MORGAN STANLEY DEAN WITTER & CO
424B3, 2001-01-19
FINANCE SERVICES
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The information in this pricing supplement is not complete and may be changed.
We may not deliver these securities until a final pricing supplement is
delivered. This pricing supplement and the accompanying prospectus and
prospectus supplement do not constitute an offer to sell these securities and
they are not soliciting an offer to buy these securities in any state where the
offer or sale is not permitted.


       Subject to Completion, Pricing Supplement dated January 11, 2001

PROSPECTUS Dated May 18, 2000                     Pricing Supplement No. 53 to
PROSPECTUS SUPPLEMENT                     Registration Statement No. 333-34392
Dated May 18, 2000                                Dated                 , 2000
                                                                Rule 424(b)(3)

                                  $25,000,000
                       Morgan Stanley Dean Witter & Co.
                          MEDIUM-TERM NOTES, SERIES C
                            Senior Fixed Rate Notes
                                   ---------
                           PERKS due March 30, 2004
        Mandatorily Exchangeable for an Amount Payable in U.S. Dollars
                             based on the value of
                             the NASDAQ-100 INDEX(R)
                  Performance Equity Return linKed Securities(SM)
                                    ("PERKS(SM)")

The PERKS do not guarantee any return of principal at  maturity. Instead, the
PERKS will pay at maturity an amount of cash based on the closing value of the
Nasdaq-100 Index at maturity, subject to a maximum payment of $      per PERKS
and a multiplier that protects your investment from a decline of up to 25% in
the value of the Nasdaq-100 Index.

o    The issue price of each PERKS is $      , which is one one-hundredth of the
     closing value of the Nasdaq-100 Index on January   , 2001, the day we offer
     the PERKS for initial sale to the public.

o    At maturity you will receive an amount of cash for each PERKS equal to one
     one-hundredth of the final closing value of the Nasdaq-100 Index at
     maturity times the multiplier, subject to a maximum payment of $      per
     PERKS. If the closing value of the Nasdaq-100 Index at maturity is equal
     to or greater than the initial index value, the multiplier will be 100%.
     But if the closing value of the Nasdaq-100 Index at maturity is less than
     the initial index value, the multiplier will equal the initial index value
     divided by the final index value, provided that the multiplier will not
     exceed 133.34%.

o    We will pay 0.04% interest (equivalent to $      per year) on the $
     issue price of each PERKS. Interest will be paid semi-annually, beginning
     on September 30, 2001.

o    We will apply to list the PERKS to trade under the proposed symbol "PPN"
     on the American Stock Exchange, Inc., subject to meeting its listing
     requirements.

Investing in PERKS is not equivalent to investing in the Nasdaq-100 Index or
its component stocks. You should read the more detailed description of the
PERKS in this pricing supplement. In particular, you should review and
understand the descriptions in "Summary of Pricing Supplement" and "Description
of PERKS."

The PERKS are riskier than ordinary debt securities. See "Risk Factors"
beginning on PS-6.

                          ----------------------------
                           PRICE $         PER PERKS
                          ----------------------------

                                            Agent's         Proceeds to
                   Price to Public(1)     Commissions       the Company(1)
                   ------------------     -----------       --------------
Per PERKS.........        $                    $                 $
Total.............        $                    $                 $

---------
(1)   Plus accrued interest, if any, from the Original Issue Date.


If you purchase at least 100,000 PERKS in any single transaction and you
comply with the holding period requirement described under "Supplemental
Information Concerning Plan of Distribution" in this pricing supplement, the
price will be $      per PERKS (98% of the issue price). In that case, the
underwriting discounts and commissions will be $      per PERKS.

                          MORGAN STANLEY DEAN WITTER
ADVEST, INC.                                             ROBERT W. BAIRD & CO.
A.G. EDWARDS & SONS, INC.                          JANNEY MONTGOMERY SCOTT LLC
LEGG MASON WOOD WALKER                               MCDONALD INVESTMENTS INC.
     INCORPORATED

<PAGE>







                     (This page intentionally left blank)








                                     PS-2
<PAGE>


                         SUMMARY OF PRICING SUPPLEMENT

     The following summary describes the PERKS we are offering to you in
general terms only. You should read the summary together with the more detailed
information that is contained in the rest of this pricing supplement and in the
accompanying prospectus and prospectus supplement. You should carefully
consider, among other things, the matters set forth in "Risk Factors."

     The PERKS offered are medium-term debt securities of Morgan Stanley Dean
Witter & Co. The return on the PERKS is linked to the performance of the
Nasdaq-100 Index. Unlike ordinary debt securities, the PERKS do not guarantee
any return of their principal amount at maturity. Instead, at maturity, the
PERKS pay an amount in cash based on the closing value of the Nasdaq-100 Index,
subject to a maximum payment of $       per PERKS and a multiplier that protects
your investment from a decline of up to 25% in the value of the Nasdaq-100
Index. We may not redeem the PERKS prior to maturity.

     "Performance Equity Return linKed Securities" and "PERKS" are our service
marks.

<TABLE>
<S>                           <C>
Each PERKS                    We, Morgan Stanley Dean Witter & Co., are offering Performance Equity Return linKed
costs $                       Securities(SM) due March 30, 2004, which we refer to as the PERKS(SM). The issue price of
                              each PERKS is $     , which is one one-hundredth, or .01, of the value of the Nasdaq-100
                              Index on the day we offer the PERKS for initial sale to the public.

No guaranteed return          Unlike ordinary debt securities, the PERKS do not guarantee any return of principal at
of principal                  maturity.  Instead, the PERKS will pay an amount in cash equal to one one-hundredth the
                              final index value of the Nasdaq-100 Index times the multiplier, subject to a maximum
                              payment of $      per PERKS. If the final index value of the Nasdaq-100 Index is equal to
                              or greater than the initial index value of the Nasdaq-100 Index, the multiplier will be 100%.
                              But if the final index value is less than the initial index value, the multiplier will equal the
                              initial index value divided by the final index value, provided that the multiplier will not
                              exceed 133.34%. Investing in PERKS is not equivalent to investing in the Nasdaq-100
                              Index.

0.04% interest on the         We will pay interest on the PERKS, at the rate of 0.04% of the issue price per year,
issue price                   semi-annually on each March 30 and September 30, beginning September 30, 2001. The
                              interest rate we will pay on the PERKS is equal to the current dividend yield on the
                              Nasdaq-100 Index, but will not be adjusted for any future changes in the dividend yield.

The maximum payment           The appreciation potential of each PERKS is limited to $     per PERKS.
per PERKS is $

Payment at Maturity           Investing in PERKS is not equivalent to investing in the stocks included in the Nasdaq-100
                              Index. At maturity, for each PERKS you hold, we will pay to you an amount of cash equal
                              to the final index value times .01 times the multiplier, subject to a maximum payment of $
                              per PERKS.

                              If the final index value is greater than or equal to the initial index value, the multiplier
                              will be 100% and the payment amount per PERKS will be calculated as follows:

                               Payment at Maturity = Final Index Value * .01

                              subject to a maximum payment of $     per PERKS.


                                     PS-3
<PAGE>


                              If the final index value is less than the initial index value, the payment amount per
                              PERKS will be calculated as follows:

                               Payment at Maturity = Final Index Value * .01 * Multiplier

                              where the Multiplier is equal to:

                               Initial Index Value
                               -------------------
                                Final Index Value

                              provided that in no event will the Multiplier exceed 133.34%.

                              On the next page, we have provided a table and graph titled "Hypothetical Payments on the
                              PERKS." The table and graph illustrate the performance of the PERKS at maturity under
                              a variety of hypothetical index level scenarios. You should examine the table and graph for
                              examples of how the payout on the PERKS could be affected under these or other potential
                              index level scenarios. The table and graph do not show every situation that may occur.

Nasdaq-100 Index is           The closing value of the Nasdaq-100 Index on January 11, 2001, as published by The
currently at 2524.29          Nasdaq Stock Market, Inc., which we refer to as Nasdaq, was 2524.29. You can review the
                              publicly reported closing values of the Nasdaq-100 Index since 1996 in the "Historical
                              Information" section of this pricing supplement.  The payment of dividends on the stocks
                              which compose, or underlie, the Nasdaq-100 Index, which we refer to as the Nasdaq-100
                              Index Component Securities, is not reflected in the level of the Nasdaq-100 Index and,
                              therefore, has no effect on our calculation of the multiplier or the payment at maturity.  The
                              historical performance of the Nasdaq-100 Index should not be taken as an indication of what
                              the value of the Nasdaq-100 Index will be at maturity.

MS & Co. will be the          We have appointed our affiliate Morgan Stanley & Co. Incorporated, which we refer to as
Calculation Agent             MS & Co., to act as calculation agent for The Chase Manhattan Bank, the trustee for our
                              senior notes. As calculation agent, MS & Co. will determine the final index value and the
                              multiplier for the PERKS at maturity and calculate the payment at maturity.

Where you can find            The PERKS are senior notes issued as part of our Series C medium-term note program.
more information              You can find a general description of our Series C medium-term note program in the
on the PERKS                  accompanying prospectus supplement dated May 18, 2000. We describe the basic features
                              of this type of note in the sections called "Description of Notes--Fixed Rate Notes" and
                              "--Exchangeable Notes."

                              For a detailed description of terms of the PERKS including the specific mechanics and
                              timing of the payment determinations, you should read the "Description of PERKS"
                              section in this pricing supplement. You should also read about some of the risks
                              involved in investing in PERKS in the section called "Risk Factors." The tax and
                              accounting treatment of investments in equity-linked notes such as the PERKS may
                              differ from that of investments in ordinary debt securities or common stock. We urge
                              you to consult with your investment, legal, tax, accounting and other advisors with
                              regard to any proposed or actual investment in the PERKS.

How to reach us               You may contact your local Morgan Stanley Dean Witter branch office or our principal
                              executive offices at 1585 Broadway, New York, New York, 10036 (telephone number
                              (212)761-4000).
</TABLE>


                                     PS-4
<PAGE>


                      HYPOTHETICAL PAYMENTS ON THE PERKS

For each PERKS, the following table and graph illustrate, for a range of
hypothetical Final Index Values, the amount of cash you will receive at
maturity on each PERKS. The table and graph assume an Issue Price of $25.00,
an Initial Index Value of 2500, a maximum Multiplier of 133.34 and a maximum
Payment at Maturity of $50 per PERKS.

[GRAPHIC OMITTED]

Final    Initial     Index                               Initial       Cash
Index     Index     Percent    Exchange                   PERKS     Settlement
Value     Value     Change      Ratio      Multiplier     Price       Value
-----    -------    -------    --------    ----------    -------    ----------
6000      2500       140%        .01        100.00%      $25.00       $50.00
5750      2500       130%        .01        100.00%      $25.00       $50.00
5500      2500       120%        .01        100.00%      $25.00       $50.00
5250      2500       110%        .01        100.00%      $25.00       $50.00
5000      2500       100%        .01        100.00%      $25.00       $50.00
4750      2500        90%        .01        100.00%      $25.00       $47.50
4500      2500        80%        .01        100.00%      $25.00       $45.00
4250      2500        70%        .01        100.00%      $25.00       $42.50
4000      2500        60%        .01        100.00%      $25.00       $40.00
3750      2500        50%        .01        100.00%      $25.00       $37.50
3500      2500        40%        .01        100.00%      $25.00       $35.00
3250      2500        30%        .01        100.00%      $25.00       $32.50
3000      2500        20%        .01        100.00%      $25.00       $30.00
2750      2500        10%        .01        100.00%      $25.00       $27.50
2500      2500         0         .01        100.00%      $25.00       $25.00
2250      2500       -10%        .01        111.11%      $25.00       $25.00
2000      2500       -20%        .01        125.00%      $25.00       $25.00
1875      2500       -25%        .01        133.34%      $25.00       $25.00
1750      2500       -30%        .01        133.34%      $25.00       $23.33
1500      2500       -40%        .01        133.34%      $25.00       $20.00
1250      2500       -50%        .01        133.34%      $25.00       $16.67
1000      2500       -60%        .01        133.34%      $25.00       $13.33
 750      2500       -70%        .01        133.34%      $25.00       $10.00


                                     PS-5
<PAGE>


                                 RISK FACTORS

     The PERKS are not secured debt and are riskier than ordinary debt
securities. The payment you receive at maturity is linked to the performance of
the Nasdaq-100 Index, and the PERKS do not guarantee any return of principal.
To the extent that the final index value of the Nasdaq-100 Index at maturity is
less than 75% of the initial index value of the Nasdaq-100 Index, you will
receive less than your initial investment. This section describes the most
significant risks relating to the PERKS. You should carefully consider whether
the PERKS are suited to your particular circumstances before you decide to
purchase them.

<TABLE>
<S>                              <C>
PERKS Are Not                    The PERKS combine features of equity and debt.  The terms of the PERKS differ from
Ordinary Senior                  those of ordinary debt securities in that we will not pay you a fixed amount at maturity.
Notes -- No Guaranteed           Our payment to you at maturity will be an amount in cash based on the final index
Return of Principal              value of the Nasdaq-100 Index at maturity, subject to a maximum payment of $      per
                                 PERKS and a multiplier that protects your investment from a decline of up to 25% in
                                 the value of the Nasdaq-100 Index. If the final index value of the Nasdaq-100 Index
                                 at maturity is less than                (75% of the initial index value), we will pay to
                                 you an amount in cash based on the value of the Nasdaq-100 Index that is less
                                 than the issue price of the PERKS. Further, in the event the Nasdaq-100 Index
                                 were to decline substantially more than 25%, you could see a substantial or
                                 complete loss of your investment. See "Hypothetical Payments on the PERKS"
                                 above.

Your Appreciation                The $      issue price of one PERKS is equal to one one-hundredth of the closing value
Potential Is Limited             of the Nasdaq-100 Index on the day we priced this offer of PERKS. The maximum you
                                 can receive at maturity is $      per PERKS or      % of the issue price.  As a result, you
                                 will not share in any appreciation of the Nasdaq-100 Index above      % of the value of
                                 the Nasdaq-100 Index on the day we offer the PERKS for initial sale to the public. See
                                 "Hypothetical Payments on the PERKS" above.

Secondary Trading May            There may be little or no secondary market for the PERKS.  Although we will apply to
Be Limited                       list the PERKS on the American Stock Exchange, Inc., which we refer to as the AMEX,
                                 we may not meet the requirements for listing.  Even if there is a secondary market, it
                                 may not provide significant liquidity. MS & Co. currently intends to act as a market
                                 maker for PERKS but is not required to do so.

Market Price of the              Several factors, many of which are beyond our control, will influence the value of the
PERKS Influenced by              PERKS. We expect that generally the value of the Nasdaq-100 Index on any day
Many Unpredictable               will affect the value of the PERKS more than any other single factor. Other factors
Factors                          that may influence the value of the PERKS include:

                                 o      the volatility (frequency and magnitude of changes in value) of the
                                        Nasdaq-100 Index

                                 o      economic, financial, political, regulatory or judicial events that affect
                                        securities underlying the Nasdaq-100 Index or stock markets generally and
                                        which may affect the index value

                                 o      interest and yield rates in the market

                                 o      the time remaining to the maturity of the PERKS

                                 o      the dividend rate on the Nasdaq-100 Index component securities

                                 o      our creditworthiness


                                     PS-6
<PAGE>


                                 Some or all of these factors will influence the price you will receive if you sell your
                                 PERKS prior to maturity. For example, you may have to sell your PERKS at a
                                 discount from the issue price if the value of the Nasdaq-100 Index is less than the initial
                                 index value at the time you sell your PERKS.  This discount may be substantial if the
                                 value of the Nasdaq-100 Index is substantially below the initial index value at the time
                                 you sell your PERKS.

                                 You cannot predict the future performance of the Nasdaq-100 Index based on its
                                 historical performance. The value of the Nasdaq-100 Index may decrease so that the
                                 payment you will receive at maturity will be worth less than the issue price of the
                                 PERKS. We cannot guarantee that the value of the Nasdaq-100 Index will increase so
                                 that you will receive at maturity an amount in excess of the issue price of the PERKS or
                                 that the value of the Nasdaq-100 Index will not increase beyond      % of the initial
                                 index value. You will no longer share in the performance of the Nasdaq-100 Index at
                                 index values above      % of the initial index value.

Adjustments to the               Nasdaq is responsible for calculating and maintaining the Nasdaq-100 Index. Nasdaq
Nasdaq-100 Index Could           can add, delete or substitute the stocks underlying the Nasdaq-100 Index or make other
Adversely Affect the             methodological changes that could change the value of the Nasdaq-100 Index. Nasdaq
Value of the PERKS               may discontinue or suspend calculation or dissemination of the Nasdaq-100 Index.
                                 Any of these actions could adversely affect the value of the PERKS.

Our Hedging Activity             MS & Co. and its affiliates may carry out hedging activities related to PERKS or to
Could Adversely Affect           other instruments, including trading in the stocks included in the Nasdaq-100 Index as
the Value of the PERKS           well as in other instruments related to, based on or linked to the Nasdaq-100 Index.
                                 Any of these activities could adversely affect the value of the Nasdaq-100 Index and,
                                 accordingly, the value of the PERKS.

Because the                      You should also consider the tax consequences of investing in the PERKS. There is no
Characterization of the          statutory, judicial or administrative authority which directly addresses the
PERKS for Federal                characterization of the PERKS or instruments similar to the PERKS for U.S. federal
Income Tax Purposes is           income tax purposes, and therefore significant aspects of the tax treatment of the
Uncertain, the Material          PERKS are uncertain. Pursuant to the terms of the PERKS, MSDW and you agree to
Federal Income Tax               treat the PERKS as prepaid cash settlement forward contracts with respect to the
Consequences of an               Nasdaq-100 Index, as described in "Description of PERKS--United States Federal
Investment in the PERKS          Income Taxation--General." You will be required to characterize the PERKS for all
Are Uncertain                    tax purposes in this manner (absent an administrative determination or judicial ruling to
                                 the contrary) even if your tax advisor would otherwise adopt an alternative
                                 characterization. If the Internal Revenue Service ("IRS") were successful in asserting
                                 an alternative characterization for the PERKS, the timing and character of income on
                                 the PERKS may differ. We do not plan to request a ruling from the Internal Revenue
                                 Service ("IRS") regarding the tax treatment of the PERKS, and the IRS or a court may
                                 not agree with the tax treatment described in this pricing supplement.  Please read
                                 carefully the section "Description of PERKS--United States Federal Income
                                 Taxation" in this pricing supplement.
</TABLE>


                                     PS-7
<PAGE>


                             DESCRIPTION OF PERKS

Terms not defined herein have the meanings given to such terms in the
accompanying prospectus supplement.  The term "PERKS" refers to each $
principal amount of our PERKS due March 30, 2004, Mandatorily Exchangeable For
an Amount Payable in U.S. Dollars based on the Value of the Nasdaq-100 Index.
In this pricing supplement, the terms "MSDW," "we," "us," and "our" refer to
Morgan Stanley Dean Witter & Co.

Principal Amount..............   $

Original Issue Date
(Settlement Date).............   January        , 2001

Maturity Date.................   March 30, 2004

Specified Currency............   U.S. Dollars

Issue Price...................   $     per PERKS

Interest Rate.................   0.04% per annum

Record Date...................   The Record Date for each Interest Payment
                                 Date, including the Maturity Date, will be
                                 the date 15 calendar days prior to such
                                 Interest Payment Date, whether or not that
                                 date is a Business Day.

Interest Payment Dates........   Each March 30 and September 30, beginning
                                 September 30, 2001

CUSIP.........................   61744Y660

Denominations.................   $     and integral multiples thereof

Initial Index Value...........

Final Index Value.............   The Final Index Value will be the Index
                                 Closing Value on the fourth scheduled Trading
                                 Day prior to the Maturity Date.

                                 If a Market Disruption Event occurs on the
                                 fourth scheduled Trading Day prior to the
                                 Maturity Date, the Final Index Value will be
                                 determined on the immediately succeeding
                                 Trading Day during which no Market Disruption
                                 Event occurs; provided that the Final Index
                                 Value will not be determined on a date later
                                 than the second scheduled Trading Day
                                 preceding the Maturity Date, and if such date
                                 is not a Trading Day, or if there is a Market
                                 Disruption Event on such date, the
                                 Calculation Agent will determine the value of
                                 the Nasdaq- 100 Index on such date in
                                 accordance with the formula for and method of
                                 calculating the Nasdaq-100 Index last in
                                 effect prior to the commencement of the
                                 Market Disruption Event (or prior to the
                                 non-Trading Day), using the closing price
                                 (or, if trading in the relevant securities
                                 has been materially suspended or materially
                                 limited, its good faith estimate of the
                                 closing price that would have prevailed but
                                 for such suspension or limitation or
                                 non-Trading Day) on such date of each
                                 security most recently constituting the
                                 Nasdaq-100 Index.

Multiplier....................   The Multiplier will be based on the Final
                                 Index Value, and will be determined as
                                 follows:


                                     PS-8
<PAGE>


                                 If the Final Index Value is greater than or
                                 equal to the Initial Index Value:

                                    Multiplier = 100%

                                 If Final Index Value is less than the Initial
                                 Index Value:

                                    Multiplier =  Initial Index Value
                                                  -------------------
                                                   Final Index Value

                                 provided that in no event will the Multiplier
                                 exceed 133.34%

Cash Settlement Value.........   The Cash Settlement Value equals a dollar
                                 amount of cash per PERKS calculated as
                                 follows:

                                    Cash Settlement Value = Final Index Value
                                    * .01 * Multiplier

                                 provided that in no event will the Cash
                                 Settlement Value exceed $      .

Payment at Maturity...........   At maturity, upon delivery of each PERKS to
                                 the Trustee, we will pay for each PERKS an
                                 amount in cash equal to the Cash Settlement
                                 Value, plus any accrued but unpaid interest.

                                 All calculations with respect to the Final
                                 Index Value, the Multiplier and the Cash
                                 Settlement Value of the PERKS will be rounded
                                 to the nearest one ten-millionth, with five
                                 hundred-millionths rounded upwards (e.g.,
                                 .98765435 would be rounded to .9876544) and
                                 all dollar amounts related to payments at
                                 maturity resulting from such calculations
                                 will be rounded to the nearest cent with
                                 one-half cent being rounded upwards.

                                 We shall, or shall cause the Calculation
                                 Agent to, (i) provide written notice to the
                                 Trustee and to the Depositary, on or prior to
                                 10:30 a.m. on the Trading Day immediately
                                 prior to maturity of the PERKS, of the
                                 payment to be delivered with respect to each
                                 PERKS and (ii) deliver such payment in cash
                                 to the Trustee for delivery to the holders.

Trading Day...................   A day, as determined by the Calculation
                                 Agent, on which trading is generally
                                 conducted on the New York Stock Exchange, Inc.
                                 ("NYSE"), the AMEX, the Nasdaq National
                                 Market, the Chicago Mercantile Exchange, and
                                 the Chicago Board of Options Exchange and in
                                 the over-the-counter market for equity
                                 securities in the United States.

Index Closing Value...........   The Index Closing Value on any Trading Day
                                 will equal the closing value of the
                                 Nasdaq-100 Index or any Successor Index at
                                 the regular official weekday close of the
                                 principal trading session of the Nasdaq
                                 National Market on that Trading Day. See
                                 "--Discontinuance of the Nasdaq-100 Index;
                                 Alteration of Method of Calculation."

Optional Redemption...........   We will not redeem the PERKS prior to the
                                 Maturity Date.

Book Entry Note
or Certificated Note..........   Book Entry


                                     PS-9
<PAGE>


Senior Note or Subordinated
Note..........................   Senior

Trustee.......................   The Chase Manhattan Bank

Agent for the underwritten
offering of the PERKS.........   MS & Co.

Market Disruption Event.......   "Market Disruption Event" means with respect
                                 to the Nasdaq-100 Index, the occurrence or
                                 existence of either of the following events
                                 as determined by the Calculation Agent:

                                    (i) a suspension, material limitation or
                                    absence of trading of stocks then
                                    constituting 20 percent or more of the
                                    level of the Nasdaq-100 Index (or the
                                    relevant Successor Index) on the Relevant
                                    Exchanges for such securities for more
                                    than two hours of trading or during the
                                    one-half hour period preceding the close
                                    of the principal trading session on such
                                    Relevant Exchange or a breakdown or
                                    failure in the price and trading systems
                                    of any Relevant Exchange as a result of
                                    which the reported trading prices for
                                    stocks then constituting 20 percent or
                                    more of the level of the Nasdaq-100 Index
                                    (or the relevant Successor Index) during
                                    the last one-half hour preceding the
                                    closing of the principal trading session
                                    on such Relevant Exchange are materially
                                    inaccurate; or the suspension, material
                                    limitation or absence of trading on any
                                    major U.S. securities market of trading in
                                    futures or options contracts related to the
                                    Nasdaq-100 Index (or the relevant
                                    Successor Index) for more than two hours
                                    of trading or during the one-half hour
                                    period preceding the close of the
                                    principal trading session on such market;
                                    and

                                    (ii)  a determination by the Calculation
                                    Agent in its sole discretion that the
                                    event described in clause (i) above
                                    materially interfered with the ability of
                                    MSDW or any of its affiliates to adjust or
                                    unwind all or a material portion of the
                                    hedge with respect to the PERKS.

                                 For the purpose of determining whether a
                                 Market Disruption Event exists at any time,
                                 if trading in a security included in the
                                 Nasdaq-100 Index is materially suspended or
                                 materially limited at that time, then the
                                 relevant percentage contribution of that
                                 security to the level of the Nasdaq-100 Index
                                 shall be based on a comparison of (x) the
                                 portion of the level of the Nasdaq-100 Index
                                 attributable to that security relative to (y)
                                 the overall level of the Nasdaq-100 Index, in
                                 each case immediately before that suspension
                                 or limitation.

                                 For purposes of determining whether a Market
                                 Disruption Event has occurred: (1) a
                                 limitation on the hours or number of days of
                                 trading will not constitute a Market
                                 Disruption Event if it results from an
                                 announced change in the regular business
                                 hours of the relevant exchange or market, (2)
                                 a decision to permanently discontinue trading
                                 in the relevant futures or options contract
                                 will not constitute a Market Disruption
                                 Event, (3) limitations pursuant to the rules
                                 of any Relevant Exchange similar to NYSE Rule
                                 80A (or any applicable rule or regulation
                                 enacted or promulgated by any other
                                 self-regulatory organization or any
                                 government agency of


                                     PS-11
<PAGE>


                                 similar scope as determined by the Calculation
                                 Agent) on trading during significant market
                                 fluctuations will constitute a suspension,
                                 absence or material limitation of trading, (4)
                                 a suspension of trading in a futures or
                                 options contract on the Nasdaq-100 Index by
                                 the primary securities market related to such
                                 contract by reason of (a) a price change
                                 exceeding limits set by such exchange or
                                 market, (b) an imbalance of orders relating to
                                 such contracts or (c) a disparity in bid and
                                 ask quotes relating to such contracts will
                                 constitute a suspension or material limitation
                                 of trading in futures or options contracts
                                 related to the Nasdaq-100 Index and (5) a
                                 "suspension, absence or material limitation of
                                 trading" on any Relevant Exchange or on the
                                 primary market on which futures or options
                                 contracts related to the Nasdaq-100 Index are
                                 traded will not include any time when such
                                 market is itself closed for trading under
                                 ordinary circumstances.

Relevant Exchange.............   "Relevant Exchange" means the primary U.S.
                                 organized exchange or market of trading for
                                 any security (or any combination thereof)
                                 then included in the Nasdaq-100 Index or any
                                 Successor Index.

Calculation Agent.............   MS & Co.

                                 All determinations made by the Calculation
                                 Agent will be at the sole discretion of the
                                 Calculation Agent and will, in the absence of
                                 manifest error, be conclusive for all
                                 purposes and binding on you and on us.

                                 Because the Calculation Agent is our
                                 affiliate, the economic interests of the
                                 Calculation Agent and its affiliates may be
                                 adverse to your interests, as the holder of
                                 the PERKS, including with respect to certain
                                 determinations and judgments that the
                                 Calculation Agent must make in determining
                                 whether a Market Disruption Event has
                                 occurred, which could in turn adversely affect
                                 the Cash Settlement Value you receive at
                                 maturity. See "Discontinuance of the
                                 Nasdaq-100 Index; Alteration of Method of
                                 Calculation" below and "Market Disruption
                                 Event" above. MS & Co., as a registered
                                 broker-dealer, is required to maintain
                                 policies and procedures regarding the
                                 handling and use of confidential proprietary
                                 information, and such policies and procedures
                                 will be in effect throughout the term of the
                                 PERKS to restrict the use of information
                                 relating to the calculation of the Final
                                 Index Value, the Multiplier and the Cash
                                 Settlement Value prior to the dissemination
                                 of such information. MS & Co. is obligated
                                 to carry out its duties and functions as
                                 Calculation Agent in good faith and using its
                                 reasonable judgment.

Nasdaq-100 Index..............   We have derived all information contained in
                                 this pricing supplement  regarding the
                                 Nasdaq-100 Index, including, without
                                 limitation, its make-up, method of
                                 calculation and changes in its components,
                                 from publicly available information. Such
                                 information reflects the policies of, and is
                                 subject to change by, Nasdaq. The Nasdaq-100
                                 Index was developed by Nasdaq, is calculated
                                 and maintained by Nasdaq and was first
                                 published in January 1985.

                                 The Nasdaq-100 Index is a modified
                                 capitalization-weighted index of 100 of the
                                 largest non-financial companies listed on the
                                 Nasdaq


                                     ps-12
<PAGE>


                                 National Market tier of the Nasdaq Stock
                                 Market. The Nasdaq-100 Index constitutes a
                                 broadly diversified segment of the largest and
                                 most actively traded securities listed on the
                                 Nasdaq Stock Market, and includes companies
                                 across a variety of major industry groups. At
                                 any moment in time, the value of the
                                 Nasdaq-100 Index equals the aggregate value of
                                 the then-current Nasdaq-100 Index share
                                 weights of each of the Nasdaq-100 Index
                                 Component Securities, which are based on the
                                 total shares outstanding of each such
                                 Nasdaq-100 Index Component Security,
                                 multiplied by each such security's respective
                                 last sale price on the Nasdaq Stock Market,
                                 and divided by a scaling factor (the
                                 "divisor"), which becomes the basis for the
                                 reported Nasdaq-100 Index value. The divisor
                                 serves the purpose of scaling such aggregate
                                 value (otherwise in the trillions) to a lower
                                 order of magnitude which is more desirable for
                                 Nasdaq-100 Index reporting purposes.

                                 To be eligible for inclusion in the Nasdaq-100
                                 Index, a security must be traded on the Nasdaq
                                 National Market tier of the Nasdaq Stock
                                 Market and meet the other eligibility
                                 criteria, including the following: the
                                 security must be of a non-financial company;
                                 only one class of security per issuer is
                                 allowed; the security may not be issued by an
                                 issuer currently in bankruptcy proceedings;
                                 the security must have average daily trading
                                 volume of at least 100,000 shares per day; the
                                 security must have been listed on a market for
                                 at least two years (in the case of a spin-off,
                                 the operating history of the spin-off will be
                                 considered), or a one year period if a
                                 security would otherwise qualify to be in the
                                 top 25% of the issuers included in the
                                 Nasdaq-100 Index by market capitalization; if
                                 the security is of a foreign issuer, the
                                 company must have a worldwide market value of
                                 at least $10 billion, a U.S. market value of
                                 at least $4 billion, and average trading
                                 volume on the Nasdaq Stock Market of at least
                                 200,000 shares per day; in addition, foreign
                                 securities must be eligible for listed options
                                 trading; and the issuer of the security may
                                 not have entered into a definitive agreement
                                 or other arrangement which would result in the
                                 security no longer being listed on the Nasdaq
                                 Stock Market within the next six months.

                                 The securities in the Nasdaq-100 Index are
                                 monitored every day by Nasdaq with respect to
                                 changes in total shares outstanding arising
                                 from secondary offerings, stock repurchases,
                                 conversions, or other corporate actions. The
                                 following quarterly scheduled weight
                                 adjustment procedures have been adopted to
                                 adjust for such changes. If the change in
                                 total shares outstanding arising from such
                                 corporate action is greater than or equal to
                                 5.0%, such change is ordinarily made to the
                                 Nasdaq-100 Index on the evening prior to the
                                 effective date of such corporate action.
                                 Otherwise, if the change in total shares
                                 outstanding is less than 5.0%, then all such
                                 changes are accumulated and made effective at
                                 one time on a quarterly basis after the close
                                 of trading on the third Friday in each of
                                 March, June, September, and December. In
                                 either case, the Nasdaq-100 Index share
                                 weights for such Nasdaq-100 Index Component
                                 Securities are adjusted by the same percentage
                                 amount by which the total shares outstanding
                                 have changed in such Nasdaq-100 Index
                                 Component Securities. Ordinarily, whenever
                                 there is a change in Nasdaq-100 Index share
                                 weights or a change in a component security
                                 included in the Nasdaq-100 Index, Nasdaq


                                     PS-13
<PAGE>


                                 adjusts the divisor to assure that there is no
                                 discontinuity in the value of the Nasdaq-100
                                 Index which might otherwise be caused by any
                                 such change.

                                 Additionally, Nasdaq may periodically
                                 (ordinarily, several times per quarter)
                                 replace one or more component securities in
                                 the Nasdaq-100 Index due to mergers,
                                 acquisitions, bankruptcies, or other market
                                 conditions, or due to delisting if an issuer
                                 chooses to list its securities on another
                                 marketplace, or if the issuers of such
                                 component securities fail to meet the criteria
                                 for continued inclusion in the Nasdaq-100
                                 Index.

                                 The Nasdaq-100 Index share weights are also
                                 subject, in certain cases, to a rebalancing in
                                 order to ensure that the relative weightings
                                 of the index securities continue to meet
                                 minimum pre-established requirements for a
                                 diversified portfolio (see "Rebalancing of the
                                 Nasdaq-100 Index for Modified
                                 Capitalization-weighted Methodology" below).

                                 The table under "Historical Information" below
                                 shows the actual performance of the Nasdaq-100
                                 Index for the period between January 1, 1996
                                 and January 11, 2001. Stock prices fluctuated
                                 widely during this period and were higher at
                                 the end than at the beginning. The results
                                 shown should not be considered as a
                                 representation of the income yield or capital
                                 gain or loss that may be generated by the
                                 Nasdaq-100 Index in the future. In addition,
                                 after the close of trading on December 18,
                                 1998, the Nasdaq-100 Index share weights of
                                 the Nasdaq-100 Index Component Securities were
                                 rebalanced in accordance with the "modified
                                 capitalization weighted" methodology
                                 implemented on such date (see "Rebalancing of
                                 the Nasdaq-100 Index for Modified
                                 Capitalization-weighted Methodology" below).
                                 As a result, the performance of the Nasdaq-100
                                 Index after December 18, 1998 reflects the
                                 performance of the Nasdaq-100 Index Component
                                 Securities as calculated in accordance with
                                 the revised Nasdaq-100 Index methodology.

                                 Annual Ranking Review

                                 The Nasdaq-100 Index Component Securities are
                                 evaluated annually, the "Annual Ranking
                                 Review," as described below. Securities listed
                                 on the Nasdaq Stock Market which meet the
                                 eligibility criteria described above are
                                 ranked by market value. Nasdaq-100
                                 Index-eligible securities which are already in
                                 the Nasdaq-100 Index and which are in the top
                                 150 eligible securities (based on market
                                 value) are retained in the Nasdaq-100 Index
                                 provided that such security was ranked in the
                                 top 100 eligible securities as of the previous
                                 year's annual review. Securities not meeting
                                 such criteria are replaced. The replacement
                                 securities chosen are the largest market
                                 capitalization Nasdaq-100 Index-eligible
                                 securities not currently in the Nasdaq-100
                                 Index. The list of annual additions and
                                 deletions is publicly announced via a press
                                 release in the early part of December.
                                 Replacements are made effective after the
                                 close of trading on the third Friday in
                                 December. Moreover, if at any time during the
                                 year a Nasdaq-100 Index Component Security is
                                 no longer traded on the Nasdaq Stock Market,
                                 or is otherwise determined by Nasdaq to become
                                 ineligible


                                     PS-13
<PAGE>


                                 for continued inclusion in the Nasdaq-100
                                 Index, the security will be replaced with the
                                 largest market capitalization security not
                                 currently in the Nasdaq-100 Index and meeting
                                 the Nasdaq-100 Index eligibility criteria
                                 listed above.

                                 Rebalancing of the Nasdaq-100 Index for
                                 Modified Capitalization-weighted Methodology

                                 Effective after the close of trading on
                                 December 18, 1998, the Nasdaq-100 Index has
                                 been calculated under a "modified
                                 capitalization-weighted" methodology, which is
                                 a hybrid between equal weighting and
                                 conventional capitalization weighting. This
                                 methodology is expected to: (1) retain in
                                 general the economic attributes of
                                 capitalization weighting; (2) promote
                                 portfolio weight diversification (thereby
                                 limiting domination of the Nasdaq-100 Index by
                                 a few large stocks); (3) reduce Nasdaq-100
                                 Index performance distortion by preserving the
                                 capitalization ranking of companies; and (4)
                                 reduce market impact on the smallest
                                 Nasdaq-100 Index Component Securities from
                                 necessary weight rebalancings.

                                 Under the methodology employed, on a quarterly
                                 basis coinciding with Nasdaq's quarterly
                                 scheduled weight adjustment procedures
                                 described above, the Nasdaq-100 Index
                                 Component Securities are categorized as either
                                 "Large Stocks" or "Small Stocks" depending on
                                 whether their current percentage weights
                                 (after taking into account such scheduled
                                 weight adjustments due to stock repurchases,
                                 secondary offerings, or other corporate
                                 actions) are greater than, less than or equal
                                 to, the average percentage weight in the
                                 Nasdaq-100 Index (i.e., as a 100-stock index,
                                 the average percentage weight in the
                                 Nasdaq-100 Index is 1.0%).

                                 Such quarterly examination will result in an
                                 Nasdaq-100 Index rebalancing if either one or
                                 both of the following two weight distribution
                                 requirements are not met: (1) the current
                                 weight of the single largest market
                                 capitalization Nasdaq-100 Index Component
                                 Security must be less than or equal to 24.0%
                                 and (2) the "collective weight" of those
                                 Nasdaq-100 Index Component Securities whose
                                 individual current weights are in excess of
                                 4.5%, when added together, must be less than
                                 or equal to 48.0%.

                                 If either one or both of these weight
                                 distribution requirements are not met upon
                                 quarterly review, a weight rebalancing will be
                                 performed in accordance with the following
                                 plan. First, relating to weight distribution
                                 requirement (1) above, if the current weight
                                 of the single largest Nasdaq-100 Index
                                 Component Security exceeds 24.0%, then the
                                 weights of all Large Stocks will be scaled
                                 down proportionately towards 1.0% by enough
                                 for the adjusted weight of the single largest
                                 Nasdaq-100 Index Security to be set to 20.0%.
                                 Second, relating to weight distribution
                                 requirement (2) above, for those Nasdaq-100
                                 Index Component Securities whose individual
                                 current weights or adjusted weights in
                                 accordance with the preceding step are in
                                 excess of 4.5%, if their "collective weight"
                                 exceeds 48.0%, then the weights of all Large
                                 Stocks will be scaled down proportionately
                                 towards 1.0% by just enough for the
                                 "collective weight," so adjusted, to be set to
                                 40.0%.


                                     PS-14
<PAGE>


                                 The aggregate weight reduction among the Large
                                 Stocks resulting from either or both of the
                                 above rescalings will then be redistributed to
                                 the Small Stocks in the following iterative
                                 manner. In the first iteration, the weight of
                                 the largest Small Stock will be scaled upwards
                                 by a factor which sets it equal to the average
                                 Nasdaq-100 Index weight of 1.0%. The weights
                                 of each of the smaller remaining Small Stocks
                                 will be scaled up by the same factor reduced
                                 in relation to each stock's relative ranking
                                 among the Small Stocks so that the smaller the
                                 Nasdaq-100 Index Component Security in the
                                 ranking, the less the scale-up of its weight.
                                 This is intended to reduce the market impact
                                 of the weight rebalancing on the smallest
                                 component securities in the Nasdaq-100 Index.

                                 In the second iteration, the weight of the
                                 second largest Small Stock, already adjusted
                                 in the first iteration, will be scaled upwards
                                 by a factor which sets it equal to the average
                                 index weight of 1.0%. The weights of each of
                                 the smaller remaining Small Stocks will be
                                 scaled up by this same factor reduced in
                                 relation to each stock's relative ranking
                                 among the Small Stocks such that, once again,
                                 the smaller the stock in the ranking, the less
                                 the scale-up of its weight.

                                 Additional iterations will be performed until
                                 the accumulated increase in weight among the
                                 Small Stocks exactly equals the aggregate
                                 weight reduction among the Large Stocks from
                                 rebalancing in accordance with weight
                                 distribution requirement (1) and/or weight
                                 distribution requirement (2).

                                 Then, to complete the rebalancing procedure,
                                 once the final percent weights of each
                                 Nasdaq-100 Index Security are set, the
                                 Nasdaq-100 Index share weights will be
                                 determined anew based upon the last sale
                                 prices and aggregate capitalization of the
                                 index at the close of trading on the Thursday
                                 in the week immediately preceding the week of
                                 the third Friday in March, June, September,
                                 and December. Changes to the Nasdaq-100 Index
                                 share weights will be made effective after the
                                 close of trading on the third Friday in March,
                                 June, September, and December and an
                                 adjustment to the Nasdaq-100 Index divisor
                                 will be made to ensure continuity of the
                                 Nasdaq-100 Index.

                                 In this pricing supplement, unless the context
                                 requires otherwise, references to the
                                 Nasdaq-100 Index will include any Successor
                                 Index and references to Nasdaq will include
                                 any successor to the Nasdaq Stock Market.

Discontinuance of the
Nasdaq-100 Index; Alteration
of Method of Calculation......   If Nasdaq discontinues publication of the
                                 Nasdaq-100 Index and Nasdaq or another entity
                                 publishes a successor or substitute index
                                 that MS & Co. as the Calculation Agent
                                 determines, in its sole discretion, to be
                                 comparable to the discontinued Nasdaq-100
                                 Index (such index being referred to herein as
                                 a "Successor Index"), then any subsequent
                                 Index Closing Value will be determined by
                                 reference to the value of such Successor
                                 Index at the close of trading on the NYSE,
                                 the AMEX, Nasdaq National Market or the
                                 relevant exchange or market for the Successor
                                 Index on the date that any Index Closing
                                 Value is to be determined.


                                     PS-15
<PAGE>


                                 Upon any selection by the Calculation Agent
                                 of a Successor Index, the Calculation Agent
                                 will cause written notice thereof to be
                                 furnished to the Trustee, to MSDW and to the
                                 holders of the PERKS within three Trading
                                 Days of such selection.

                                 If Nasdaq discontinues publication of the
                                 Nasdaq-100 Index prior to, and such
                                 discontinuance is continuing on, the date that
                                 any Index Closing Value is to be determined
                                 and MS & Co., as the Calculation Agent,
                                 determines that no Successor Index is
                                 available at such time, then, on such date,
                                 the Calculation Agent will determine the Final
                                 Index Value to be used in computing the
                                 Multiplier and the Cash Settlement Value of
                                 the PERKS. The Final Index Value will be
                                 computed by the Calculation Agent in
                                 accordance with the formula for and method of
                                 calculating the Nasdaq-100 Index last in
                                 effect prior to such discontinuance, using the
                                 closing price (or, if trading in the relevant
                                 securities has been materially suspended or
                                 materially limited, its good faith estimate of
                                 the closing price that would have prevailed
                                 but for such suspension or limitation) at the
                                 close of the principal trading session on such
                                 date of each security most recently comprising
                                 the Nasdaq-100 Index on the Relevant Exchange.
                                 Notwithstanding these alternative
                                 arrangements, discontinuance of the
                                 publication of the Nasdaq-100 Index may
                                 adversely affect the value of the PERKS.

                                 If at any time the method of calculating the
                                 Nasdaq-100 Index or a Successor Index, or the
                                 value thereof, is changed in a material
                                 respect, or if the Nasdaq-100 Index or a
                                 Successor Index is in any other way modified
                                 so that such index does not, in the opinion of
                                 MS & Co., as the Calculation Agent, fairly
                                 represent the value of the Nasdaq-100 Index or
                                 such Successor Index had such changes or
                                 modifications not been made, then, from and
                                 after such time, the Calculation Agent will,
                                 at the close of business in New York City on
                                 the date that the Final Index Value is to be
                                 determined, make such calculations and
                                 adjustments as, in the good faith judgment of
                                 the Calculation Agent, may be necessary in
                                 order to arrive at a value of a stock index
                                 comparable to the Nasdaq-100 Index or such
                                 Successor Index, as the case may be, as if
                                 such changes or modifications had not been
                                 made, and calculate the Final Index Value and
                                 the Multiplier with reference to the
                                 Nasdaq-100 Index or such Successor Index, as
                                 adjusted. Accordingly, if the method of
                                 calculating the Nasdaq-100 Index or a
                                 Successor Index is modified so that the value
                                 of such index is a fraction of what it would
                                 have been if it had not been modified (e.g.,
                                 due to a split in the index), then the
                                 Calculation Agent will adjust such index in
                                 order to arrive at a value of the Nasdaq-100
                                 Index or such Successor Index as if it had not
                                 been modified (e.g., as if such split had not
                                 occurred).

Alternate Cash Settlement
Calculation in case of an
Event of Default..............   In case an Event of Default with respect to
                                 the PERKS shall have occurred and be
                                 continuing, the amount declared due and
                                 payable upon any acceleration of any PERKS
                                 shall be determined by MS & Co., as
                                 Calculation Agent, and shall be equal to (i)
                                 the Cash Settlement Value, calculated using
                                 as the Final Index Value the Index Closing
                                 Value for the first Trading Day immediately
                                 preceding the date of acceleration on which
                                 no Market Disruption Event shall have
                                 occurred and (ii) any accrued but unpaid
                                 interest.


                                     PS-16
<PAGE>


Historical Information........   The following table sets forth the high and
                                 low Index Closing Values, as well as
                                 end-of-quarter closing values, of the
                                 Nasdaq-100 Index for each quarter in the
                                 period from January 1, 1996 through January
                                 11, 2001. We obtained the Index Closing
                                 Values listed below from Bloomberg Financial
                                 Markets, and we believe such information to
                                 be accurate. The results shown should not be
                                 considered as a representation of the income,
                                 yield or capital gain or loss that may be
                                 generated by the Nasdaq-100 Index in the
                                 future. In addition, after the close of
                                 trading on December 18, 1998, the Nasdaq-100
                                 Index share weights of the Nasdaq-100 Index
                                 Component Securities were rebalanced in
                                 accordance with the "modified capitalization
                                 weighted" methodology implemented on such
                                 date (see "-Rebalancing of the Nasdaq-100
                                 Index for Modified Capitalization-weighted
                                 Methodology" above). As a result, the
                                 performance of the Nasdaq-100 Index after
                                 December 18, 1998 reflects the performance of
                                 the Nasdaq-100 Index Component Securities as
                                 calculated in accordance with the revised
                                 Nasdaq-100 Index methodology.

                                 The value of the Nasdaq-100 Index may decrease
                                 so that you will receive a payment at maturity
                                 worth less than the issue price of the PERKS.
                                 We cannot give you any assurance that the
                                 value of the Nasdaq-100 Index will increase so
                                 that at maturity you will receive an amount in
                                 excess of the issue price of the PERKS.
                                 Because your return is linked to the value of
                                 the Nasdaq-100 Index at maturity, there is no
                                 guaranteed return of principal. To the extent
                                 that the Final Index Value is less than 75% of
                                 the Initial Index Value and the shortfall is
                                 not offset by the interest paid on the PERKS,
                                 you will lose money on your investment.

                                                                         Period-
                                                         High     Low      end
                                                         ----     ---    -------
                                 1996
                                 First Quarter......... 643.41   534.42   609.69
                                 Second Quarter........ 699.35   604.07   677.30
                                 Third Quarter......... 745.73   598.34   737.58
                                 Fourth Quarter........ 856.64   731.21   821.36
                                 1997
                                 First Quarter......... 925.52   797.06   797.06
                                 Second Quarter........ 989.37   783.92   957.30
                                 Third Quarter.........1145.07   953.44  1097.17
                                 Fourth Quarter........1148.21   938.99   990.80
                                 1998
                                 First Quarter.........1220.66   956.19  1220.66
                                 Second Quarter........1339.71  1163.98  1337.34
                                 Third Quarter.........1465.89  1140.34  1345.48
                                 Fourth Quarter........1836.01  1128.88  1836.01
                                 1999
                                 First Quarter.........2144.66  1854.39  2106.39
                                 Second Quarter........2296.77  1967.84  2296.77
                                 Third Quarter.........2545.41  2163.77  2407.90
                                 Fourth Quarter........3707.83  2362.11  3707.83
                                 2000
                                 First Quarter.........4704.73  3340.81  4397.84
                                 Second Quarter........4291.53  3023.42  3763.79
                                 Third Quarter.........4099.30  3477.31  3570.61
                                 Fourth Quarter........3457.97  2210.32  2341.70
                                 2001
                                 First Quarter
                                  (through
                                   January 11, 2001)...2528.38  2128.78  2524.29


                                     PS-17
<PAGE>


Use of Proceeds and Hedging...   The net proceeds we receive from the sale of
                                 the PERKS will be used for general corporate
                                 purposes and, in part, by us or one or more
                                 of our subsidiaries in connection with
                                 hedging our obligations under the PERKS.  See
                                 also "Use of Proceeds" in the accompanying
                                 prospectus.

                                 On or prior to the date of this pricing
                                 supplement, we, through our subsidiaries or
                                 others, may hedge our anticipated exposure in
                                 connection with the PERKS by taking positions
                                 in individual stocks included in the
                                 Nasdaq-100 Index, by the purchase and sale of
                                 exchange traded and over-the-counter options
                                 on the Nasdaq-100 Index, futures contracts on
                                 the Nasdaq-100 Index and options on such
                                 futures contracts or by taking positions in
                                 any other available securities or instruments
                                 that we may wish to use in connection with
                                 such hedging. In the event that we pursue such
                                 a hedging strategy, the price at which we are
                                 able to purchase such positions may be a
                                 factor in determining the pricing of the
                                 PERKS. Purchase activity could potentially
                                 increase the price of the Nasdaq-100 Index and
                                 therefore effectively increase the level to
                                 which the Nasdaq-100 Index must rise before
                                 you would receive at maturity cash in an
                                 amount worth more than the issue price of the
                                 PERKS. Although we have no reason to believe
                                 that our hedging activity will have a material
                                 impact on the price of the Nasdaq-100 Index,
                                 we cannot give any assurance that we will not
                                 affect such price as a result of our hedging
                                 activities. Through our subsidiaries, we are
                                 likely to modify our hedge position throughout
                                 the life of the PERKS by taking positions in
                                 individual stocks included in the Nasdaq-100
                                 Index, by the purchase and sale of exchange
                                 traded and over-the-counter options on the
                                 Nasdaq-100 Index, futures contracts on the
                                 Nasdaq-100 Index and options on such futures
                                 contracts or by taking positions in any other
                                 available securities or instruments that we
                                 may wish to use in connection with such
                                 hedging.

Supplemental Information
Concerning Plan of
Distribution..................   Under the terms and subject to conditions
                                 contained in the U.S. distribution agreement
                                 referred to in the prospectus supplement
                                 under "Plan of Distribution," the Agent,
                                 acting as principal for its own account, has
                                 agreed to purchase, and we have agreed to
                                 sell, the principal amount of PERKS set forth
                                 on the cover of this pricing supplement. The
                                 Agent initially proposes to offer part of the
                                 PERKS directly to the public at the public
                                 offering price set forth on the cover page of
                                 this pricing supplement and part to Advest,
                                 Inc., Robert W. Baird & Co., A.G. Edwards &
                                 Sons, Inc., Janney Montgomery Scott LLC, Legg
                                 Mason Wood Walker Incorporated and McDonald
                                 Investments Inc., the selling group, at a
                                 price the represents a concession not in
                                 excess of      % of the principal amount of
                                 the PERKS. The Agent may allow, and those
                                 dealers may reallow, a concession not in
                                 excess of      % of the principal amount of
                                 the PERKS to certain other dealers. We
                                 expect to deliver the PERKS against payment
                                 therefor in New York, New York on             ,
                                 2001. After the initial offering of the
                                 PERKS, the Agent may vary the offering price
                                 and other selling terms from time to time.

                                 Delivery of approximately     % of the PERKS
                                 to a purchaser of 100,000 or more PERKS at
                                 the reduced price referred to in the


                                     PS-18
<PAGE>


                                 cover page of this pricing supplement (the
                                 "Delivered PERKS") will be made on the date of
                                 delivery of the PERKS referred to on the
                                 preceding paragraph. The balance of
                                 approximately % of the PERKS (the "Escrowed
                                 PERKS") purchased by each such investor will
                                 be held in escrow at MS & Co. for the benefit
                                 of the investor and delivered to such investor
                                 if the investor and any accounts in which the
                                 investor may have deposited any of its
                                 Delivered PERKS have held all of the Delivered
                                 PERKS for 45 calendar days following the date
                                 of the pricing supplement or any shorter
                                 period deemed appropriate by the Agent. If an
                                 investor or any account in which the investor
                                 has deposited any of its Delivered PERKS fails
                                 to satisfy the holding period requirement, as
                                 determined by the Agent, all of the investor's
                                 Escrowed PERKS will be forfeited by the
                                 investor and not delivered to it. The Escrowed
                                 PERKS will instead be delivered to the Agent
                                 for sale to investors. This forfeiture will
                                 have the effect of increasing the purchase
                                 price per PERKS for such investors to 100% of
                                 the principal amount of the PERKS. Should
                                 investors who are subject to the holding
                                 period requirement sell their PERKS once the
                                 holding period is no longer applicable, the
                                 market price of the PERKS may be adversely
                                 affected. See also "Plan of Distribution" in
                                 the accompanying prospectus supplement.

                                 In order to facilitate the offering of the
                                 PERKS, the Agent may engage in transactions
                                 that stabilize, maintain or otherwise affect
                                 the price of the PERKS or the Nasdaq-100
                                 Index. Specifically, the Agent may sell more
                                 PERKS than it is obligated to purchase in
                                 connection with the offering or may sell
                                 individual stocks included in the Nasdaq-100
                                 Index it does not own, creating a naked short
                                 position in the PERKS or individual stocks
                                 included in the Nasdaq-100 Index,
                                 respectively, for its own account. The Agent
                                 must close out any naked short position by
                                 purchasing the PERKS or individual stocks
                                 included in the Nasdaq-100 Index in the open
                                 market. A naked short position is more likely
                                 to be created if the Agent is concerned that
                                 there may be downward pressure on the price of
                                 the PERKS or the value of the Nasdaq-100 Index
                                 in the open market after pricing that could
                                 adversely affect investors who purchase in the
                                 offering. As an additional means of
                                 facilitating the offering, the Agent may bid
                                 for, and purchase, PERKS or individual stocks
                                 included in the Nasdaq-100 Index in the open
                                 market to stabilize the price of the PERKS.
                                 Any of these activities may raise or maintain
                                 the market price of the PERKS above
                                 independent market levels or prevent or retard
                                 a decline in the market price of the PERKS.
                                 The Agent is not required to engage in these
                                 activities, and may end any of these
                                 activities at any time. See "Use of Proceeds
                                 and Hedging" above.

License Agreement between
Nasdaq and MSDW...............   Nasdaq and MSDW have entered into a
                                 non-exclusive license agreement providing for
                                 the license to MSDW, and certain of its
                                 affiliated or subsidiary companies, in
                                 exchange for a fee, of the right to use the
                                 Nasdaq-100 Index(R), which is owned and
                                 published by Nasdaq, in connection with
                                 certain securities, including the PERKS.

                                 The license agreement between Nasdaq and MSDW
                                 provides that the following language must be
                                 set forth in this pricing supplement.


                                     PS-19
<PAGE>


                                 The PERKS are not sponsored, endorsed, sold or
                                 promoted by The Nasdaq Stock Market, Inc.
                                 (including its affiliates) (Nasdaq, with its
                                 affiliates, are referred to as the
                                 "Corporations"). The Corporations have not
                                 passed on the legality or suitability of, or
                                 the accuracy or adequacy of descriptions and
                                 disclosures relating to, the PERKS. The
                                 Corporations make no representations or
                                 warranty, express or implied, to the owners of
                                 the PERKS or any member of the public
                                 regarding the advisability of investing in
                                 securities generally or in the PERKS
                                 particularly, or the ability of the Nasdaq-100
                                 Index(R) to track general stock market
                                 performance. The Corporations' only
                                 relationship to us (the "Licensee") is in the
                                 licensing of the Nasdaq-100(R), Nasdaq-100
                                 Index(R), and Nasdaq(R) trademarks or service
                                 marks and certain trade names of the
                                 Corporations and the use of the Nasdaq-100
                                 Index(R) which is determined, composed and
                                 calculated by Nasdaq without regard to the
                                 Licensee or the PERKS. Nasdaq has no
                                 obligation to take the needs of the Licensee
                                 or the owners of the PERKS into consideration
                                 in determining, composing or calculating the
                                 Nasdaq-100 Index (R). The Corporations are not
                                 responsible for and have not participated in
                                 the determination of the timing, prices or
                                 quantities of the PERKS to be issued or in the
                                 determination or calculation of the equation
                                 by which the PERKS are to be converted into
                                 cash. The Corporations have no liability in
                                 connection with the administration, marketing
                                 or trading of the PERKS.

                                 THE CORPORATIONS DO NOT GUARANTEE THE ACCURACY
                                 AND/OR UNINTERRUPTED CALCULATION OF THE
                                 NASDAQ-100 INDEX(R) OR ANY DATA INCLUDED
                                 THEREIN. THE CORPORATIONS MAKE NO WARRANTY,
                                 EXPRESS OR IMPLIED, AS TO RESULTS TO BE
                                 OBTAINED BY THE LICENSEE, OWNERS OF THE PERKS,
                                 OR ANY OTHER PERSON OR ENTITY FROM THE USE OF
                                 THE NASDAQ-100 INDEX(R) OR ANY DATA INCLUDED
                                 THEREIN. THE CORPORATIONS MAKE NO EXPRESS OR
                                 IMPLIED WARRANTIES AND EXPRESSLY DISCLAIM ALL
                                 WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
                                 PARTICULAR PURPOSE OR USE WITH RESPECT TO THE
                                 NASDAQ-100 INDEX(R) OR ANY DATA INCLUDED
                                 THEREIN. WITHOUT LIMITING ANY OF THE FORGOING,
                                 IN NO EVENT SHALL THE CORPORATIONS HAVE ANY
                                 LIABILITY FOR ANY LOST PROFITS OR SPECIAL,
                                 INCIDENTAL, PUNITIVE, INDIRECT, OR
                                 CONSEQUENTIAL DAMAGES, EVEN IF NOTIFIED OF THE
                                 POSSIBILITY OF SUCH DAMAGES.

ERISA Matters for Pension Plans
and Insurance Companies.......   Each fiduciary of a pension, profit-sharing
                                 or other employee benefit plan subject to the
                                 Employee Retirement Income Security Act of
                                 1974, as amended ("ERISA") (a "Plan"), should
                                 consider the fiduciary standards of ERISA in
                                 the context of the Plan's particular
                                 circumstances before authorizing an
                                 investment in the PERKS. Accordingly, among
                                 other factors, the fiduciary should consider
                                 whether the investment would satisfy the
                                 prudence and diversification requirements of
                                 ERISA and would be consistent with the
                                 documents and instruments governing the Plan.


                                     PS-20
<PAGE>


                                 In addition, we and certain of our
                                 subsidiaries and affiliates, including MS &
                                 Co. and Dean Witter Reynolds Inc. ("DWR"), are
                                 each to be considered a "party in interest"
                                 within the meaning of ERISA, or a
                                 "disqualified person" within the meaning of
                                 the Internal Revenue Code of 1986, as amended
                                 (the "Code") with respect to many Plans.
                                 Prohibited transactions within the meaning of
                                 ERISA or the Code would likely arise, for
                                 example, if the PERKS are acquired by or with
                                 the assets of a Plan with respect to which MS
                                 & Co., DWR or any of their affiliates is a
                                 service provider, unless the PERKS are
                                 acquired pursuant to an exemption from the
                                 "prohibited transaction" rules. A violation of
                                 these "prohibited transaction" rules may
                                 result in an excise tax or other liabilities
                                 under ERISA and/or Section 4975 of the Code
                                 for such persons, unless exemptive relief is
                                 available under an applicable statutory or
                                 administrative exemption.

                                 The U.S. Department of Labor has issued five
                                 prohibited transaction class exemptions
                                 ("PTCEs") that may provide exemptive relief
                                 for direct or indirect prohibited transactions
                                 resulting from the purchase or holding of the
                                 PERKS. Those class exemptions are PTCE 96-23
                                 (for certain transactions determined by
                                 in-house asset managers), PTCE 95-60 (for
                                 certain transactions involving insurance
                                 company general accounts), PTCE 91-38 (for
                                 certain transactions involving bank collective
                                 investment funds), PTCE 90-1 (for certain
                                 transactions involving insurance company
                                 separate accounts) and PTCE 84-14 (for certain
                                 transactions determined by independent
                                 qualified asset managers).

                                 Because we are considered a party in interest
                                 with respect to many Plans, the PERKS may not
                                 be purchased or held by any Plan, any entity
                                 whose underlying assets include "plan assets"
                                 by reason of any Plan's investment in the
                                 entity (a "Plan Asset Entity") or any person
                                 investing "plan assets" of any Plan, unless
                                 such purchaser or holder is eligible for
                                 exemptive relief, including relief available
                                 under PTCE 96-23, 95-60, 91-38, 90-1 or 84-14
                                 or such purchase and holding is otherwise not
                                 prohibited. Any purchaser, including any
                                 fiduciary purchasing on behalf of a Plan, or
                                 holder of the PERKS will be deemed to have
                                 represented, in its corporate and fiduciary
                                 capacity, by its purchase and holding thereof
                                 that it either (a) is not a Plan or a Plan
                                 Asset Entity and is not purchasing such
                                 securities on behalf of or with "plan assets"
                                 of any Plan or (b) is eligible for exemptive
                                 relief or such purchase or holding is not
                                 prohibited by ERISA or Section 4975 of the
                                 Code.

                                 Under ERISA, assets of a Plan may include
                                 assets held in the general account of an
                                 insurance company which has issued an
                                 insurance policy to such Plan or assets of an
                                 entity in which the Plan has invested. In
                                 addition to considering the consequences of
                                 holding the PERKS, employee benefit plans
                                 subject to ERISA (or insurance companies
                                 deemed to be investing ERISA plan assets)
                                 purchasing the PERKS should also consider the
                                 possible implications of owning the Nasdaq-100
                                 Index. Accordingly, insurance company general
                                 accounts that include assets of a Plan must
                                 ensure that one of the foregoing exemptions is
                                 available. Due to the complexity of these
                                 rules and the penalties that may be imposed
                                 upon persons involved in non-exempt prohibited
                                 transactions, it is particularly important
                                 that fiduciaries or other


                                     PS-21
<PAGE>


                                 persons considering purchasing the PERKS on
                                 behalf of or with "plan assets" of any Plan
                                 consult with their counsel regarding the
                                 availability of exemptive relief under PTCE
                                 96-23, 95-60, 91-38, 90-1 or 84-14.

                                 Purchasers of the PERKS have exclusive
                                 responsibility for ensuring that their
                                 purchase and holding of the PERKS and the
                                 Nasdaq-100 Index do not violate the
                                 prohibited transaction rules of ERISA or the
                                 Code.

United States Federal Taxation   The following summary is based on the advice
                                 of Davis Polk & Wardwell, our special tax
                                 counsel ("Tax Counsel"), and is a general
                                 discussion of the principal potential U.S.
                                 federal income tax consequences to initial
                                 holders of the PERKS purchasing the PERKS at
                                 the Issue Price, who will hold the PERKS as
                                 capital assets within the meaning of Section
                                 1221 of the Code. This summary is based on
                                 the Code, administrative pronouncements,
                                 judicial decisions and currently effective
                                 and proposed Treasury Regulations, changes to
                                 any of which subsequent to the date of this
                                 pricing supplement may affect the tax
                                 consequences described herein. This summary
                                 does not address all aspects of U.S. federal
                                 income taxation that may be relevant to a
                                 particular holder in light of its individual
                                 circumstances or as to certain types of
                                 holders subject to special treatment under
                                 the U.S. federal income tax laws (e.g.,
                                 certain financial institutions, tax-exempt
                                 organizations, dealers in options or
                                 securities, or persons who hold a PERKS as a
                                 part of a hedging transaction, straddle,
                                 conversion or other integrated transaction).
                                 As the law applicable to the U.S. federal
                                 income taxation of instruments such as the
                                 PERKS is technical and complex, the
                                 discussion below necessarily represents only a
                                 general summary. Moreover, the effect of any
                                 applicable state, local or foreign tax laws
                                 is not discussed.

                                 General

                                 Pursuant to the terms of the PERKS, we and
                                 every holder of the PERKS agree (in the
                                 absence of an administrative determination or
                                 judicial ruling to the contrary) to
                                 characterize the PERKS for all tax purposes
                                 as prepaid cash settlement forward contracts
                                 with respect to the Nasdaq-100 Index which
                                 entitle the holders to receive (i) a
                                 semi-annual payment during the term of the
                                 PERKS and (ii) a cash amount at maturity
                                 which is based on the final index value of
                                 the Nasdaq-100 Index, subject to a maximum
                                 payment of $      per PERKS. The treatment
                                 of the PERKS described above is not, however,
                                 binding on the IRS or the courts. No
                                 statutory, judicial or administrative
                                 authority directly addresses the
                                 characterization of the PERKS or instruments
                                 similar to the PERKS for U.S. federal income
                                 tax purposes, and no ruling is being
                                 requested from the IRS with respect to the
                                 PERKS. Due to the absence of authorities
                                 that directly address instruments that are
                                 similar to the PERKS, Tax Counsel is unable
                                 to render an opinion as to the proper U.S.
                                 federal income tax characterization of the
                                 PERKS. As a result, significant aspects of
                                 the U.S. federal income tax consequences of
                                 an investment in the PERKS are not certain,
                                 and no assurance can be given that the IRS or
                                 the courts will agree with the
                                 characterization described herein.
                                 Accordingly, you are urged to consult your


                                     PS-22
<PAGE>


                                 tax advisor regarding the U.S. federal income
                                 tax consequences of an investment in the
                                 PERKS (including alternative
                                 characterizations of the PERKS) and with
                                 respect to any tax consequences arising under
                                 the laws of any state, local or foreign
                                 taxing jurisdiction.  Unless otherwise
                                 stated, the following discussion is based on
                                 the treatment as described above.

                                 U.S. Holders

                                 As used herein, the term "U.S. Holder" means
                                 an owner of a PERKS that for U.S. federal
                                 income tax purposes is:

                                 o      (i) a citizen or resident of the United
                                        States,

                                 o      (ii) a corporation created or organized
                                        under the laws of the United States or
                                        any political subdivision thereof, or

                                 o      (iii) an estate or trust the income of
                                        which is subject to United States
                                        federal income taxation regardless of
                                        its source.

                                 Tax Treatment of the PERKS

                                 Assuming the characterization of the PERKS as
                                 set forth above, Tax Counsel believes that
                                 the following U.S. federal income tax
                                 consequences should result.

                                 Semi-Annual Payments. Although it is not
                                 entirely free from doubt, we intend to take
                                 the position that the semi-annual payments on
                                 the PERKS are payments of ordinary income to
                                 U.S. Holders.

                                 Tax Basis. A U.S. Holder's tax basis in the
                                 PERKS will equal the amount paid by the U.S.
                                 Holder to acquire the PERKS.

                                 Settlement of the Prepaid Forward Contract.
                                 Upon the receipt of cash at maturity of the
                                 PERKS, a U.S. Holder will recognize gain or
                                 loss. The amount of such gain or loss will be
                                 the extent to which the amount of the cash
                                 received differs from the U.S. Holder's basis
                                 in the PERKS. Any such gain or loss will
                                 generally be long-term capital gain or loss,
                                 as the case may be.

                                 Sale or Exchange of the PERKS. Upon a sale or
                                 exchange of a PERKS prior to the maturity of
                                 the PERKS, a U.S. Holder will generally
                                 recognize capital gain or loss equal to the
                                 difference between the amount realized on such
                                 sale or exchange and such U.S. Holder's tax
                                 basis in the PERKS so sold or exchanged.
                                 Capital gain or loss will generally be
                                 long-term capital gain or loss if the U.S.
                                 Holder held the PERKS for more than one year
                                 at the time of disposition.

                                 Possible Alternative Tax Treatments of an
                                 Investment in the PERKS

                                 Due to the absence of authorities that
                                 directly address the proper characterization
                                 of the PERKS, no assurance can be given that
                                 the IRS will accept, or that a court will
                                 uphold, the characterization and tax treatment
                                 described above. In particular, the IRS could


                                     PS-23
<PAGE>


                                 seek to analyze the U.S. federal income tax
                                 consequences of owning PERKS under Treasury
                                 regulations governing contingent payment debt
                                 instruments (the "Contingent Payment
                                 Regulations").

                                 If the IRS were successful in asserting that
                                 the Contingent Payment Regulations applied to
                                 the PERKS, the timing and character of income
                                 thereon would be significantly affected. Among
                                 other things, a U.S. Holder would be required
                                 to accrue original issue discount on the PERKS
                                 every year at a "comparable yield" for us,
                                 determined at the time of issuance of the
                                 PERKS, in an amount that would greatly exceed
                                 the semi-annual payments which a U.S. Holder
                                 will receive. Furthermore, any gain realized
                                 at maturity or upon sale or other disposition
                                 of the PERKS would generally be treated as
                                 ordinary income, and any loss realized at
                                 maturity would be treated ordinary loss to the
                                 extent of U.S. Holder's prior accruals of
                                 original issue discount and capital loss
                                 thereafter.

                                 Even if the Contingent Payment Regulations do
                                 not apply to the PERKS, other alternative
                                 federal income tax characterizations or
                                 treatments of the PERKS are also possible, and
                                 if applied could also affect the timing and
                                 the character of the income or loss with
                                 respect to the PERKS. It is possible, for
                                 example, that a PERKS could be treated as a
                                 unit consisting of a loan and a forward
                                 contract, in which case a U.S. Holder would be
                                 required to accrue interest income or original
                                 issue discount on a current basis during the
                                 period in which the U.S. Holder held the PERKS
                                 at a rate that would greatly exceed the
                                 semi-annual payments which a U.S. Holder will
                                 receive. Accordingly, prospective purchasers
                                 are urged to consult their tax advisors
                                 regarding the U.S. federal income tax
                                 consequences of an investment in the PERKS.

                                 Backup Withholding and Information Reporting

                                 A U.S. Holder of a PERKS may be subject to
                                 information reporting and to backup
                                 withholding at a rate of 31 percent of the
                                 amounts paid to the U.S. Holder, unless such
                                 U.S. Holder provides proof of an applicable
                                 exemption or a correct taxpayer identification
                                 number, and otherwise complies with
                                 applicable requirements of the backup
                                 withholding rules.  The amounts withheld
                                 under the backup withholding rules are not an
                                 additional tax and may be refunded, or
                                 credited against the U.S. Holder's U.S.
                                 federal income tax liability, provided the
                                 required information is furnished to the IRS.


                                     PS-24


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