EXHIBIT 4.2
Standard & Poor's
A Division of The McGraw-Hill Corporation
25 Broadway
New York, New York 10004-1064
Van Kampen Funds Inc.
One Parkview Plaza
Oakbrook Terrace, IL 60181
Re: Van Kampen Focus Portfolios, Municipal Series 337 consisting of:
Pennsylvania Insured Municipals Income Trust, Series 249 and
Michigan Insured Municipals Income Trust, Series 161
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Pursuant to your request for a Standard & Poor's rating on the units of
the above-captioned trust, SEC #333-41818 we have reviewed the information
presented to us and have assigned a `AAA' rating to the units of the trust and a
`AAA' rating to the securities contained in the trust for as long as they remain
in the trust. The ratings are direct reflections, of the portfolio of the trust,
which will be composed solely of securities covered by bond insurance policies
that insure against default in the payment of principal and interest on the
securities so long as they remain in the trust. Since such policies have been
issued by one or more insurance companies which have been assigned a `AAA'
claims paying ability rating by S&P, S&P has assigned a `AAA' rating to the
units of the trust and to the securities contained in the trust for as long as
they remain in the trust.
Standard & Poor's will maintain surveillance on the "AAA" Rating until
August 27, 2001. On this date, the rating will be automatically withdrawn by
Standard & Poor's unless a post effective letter is requested by the Trust.
You have permission to use the name of Standard & Poor's Corporation
and the above-assigned ratings in connection with your dissemination of
information relating to these units, provided that it is understood that the
ratings are not "market" ratings nor recommendations to buy, hold, or sell the
units of the trust or the securities contained in the trust. Further, it should
be understood the rating on the units does not take into account the extent to
which fund expenses or portfolio asset sales for less than the fund's purchase
price will reduce payment to the unit holders of the interest and principal
required to be paid on the portfolio assets. S&P reserves the right to advise
its own clients, subscribers, and the public of the ratings. S&P relies on the
sponsor and its counsel, accountants, and other experts for the accuracy and
completeness of the information submitted in connection with the ratings. S&P
does not independently verify the truth or accuracy of any such information.
This letter evidences our consent to the use of the name of Standard &
Poor's Corporation in connection with the rating assigned to the units in the
registration statement or prospectus relating to the units or the trust.
However, this letter should not be construed as a consent by us, within the
meaning of Section 7 of the Securities Act of 1933, to the use of the name of
Standard & Poor's Corporation in connection with the ratings assigned to the
securities contained in the trust. You are hereby authorized to file a copy of
this letter with the Securities and Exchange Commission.
Please be certain to send us three copies of your final prospectus as
soon as it becomes available. Should we not receive them within a reasonable
time after the closing or should they not conform to the representations made to
us, we reserve the right to withdraw the rating.
We are pleased to have had the opportunity to be of service to you. If
we can be of further help, please do not hesitate to call upon us.
Sincerely,
Sanford Bragg
