (including a
prospectus) with the SEC for the offering to which this free writing prospectus
relates. Before you invest, you should read the prospectus in the registration
statement and other documents the depositor has filed with the SEC for more
complete information about the depositor, the issuer and this offering. You may
get these documents for free by visiting EDGAR on the SEC Web site at
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This free writing prospectus does not contain all information that is required
to be included in the base prospectus and the prospectus supplement.

The Information in this free writing prospectus is preliminary and is subject to
completion or change.

The Information in this free writing prospectus supersedes information contained
in any prior similar free writing prospectus relating to these securities prior
to the time of your commitment to purchase.

This free writing prospectus is not an offer to sell or solicitation of an offer
to buy these securities in any state where such offer, solicitation or sale is
not permitted.


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