VAN KAMPEN FOCUS PORTFOLIOS SERIES 269, 487, EX-99.4.1, 2001-01-19

VAN KAMPEN FOCUS PORTFOLIOS SERIES 269
487, EX-99.4.1, 2001-01-19

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                                                                     EXHIBIT 4.1


                                INTERACTIVE DATA
                           FINANCIAL TIMES Information
                               100 William Street
                                   15th Floor
                               New York, NY 10038

                            USA Tel: (212) 269-6300
                              Fax: (212) 771-6445


January 18, 2001


Van Kampen Funds Inc.
One Parkview Plaza
Oakbrook Terrace, IL 60181


         Re:      Van Kampen Focus Portfolios
                  Internet Portfolio, Series 26A
                  Internet Portfolio, Series 26B
                  Morgan Stanley High-Technology 35 Indexsm Portfolio, Series
                  18A Morgan Stanley High-Technology 35 Indexsm Portfolio,
                  Series 18B (A Unit Investment Trust) Registered Under the
                  Securities Act of 1933, File No. 333-51624


  Gentlemen:

         We have examined the Registration Statement for the above captioned
Fund, a copy of which is attached hereto.

         We hereby consent to the reference in the Prospectus and Registration
Statement for the above captioned Fund to Interactive Data Corporation, as the
Evaluator, and to the use of the Obligations prepared by us which are referred
to in such Prospectus and Statement.

         You are authorized to file copies of this letter with the Securities
and Exchange Commission.

                                                               Very truly yours,


                                                                     Steve Miano
                                           Director Fixed Income Data Operations