PAINEWEBBER SECURITIES TRUST
                               51 West 52nd Street
                          New York, New York 10019-6114


VIA EDGAR
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

         Re:      PaineWebber Securities Trust
                  (File Nos. 33-55374 and 811-7374)
                  Accession #:  0000928385-01-502242
                  CIK #:  0000894632

Ladies and Gentlemen:

          The purpose of this  letter is to request  that the  amendment  to the
registration  statement on Form N-1A for PaineWebber  Securities Trust, filed on
November 2, 2001  (Accession  #:  0000928385-01-502242),  be withdrawn  from the
SEC's database.

          We  inadvertently  filed  an  amendment  for  a  different  registrant
(Brinson   Securities  Trust)  using  the  filing  submission   information  for
PaineWebber  Securities Trust.  Brinson  Securities Trust has subsequently filed
the  correct  amendment  for  Brinson  Securities  Trust  on  November  6,  2001
(Accession  #:  0000928385-01-502280).  We  respectfully  request  that  the SEC
withdraw  the  amendment  filed on November 2, 2001 for  PaineWebber  Securities
Trust  (Accession  #:  0000928385-01-502242)  pursuant to Rule 477(a)  under the
Securities  Act of  1933.  No  securities  were  sold in  connection  with  this
amendment.

          We appreciate your prompt  attention to this matter and would be happy
to provide additional information you might require.

                                   Sincerely,


                                   /s/ Amy R. Doberman

                                   Amy R. Doberman
                                   Vice President and Secretary
                                   PaineWebber Securities Trust