MORGAN STANLEY DEAN WITTER & CO
424B3, 2000-06-06
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
WE 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 May 30, 2000


PROSPECTUS Dated May 18, 2000                        Pricing Supplement No. 5 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

                            -----------------------

                       10% Reset PERQS due June 28, 2002
                          Mandatorily Exchangeable For
               Shares of Common Stock of JDS UNIPHASE CORPORATION

     Reset Performance Equity-linked Redemption Quarterly-pay SecuritiesSM
                               ("Reset PERQS(SM)")

The Reset PERQS will pay 10% interest per year but do not guarantee any return
of principal at maturity. Instead the Reset PERQS will pay at maturity a number
of shares of JDS Uniphase common stock based on the closing prices of JDS
Uniphase common stock in June of 2001 and at maturity, in each case subject to
a cap price.

o    The principal amount and issue price of each Reset PERQS is $    , which is
     one-fifth of the closing price of JDS Uniphase common stock on the day we
     offer the Reset PERQS for initial sale to the public.

o    We will pay 10% interest (equivalent to $            per year) on the
     $           principal amount of  each Reset PERQS.  Interest will be paid
     quarterly, beginning September 28, 2000.

o    At maturity you will receive shares of JDS Uniphase common stock in
     exchange for each Reset PERQS at an exchange ratio. The initial exchange
     ratio is one-fifth of a share of JDS Uniphase common stock per Reset
     PERQS. However, if the price of JDS Uniphase common stock appreciates
     above the first year cap price for June 29, 2001 or the second year cap
     price for June 26, 2002, the exchange ratio will be adjusted downward, and
     you will receive an amount of JDS Uniphase common stock per Reset PERQS
     that is less than one-fifth of a share.

o    The first year cap price is $    , or    % of the closing price of JDS
     Uniphase common stock on the day we offer the Reset PERQS for initial sale
     to the public. If on June 29, 2001, the price of JDS Uniphase common stock
     is higher than the closing price of JDS Uniphase common stock on the day
     we offer the Reset PERQS for initial sale to the public, we will raise the
     cap price to    % of the closing price of JDS Uniphase common stock on June
     29, 2001. Otherwise the cap price will remain unchanged in the second
     year. The maximum you can receive at maturity is JDS Uniphase common stock
     worth $      per Reset PERQS.

o    Investing in Reset PERQS is not equivalent to investing in JDS Uniphase
     common stock.

o    JDS Uniphase Corporation is not involved in this offering of Reset PERQS
     in any way and will have no financial obligation with respect to the Reset
     PERQS.

o    We will apply to list the Reset PERQS to trade under the proposed symbol
     "RPJ" on the American Stock Exchange LLC.

You should read the more detailed description of the Reset PERQS in this
pricing supplement. In particular, you should review and understand the
descriptions in"Summary of Pricing Supplement" and "Description of Reset
PERQS." "Performance Equity-linked Redemption Quarterly-pay Securities" and
"PERQS" are our service marks.

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

                          ---------------------------

                          PRICE $     PER RESET PERQS

                          ---------------------------

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

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

If you purchase at least 100,000 Reset PERQS 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 Reset PERQS (98.25% of the Issue Price). In that case, the
underwriting discounts and commissions will be $ per Reset PERQS.


                           MORGAN STANLEY DEAN WITTER



<PAGE>



                      (This page intentionally left blank)


                                     PS-2

<PAGE>


                         SUMMARY OF PRICING SUPPLEMENT

     The following summary describes the Reset PERQS 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 Reset PERQS offered are medium-term debt securities of Morgan Stanley
Dean Witter & Co. The return on the Reset PERQS is linked to the performance of
JDS Uniphase Corporation common stock, which we refer to as JDS Uniphase Stock.
The Reset PERQS also provide fixed quarterly payments at an annual rate of 10%
based on the principal amount of each Reset PERQS. Unlike ordinary debt
securities, Reset PERQS do not guarantee the return of principal at maturity.
Instead the Reset PERQS pay a number of shares of JDS Uniphase Stock at
maturity based on the performance of this stock, either up or down, subject to
a maximum value in each year. We may not redeem the Reset PERQS prior to
maturity.


Each Reset PERQS              We, Morgan Stanley Dean Witter & Co., are offering
costs $                       10% Reset Performance Equity-linked Redemption
                              Quarterly-pay Securities(sm) due June 28, 2002,
                              which we refer to as the Reset PERQS(sm). The
                              principal amount and issue price of each Reset
                              PERQS is $ , which is one-fifth of the closing
                              price of JDS Uniphase Stock on the day we offer
                              the Reset PERQS for initial sale to the public.

No guaranteed                 Unlike ordinary debt securities, the Reset PERQS
return of principal           do not guarantee any return of principal at
                              maturity. Instead the Reset PERQS will pay an
                              amount of JDS Uniphase Stock based on the market
                              price of JDS Uniphase Stock, either up or down,
                              on June 29, 2001 and at maturity, in each case
                              subject to a cap price. Investing in Reset PERQS
                              is not equivalent to investing in JDS Uniphase
                              Stock.

10% interest on the           We will pay interest on the Reset PERQS, at the
principal amount              rate of 10% of the per principal amount year,
                              quarterly on each March 28, June 28, September 28
                              and December 28, beginning September 28, 2000.
                              The interest rate we pay on the Reset PERQS is
                              more than the current dividend rate on the JDS
                              Uniphase Stock. The Reset PERQS will mature on
                              June 28, 2002.

Your appreciation             The appreciation potential of each Reset PERQS is
potential is capped           limited in each year by the cap price. The cap
                              price through June 29, 2001 is $       , or   % of
                              the closing price of JDS Uniphase Stock on the day
                              we offer the Reset PERQS for initial sale to the
                              public ("First Year Cap Price"). The cap price
                              thereafter until maturity ("Second Year Cap
                              Price") will be the higher of   % of the closing
                              price of JDS Uniphase Stock on June 29, 2001 and
                              the First Year Cap Price. The maximum you can
                              receive at maturity is JDS Uniphase Stock worth $
                              per Reset PERQS.

Payout at Maturity            At maturity, for each $ principal amount of Reset
                              PERQS you hold, we will give to you a number of
                              shares of JDS Uniphase Stock equal to the
                              exchange ratio. The initial exchange ratio is
                              one-fifth of a share of JDS Uniphase Stock per
                              Reset PERQS and may be adjusted as follows:

                                             First Year Adjustment

                              The exchange ratio will be adjusted downward if
                              the market price of JDS Uniphase Stock exceeds
                              the First Year Cap Price on June 29, 2001.

                              The adjusted exchange ratio will be calculated as
                              follows:

<TABLE>
<S>                           <C>        <C>       <C>

                                New      Initial
                              Exchange = Exchange x         First Year Cap Price
                                Ratio     Ratio     ----------------------------------------------
                                                    JDS Uniphase Stock closing price on June 29, 2001
</TABLE>


                                   If the market price of JDS Uniphase Stock on
                                   June 29, 2001 is the same as or less than
                                   the First Year Cap Price, we will not adjust
                                   the exchange ratio at that time.


                                     PS-3

<PAGE>




                                           Second Year Adjustment

                                   The exchange ratio may be adjusted downward
                                   again at maturity, but only if the market
                                   price of JDS Uniphase Stock at maturity
                                   exceeds the Second Year Cap Price. The final
                                   exchange ratio will then be calculated as
                                   follows:

<TABLE>
<S>                           <C>        <C>        <C>

                              Final      Existing           Second Year Cap Price
                              Exchange = Exchange x --------------------------------------------
                              Ratio      Ratio      JDS Uniphase Stock closing price at maturity
</TABLE>


                                   If the market price of JDS Uniphase Stock
                                   at maturity is the same as or less than
                                   the Second Year Cap Price, we will not
                                   adjust the Exchange Ratio at maturity.

                              On the next page, we have provided a table titled
                              "Hypothetical Payouts on the Reset PERQS." The
                              table demonstrates the effect of these
                              adjustments to the exchange ratio under a variety
                              of hypothetical price scenarios. You should
                              examine the table for examples of how the payout
                              on the Reset PERQS could be affected under these
                              or other potential price scenarios. This table
                              does not show every situation that may occur.

                              You can review the prices of JDS Uniphase Stock
                              for the last three years in the "Historical
                              Information" section of this pricing supplement.

                              During the life of the Reset PERQS, Morgan
                              Stanley & Co. Incorporated or its successors,
                              which we refer to as MS & Co., acting as
                              calculation agent, will also make adjustments to
                              the effective exchange ratio to reflect the
                              occurrence of certain corporate events that could
                              affect the market price of JDS Uniphase Stock.
                              You should read about these adjustments in the
                              sections called "Description of Reset
                              PERQS--Exchange at Maturity," "--Exchange Factor"
                              and "--Antidilution Adjustments."

The Calculation Agent         We have appointed 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 exchange ratio and the cap
                              prices and calculate the amount of JDS Uniphase
                              Stock that you will receive at maturity.

No affiliation with           JDS Uniphase Corporation is not an affiliate of
JDS Uniphase Corporation      ours and is not involved with this offering in any
                              way. The obligations represented by the Reset
                              PERQS are obligations of Morgan Stanley Dean
                              Witter & Co. and not of JDS Uniphase Corporation.

More information on           The Reset PERQS are senior notes issued as part of
the Reset PERQS               out Series C medium-term note program. You can
                              find a general description of our Series C
                              medium-term note program in the 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 Reset
                              PERQS, including the specific mechanics and
                              timing of the exchange ratio adjustments, you
                              should read the "Description of Reset PERQS"
                              section in this pricing supplement. You should
                              also read about some of the risks involved in
                              investing in Reset PERQS in the section called
                              "Risk Factors." The tax and accounting treatment
                              of investments in equity- linked notes such as
                              the Reset PERQS 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 Reset PERQS.

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).


                                     PS-4

<PAGE>


                    HYPOTHETICAL PAYOUTS ON THE RESET PERQS

     For each Reset PERQS, the following table illustrates, for a range of
First Year Closing Prices and Maturity Prices, any adjustments we would make to
the Exchange Ratio and the Second Year Cap Price and the resulting payout at
maturity and total return on each Reset PERQS. The following assumptions were
made:

<TABLE>
<S>     <C>                                  <C>

        o  Initial Price of Reset PERQS:      $16.00
        o  Initial JDS Uniphase Stock Price:  $80.00
        o  First Year Cap Price:              152.50% of the Initial JDS Uniphase Stock Price
        o  Second Year Cap Price:             Greater of (x) 152.50% of the First Year Closing Price and (y) First Year Cap Price
        o  Interest Rate:                     10% per year
        o  Maturity:                          24 months
</TABLE>


<TABLE>

                                                                                                                Reset
                                                                                                                PERQS
                                                                                                               Payout at
                                                                                                                Maturity   Reset
                  Initial                                                                                       Based on   PERQS
        Initial    JDS                                 First                                                     on JDS    Payout at
         Price    Uniphase    Inital                    Year     5/30/01      Second                 Exchange   Uniphase   Maturity
        of Reset   Stock     Exchange   First Year    Closing    Exchange       Year      Maturity   Ratio at    Stock     plus 10%
Number   PERQS     Price      Ratio     Cap Price     Price(1)    Ratio      Cap Price    Price(1)   Maturity    Price     Coupon
------  --------  --------   --------   ----------   ---------   --------    ---------   ---------   --------  ---------   ---------
<S>     <C>       <C>        <C>        <C>          <C>         <C>         <C>         <C>         <C>       <C>         <C>

  1     $16.00    $80.00     0.20000     $122.00       $60.00     0.20000    $122.0000    $40.0000   0.20000      $8.00    $11.29
  2     $16.00    $80.00     0.20000     $122.00       $60.00     0.20000    $122.0000   $100.0000   0.20000     $20.00    $23.29
  3     $16.00    $80.00     0.20000     $122.00       $60.00     0.20000    $122.0000   $140.0000   0.17429     $24.40    $27.69
  4     $16.00    $80.00     0.20000     $122.00      $110.00     0.20000    $167.7500    $70.0000   0.20000     $14.00    $17.29
  5     $16.00    $80.00     0.20000     $122.00      $110.00     0.20000    $167.7500   $140.0000   0.20000     $28.00    $31.29
  6     $16.00    $80.00     0.20000     $122.00      $110.00     0.20000    $167.7500   $180.0000   0.18639     $33.55    $36.84
  7     $16.00    $80.00     0.20000     $122.00      $160.00     0.15250    $244.0000    $70.0000   0.15250     $10.68    $13.97
  8     $16.00    $80.00     0.20000     $122.00      $160.00     0.15250    $244.0000   $180.0000   0.15250     $27.45    $30.74
  9     $16.00    $80.00     0.20000     $122.00      $160.00     0.15250    $244.0000   $245.0000   0.15188     $37.21    $40.50
  10    $16.00    $80.00     0.20000     $122.00      $122.00     0.20000    $186.0500   $186.0500   0.20000     $37.21    $40.50
                                            ^                                    ^                                  ^
                                         152.50%                           Greater of (x)                 Maturity Price times
                                       of Initial                         152.50% of First                  Adjusted Exchange
                                           JDS                              Year Closing                         Ratio
                                        Uniphase                        Price and (y) First
                                       Stock Price                         Year Cap Price
</TABLE>


     The above table illustrates an important feature of the Reset PERQS - the
payout at maturity is not determined merely by the price of JDS Uniphase Stock
at maturity, but will depend on the timing and magnitude of changes in the JDS
Uniphase Stock price. For example, in both the fourth and seventh illustrations
shown above, the Maturity Price is $70.00, but in the seventh illustration the
Payout at Maturity is $13.97 compared to $17.29 in the fourth illustration. The
difference in the seventh illustration arises because the First Year Closing
Price exceeded the First Year Cap Price, resulting in a downward adjustment in
the Second Year Exchange Ratio. Similarly, in both the ninth and tenth
illustrations, the Payout at Maturity is $40.50, but in the ninth illustration,
the Maturity Price had to equal or exceed $245.00 to produce that payout, but
in the tenth illustration, a Maturity Price of only $186.05 was required.

-------------------

1.   The First Year Closing Price and the Maturity Price do not include any
     dividend payments that may have been paid to holders of JDS Uniphase Stock.


                                     PS-5

<PAGE>

                                  RISK FACTORS

     The Reset PERQS are not secured debt and are riskier than ordinary debt
securities. Because the return to investors is linked to the performance of JDS
Uniphase Stock, there is no guaranteed return of principal. Investing in Reset
PERQS is not equivalent to investing directly in JDS Uniphase Stock. This
section describes the most significant risks relating to the Reset PERQS. You
should carefully consider whether the Reset PERQS are suited to your particular
circumstances before you decide to purchase them.

Reset PERQS Are Not           The Reset PERQS combine features of equity and
Ordinary Senior Notes --      debt. The terms of the Reset PERQS differ from
No guaranteed return of       those of ordinary debt securities in that we will
principal                     not pay you a fixed amount at maturity. Our payout
                              to you at maturity will be a number of shares of
                              JDS Uniphase Stock based on the market price of
                              JDS Uniphase Stock on June 29, 2001 and at
                              maturity. If the final market price of JDS
                              Uniphase Stock at maturity is either less than
                              today's market price or not sufficiently above
                              today's market price to compensate for a downward
                              adjustment of the exchange ratio, if any, at June
                              29, 2001, we will pay you an amount of JDS
                              Uniphase Stock with a value less than the
                              principal amount of the Reset PERQS. See
                              "Hypothetical Payouts on the Reset PERQS" above.

Your Appreciation             The appreciation potential of the Reset PERQS is
Potential Is Limited          limited because of the cap prices. Even though the
                              $       issue price of one Reset PERQS is equal to
                              today's market price of one share of JDS Uniphase
                              Stock multiplied by the initial exchange ratio,
                              you may receive a lesser fractional amount of JDS
                              Uniphase Stock per Reset PERQS at maturity if the
                              initial exchange ratio of one-fifth of a share
                              has been adjusted downwards. If the price of JDS
                              Uniphase Stock appreciates above both the cap
                              price for June 29, 2001 and the cap price for
                              June 26, 2002, the initial exchange ratio of
                              one-fifth of a share of JDS Uniphase Stock per
                              Reset PERQS will be reduced twice.

                              The exchange ratio and the final market price of
                              JDS Uniphase Stock at maturity will be determined
                              on June 26, 2002, which is two trading days prior
                              to maturity of the Reset PERQS. If the price of
                              JDS Uniphase Stock is lower on the actual
                              maturity date than it was on June 26, 2002, the
                              value of any JDS Uniphase Stock you receive will
                              be less. Under no circumstances will you receive
                              an amount of JDS Uniphase Stock for each Reset
                              PERQS worth more than $ as of such second
                              scheduled trading day prior to maturity.

Secondary Trading             There may be little or no secondary market for the
May Be Limited                Reset PERQS. Although we will apply to list the
                              Reset PERQS on the American Stock Exchange LLC,
                              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 Reset PERQS but is not required
                              to do so.

Market Price of the Reset     Several factors, many of which are beyond our
PERQS Influenced by Many      control, will influence the value of the Reset
Unpredictable Factors         PERQS.  We expect that generally the market price
                              of the JDS Uniphase Stock on any day will affect
                              the value of the Reset PERQS more than any other
                              single factor. Because adjustments to the
                              exchange ratio for the Reset PERQS are tied to
                              the closing stock prices on two specific days,
                              however, the Reset PERQS may trade differently
                              from the underlying stock. Other factors that may
                              influence the value of the Reset PERQS include:

                              o    the volatility (frequency and magnitude of
                                   changes in price) of the JDS Uniphase Stock

                              o    the dividend rate on JDS Uniphase Stock

                                     PS-6

<PAGE>


                              o    economic, financial, political and
                                   regulatory or judicial events that
                                   affect stock markets generally and which
                                   may affect the market price of JDS
                                   Uniphase Stock

                              o    interest and yield rates in the market

                              o    the time remaining to the maturity of the
                                   Reset PERQS

                              o    our creditworthiness

                              Some or all of these factors will influence the
                              price you will receive if you sell your Reset
                              PERQS prior to maturity. For example, you may
                              have to sell your Reset PERQS at a substantial
                              discount from the principal amount if the market
                              price of the JDS Uniphase Stock is at, below, or
                              not sufficiently above the initial market price.

                              You cannot predict the future performance of JDS
                              Uniphase Stock based on its historical
                              performance. The price of JDS Uniphase Stock may
                              decrease so that you will receive at maturity
                              shares of JDS Uniphase Stock worth less than the
                              principal amount of the Reset PERQS. We cannot
                              guarantee that the price of JDS Uniphase Stock
                              will increase so that you will receive at
                              maturity an amount in excess of the principal
                              amount of the Reset PERQS.

No Affiliation with           We are not affiliated with JDS Uniphase
JDS Uniphase Corporation      Corporation. Although we do not have any
                              non-public information about JDS Uniphase as of
                              the date of this pricing supplement, we or our
                              subsidiaries may presently or from time to time
                              engage in business with JDS Uniphase, including
                              extending loans to, or making equity investments
                              in, JDS Uniphase or providing advisory services
                              to JDS Uniphase, including merger and acquisition
                              advisory services. Moreover, we have no ability
                              to control or predict the actions of JDS
                              Uniphase, including any corporate actions of the
                              type that would require the calculation agent to
                              adjust the payout to you at maturity. JDS
                              Uniphase is not involved in the offering of the
                              Reset PERQS in any way and has no obligation to
                              consider your interest as an owner of Reset PERQS
                              in taking any corporate actions that might affect
                              the value of your Reset PERQS. None of the money
                              you pay for the Reset PERQS will go to JDS
                              Uniphase.

You Have No                   As an owner of Reset PERQS, you will not have
Shareholder Rights            voting rights or rights to receive dividends or
                              other distributions or any other rights with
                              respect to the JDS Uniphase Stock.

Limited Antidilution          MS & Co., as calculation agent, will adjust the
Adjustments                   amount payable at maturity for certain events
                              affecting the JDS Uniphase Stock, such as stock
                              splits and stock dividends, and certain other
                              corporate actions involving JDS Uniphase, such as
                              mergers. However, the calculation agent is not
                              required to make an adjustment for every
                              corporate event that can affect the JDS Uniphase
                              Stock. For example, the calculation agent is not
                              required to make any adjustments if JDS Uniphase
                              or anyone else makes a partial tender or partial
                              exchange offer for the JDS Uniphase Stock. If an
                              event occurs that does not require the
                              calculation agent to adjust the amount of JDS
                              Uniphase Stock payable at maturity, the market
                              price of the Reset PERQS may be materially and
                              adversely affected.


                                     PS-7




<PAGE>




Potential Conflicts of        As calculation agent, MS & Co. will calculate the
Interest between You and the  payout to you at maturity of the Reset PERQS.  MS
                              Calculation Agent & Co. and other affiliates may
                              also carry out hedging activities related to
                              Reset PERQS or to other instruments, including
                              trading in JDS Uniphase Stock as well as in other
                              instruments related to JDS Uniphase Stock. MS &
                              Co. and some of our other subsidiaries also trade
                              JDS Uniphase Stock and other financial
                              instruments related to JDS Uniphase Stock on a
                              regular basis as part of their general broker
                              dealer and other businesses. Any of these
                              activities could influence MS & Co.'s
                              determination of adjustments made to Reset PERQS
                              and any such trading activity could potentially
                              affect the price of JDS Uniphase Stock and,
                              accordingly, could affect your payout on the
                              Reset PERQS.

Tax Treatment                 You should also consider the tax consequences of
                              investing in the Reset PERQS. There is no direct
                              legal authority as to the proper tax treatment of
                              the Reset PERQS, and therefore significant
                              aspects of the tax treatment of the Reset PERQS
                              are uncertain. We do not plan to request a ruling
                              from the Internal Revenue Service ("IRS")
                              regarding the tax treatment of the Reset PERQS,
                              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
                              Reset PERQS--United States Federal Income
                              Taxation" in this pricing supplement.


                                     PS-8

<PAGE>


                           DESCRIPTION OF RESET PERQS

Terms not defined herein have the meanings given to such terms in the
accompanying prospectus supplement. The term "Reset PERQS" refers to each $
principal amount of our 10% Reset PERQS due June 28, 2002, Mandatorily
Exchangeable For Shares of Common Stock of JDS Uniphase Corporation. In this
pricing supplement, the terms "MSDW," "we," "us," and "our" refer to Morgan
Stanley Dean Witter & Co.

Principal Amount..............     $25,000,000

Maturity Date.................     June 28, 2002

Interest Rate.................     10% per annum (equivalent to $      per annum
                                   per Reset PERQS)

Interest Payment Dates........     Each March 28, June 28, September 28 and
                                   December 28, beginning September 28, 2000.

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

Issue Price...................     $       per Reset PERQS

Initial JDS Uniphase Stock
  Price.......................     $

Original Issue Date
  (Settlement Date)...........     June      , 2000

CUSIP.........................     61744Y769

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

First Year Cap Price..........     $         (      % of the Initial JDS
                                   Uniphase Stock Price)

First Year Determination Date.     June 29, 2001 (or if such date is not a
                                   Trading Day on which no Market Disruption
                                   Event occurs, the immediately succeeding
                                   Trading Day on which no Market Disruption
                                   Event occurs).

First Year Closing Price......     First Year Closing Price means the product of
                                   (i) the Market Price of one share of JDS
                                   Uniphase Stock and (ii) the Exchange Factor,
                                   each determined as of the First Year
                                   Determination Date.

Second Year Cap Price.........     Second Year Cap Price means the greater of
                                   (x)        % of the First Year Closing Price
                                   and (y) the First Year Cap Price. See
                                   "Exchange at Maturity" below.

Maturity Price................     Maturity Price means the product of (i) the
                                   Market Price of one share of JDS Uniphase
                                   Stock and (ii) the Exchange Factor, each
                                   determined as of the second scheduled
                                   Trading Day immediately prior to maturity.

Exchange at Maturity..........     At maturity, upon delivery of each Reset
                                   PERQS to the Trustee, we will apply each $
                                   principal amount of such Reset PERQS as
                                   payment for a number of shares of JDS
                                   Uniphase Stock at the Exchange Ratio. The
                                   initial Exchange Ratio, initially set at
                                   0.20, is subject to adjustment on the First
                                   Year Determination Date and at maturity in
                                   order to cap the value of the JDS Uniphase
                                   Stock to be received upon delivery of the
                                   Reset PERQS at $ per Reset PERQS (  % of the
                                   Issue Price). Solely for purposes of
                                   adjustment upon the occurrence of certain
                                   corporate events, the number of shares


                                     PS-9

<PAGE>

                                   of JDS Uniphase Stock to be delivered at
                                   maturity will also be adjusted by an
                                   Exchange Factor, initially set at 1.0. See
                                   "Exchange Factor" and "Antidilution
                                   Adjustments" below.

                                   If the First Year Closing Price is less than
                                   or equal to the First Year Cap Price, no
                                   adjustment to the Exchange Ratio will be
                                   made at such time. If the First Year Closing
                                   Price exceeds the First Year Cap Price, the
                                   Exchange Ratio will be adjusted so that the
                                   new Exchange Ratio will equal the product of
                                   (i) the existing Exchange Ratio and (ii) a
                                   fraction the numerator of which will be the
                                   First Year Cap Price and the denominator of
                                   which will be the First Year Closing Price.
                                   In addition, on the First Year Determination
                                   Date, the Calculation Agent will establish
                                   the "Second Year Cap Price" that will be
                                   equal to the greater of (x)   % of the First
                                   Year Closing Price and (y) the First Year
                                   Cap Price. Notice of the Second Year Cap
                                   Price and of any such adjustment to the
                                   Exchange Ratio shall promptly be sent by
                                   first- class mail to The Depository Trust
                                   Company, New York, New York (the
                                   "Depositary"). If the Maturity Price is less
                                   than or equal to the Second Year Cap Price,
                                   no further adjustment to the Exchange Ratio
                                   will be made. If the Maturity Price exceeds
                                   the Second Year Cap Price, the then existing
                                   Exchange Ratio will be adjusted so that the
                                   final Exchange Ratio will equal the product
                                   of (i) the existing Exchange Ratio and (ii)
                                   a fraction the numerator of which will be
                                   the Second Year Cap Price and the
                                   denominator of which will be the Maturity
                                   Price. Please review each example in the
                                   table called "Hypothetical Payouts on the
                                   Reset PERQS" on PS-5.

                                   All calculations with respect to the
                                   Exchange Ratios for the Reset PERQS will be
                                   rounded to the nearest one
                                   hundred-thousandth, with five one-millionths
                                   rounded upwards (e.g., .876545 would be
                                   rounded to .87655); all calculations with
                                   respect to the Second Year Cap Price will be
                                   rounded to the nearest ten-thousandth, with
                                   five one-hundred- thousandths rounded
                                   upwards (e.g., $12.34567 would be rounded to
                                   $12.3457); and all dollar amounts related to
                                   payouts 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 Reset PERQS, of the
                                   amount of JDS Uniphase Stock to be delivered
                                   with respect to each $    principal amount of
                                   each Reset PERQS and (ii) deliver such
                                   shares of JDS Uniphase Stock (and cash in
                                   respect of interest and any fractional
                                   shares of JDS Uniphase Stock) to the Trustee
                                   for delivery to the holders. The Calculation
                                   Agent shall determine the Exchange Ratio
                                   applicable at the maturity of the Reset
                                   PERQS and calculate the Exchange Factor.

No Fractional Shares..........     Upon delivery of the Reset PERQS to the
                                   Trustee at maturity (including as a result
                                   of acceleration under the terms of the
                                   senior indenture), we will deliver the
                                   aggregate number of shares of JDS Uniphase
                                   Stock due with respect to all of such Reset
                                   PERQS, as described above, but we will pay
                                   cash in lieu of delivering any fractional
                                   share of JDS Uniphase Stock in an amount
                                   equal to the corresponding fractional Market
                                   Price of such fraction of a share of

                                     PS-10

<PAGE>

                                   JDS Uniphase Stock as determined by the
                                   Calculation Agent as of the second scheduled
                                   Trading Day prior to maturity of the Reset
                                   PERQS.

Exchange Factor...............     The Exchange Factor will be set initially at
                                   1.0, but will be subject to adjustment upon
                                   the occurrence of certain corporate events
                                   affecting the JDS Uniphase Stock through and
                                   including the second scheduled Trading Day
                                   immediately prior to maturity. See
                                   "Antidilution Adjustments" below.

Market Price..................     If JDS Uniphase Stock (or any other security
                                   for which a Market Price must be determined)
                                   is listed on a national securities exchange,
                                   is a security of The Nasdaq National Market
                                   or is included in the OTC Bulletin Board
                                   Service ("OTC Bulletin Board") operated by
                                   the National Association of Securities
                                   Dealers, Inc. (the "NASD"), the Market Price
                                   for one share of JDS Uniphase Stock (or one
                                   unit of any such other security) on any
                                   Trading Day means (i) the last reported sale
                                   price, regular way, of the principal trading
                                   session on such day on the principal United
                                   States securities exchange registered under
                                   the Securities Exchange Act of 1934, as
                                   amended (the "Exchange Act"), on which JDS
                                   Uniphase Stock (or any such other security)
                                   is listed or admitted to trading or (ii) if
                                   not listed or admitted to trading on any
                                   such securities exchange or if such last
                                   reported sale price is not obtainable (even
                                   if JDS Uniphase Stock (or any such other
                                   security) is listed or admitted to trading
                                   on such securities exchange), the last
                                   reported sale price of the principal trading
                                   session on the over-the-counter market as
                                   reported on the Nasdaq National Market or
                                   OTC Bulletin Board on such day. If the last
                                   reported sale price of the principal trading
                                   session is not available pursuant to clause
                                   (i) or (ii) of the preceding sentence
                                   because of a Market Disruption Event or
                                   otherwise, the Market Price for any Trading
                                   Day shall be the mean, as determined by the
                                   Calculation Agent, of the bid prices for JDS
                                   Uniphase Stock (or any such other security)
                                   obtained from as many dealers in such stock
                                   (which may include MS & Co. or any of our
                                   other subsidiaries or affiliates), but not
                                   exceeding three, as will make such bid
                                   prices available to the Calculation Agent. A
                                   "security of the Nasdaq National Market"
                                   shall include a security included in any
                                   successor to such system and the term "OTC
                                   Bulletin Board Service" shall include any
                                   successor service thereto.

Trading Day...................     A day, as determined by the Calculation
                                   Agent, on which trading is generally
                                   conducted on the New York Stock Exchange
                                   ("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.

Acceleration Event............     If on any date the product of the Market
                                   Price per share of JDS Uniphase Stock and
                                   the Exchange Factor is less than $4.00, the
                                   maturity date of the Reset PERQS will be
                                   deemed to be accelerated to such date, and
                                   we will apply each $      principal amount of
                                   each Reset PERQS as payment for a number of
                                   shares of JDS Uniphase Stock at the then
                                   current Exchange Ratio, as adjusted by the
                                   then current Exchange Factor. See also
                                   "Antidilution Adjustments" below.

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

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

                                     PS-11

<PAGE>

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

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

Agent for the underwritten
  offering of Reset PERQS.....     MS & Co.

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, potential conflicts of interest
                                   may exist between the Calculation Agent and
                                   you as an owner of the Reset PERQS,
                                   including with respect to certain
                                   determinations and judgments that the
                                   Calculation Agent must make in making
                                   adjustments to the Exchange Factor or other
                                   antidilution adjustments or determining any
                                   Market Price or whether a Market Disruption
                                   Event has occurred. See "Antidilution
                                   Adjustments" and "Market Disruption Event"
                                   below. MS & Co. is obligated to carry out
                                   its duties and functions as Calculation
                                   Agent in good faith and using its reasonable
                                   judgment.

Antidilution Adjustments......     The Exchange Factor will be adjusted as
                                   follows:

                                        1. If JDS Uniphase Stock is subject to a
                                   stock split or reverse stock split, then
                                   once such split has become effective, the
                                   Exchange Factor will be adjusted to equal
                                   the product of the prior Exchange Factor and
                                   the number of shares issued in such stock
                                   split or reverse stock split with respect to
                                   one share of JDS Uniphase Stock.

                                        2. If JDS Uniphase Stock is subject (i)
                                   to a stock dividend (issuance of additional
                                   shares of JDS Uniphase Stock) that is given
                                   ratably to all holders of shares of JDS
                                   Uniphase Stock or (ii) to a distribution of
                                   JDS Uniphase Stock as a result of the
                                   triggering of any provision of the corporate
                                   charter of JDS Uniphase, then once the
                                   dividend has become effective and JDS
                                   Uniphase Stock is trading ex- dividend, the
                                   Exchange Factor will be adjusted so that the
                                   new Exchange Factor shall equal the prior
                                   Exchange Factor plus the product of (i) the
                                   number of shares issued with respect to one
                                   share of JDS Uniphase Stock and (ii) the
                                   prior Exchange Factor.

                                        3. There will be no adjustments to the
                                   Exchange Factor to reflect cash dividends or
                                   other distributions paid with respect to JDS
                                   Uniphase Stock other than distributions
                                   described in clauses (i) and (v) of
                                   paragraph 5 below and Extraordinary
                                   Dividends as described below. A cash
                                   dividend or other distribution with respect
                                   to JDS Uniphase Stock will be deemed to be
                                   an "Extraordinary Dividend" if such dividend
                                   or other distribution exceeds the
                                   immediately preceding non-Extraordinary
                                   Dividend for JDS Uniphase Stock by an amount
                                   equal to at least 10% of the Market Price of
                                   JDS Uniphase Stock (as adjusted for any
                                   subsequent corporate event requiring an
                                   adjustment hereunder, such as a stock split
                                   or reverse stock split) on the Trading Day
                                   preceding the ex-dividend date for the
                                   payment of such

                                     PS-12

<PAGE>

                                   Extraordinary Dividend (the "ex-dividend
                                   date"). If an Extraordinary Dividend occurs
                                   with respect to JDS Uniphase Stock, the
                                   Exchange Factor with respect to JDS Uniphase
                                   Stock will be adjusted on the ex- dividend
                                   date with respect to such Extraordinary
                                   Dividend so that the new Exchange Factor
                                   will equal the product of (i) the then
                                   current Exchange Factor and (ii) a fraction,
                                   the numerator of which is the Market Price
                                   on the Trading Day preceding the ex-dividend
                                   date, and the denominator of which is the
                                   amount by which the Market Price on the
                                   Trading Day preceding the ex-dividend date
                                   exceeds the Extraordinary Dividend Amount.
                                   The "Extraordinary Dividend Amount" with
                                   respect to an Extraordinary Dividend for JDS
                                   Uniphase Stock will equal (i) in the case of
                                   cash dividends or other distributions that
                                   constitute regular dividends, the amount per
                                   share of such Extraordinary Dividend minus
                                   the amount per share of the immediately
                                   preceding non-Extraordinary Dividend for JDS
                                   Uniphase Stock or (ii) in the case of cash
                                   dividends or other distributions that do not
                                   constitute regular dividends, the amount per
                                   share of such Extraordinary Dividend. To the
                                   extent an Extraordinary Dividend is not paid
                                   in cash, the value of the non-cash component
                                   will be determined by the Calculation Agent,
                                   whose determination shall be conclusive. A
                                   distribution on the JDS Uniphase Stock
                                   described in clause (i) or clause (v) of
                                   paragraph 5 below that also constitutes an
                                   Extraordinary Dividend shall cause an
                                   adjustment to the Exchange Factor pursuant
                                   only to clause (i) or clause (v) of
                                   paragraph 5, as applicable.

                                        4. If JDS Uniphase issues rights or
                                   warrants to all holders of JDS Uniphase
                                   Stock to subscribe for or purchase JDS
                                   Uniphase Stock at an exercise price per
                                   share less than the Market Price of the JDS
                                   Uniphase Stock on both (i) the date the
                                   exercise price of such rights or warrants is
                                   determined and (ii) the expiration date of
                                   such rights or warrants, and if the
                                   expiration date of such rights or warrants
                                   precedes the maturity of the Reset PERQS,
                                   then the Exchange Factor will be adjusted to
                                   equal the product of the prior Exchange
                                   Factor and a fraction, the numerator of
                                   which shall be the number of shares of JDS
                                   Uniphase Stock outstanding immediately prior
                                   to the issuance of such rights or warrants
                                   plus the number of additional shares of JDS
                                   Uniphase Stock offered for subscription or
                                   purchase pursuant to such rights or warrants
                                   and the denominator of which shall be the
                                   number of shares of JDS Uniphase Stock
                                   outstanding immediately prior to the
                                   issuance of such rights or warrants plus the
                                   number of additional shares of JDS Uniphase
                                   Stock which the aggregate offering price of
                                   the total number of shares of JDS Uniphase
                                   Stock so offered for subscription or
                                   purchase pursuant to such rights or warrants
                                   would purchase at the Market Price on the
                                   expiration date of such rights or warrants,
                                   which shall be determined by multiplying
                                   such total number of shares offered by the
                                   exercise price of such rights or warrants
                                   and dividing the product so obtained by such
                                   Market Price.

                                        5. If (i) there occurs any
                                   reclassification or change of JDS Uniphase
                                   Stock, including, without limitation, as a
                                   result of the issuance of any tracking stock
                                   by JDS Uniphase, (ii) JDS Uniphase or any
                                   surviving entity or subsequent surviving
                                   entity of JDS Uniphase (an "JDS Uniphase
                                   Successor") has been subject to a merger,
                                   combination or consolidation and is not the
                                   surviving entity, (iii) any statutory
                                   exchange of securities of JDS Uniphase or
                                   any JDS

                                     PS-13

<PAGE>

                                   Uniphase Successor with another corporation
                                   occurs (other than pursuant to clause (ii)
                                   above), (iv) JDS Uniphase is liquidated, (v)
                                   JDS Uniphase issues to all of its
                                   shareholders equity securities of an issuer
                                   other than JDS Uniphase (other than in a
                                   transaction described in clauses (ii), (iii)
                                   or (iv) above) (a "Spin-off Event") or (vi)
                                   a tender or exchange offer or going-private
                                   transaction is consummated for all the
                                   outstanding shares of JDS Uniphase Stock
                                   (any such event in clauses (i) through (vi)
                                   a "Reorganization Event"), the method of
                                   determining the amount payable upon exchange
                                   at maturity for each Reset PERQS will be
                                   adjusted to provide that each holder of
                                   Reset PERQS will receive at maturity, in
                                   respect of each $    principal amount of each
                                   Reset PERQS, securities, cash or any other
                                   assets distributed to holders of JDS
                                   Uniphase Stock in any such Reorganization
                                   Event, including, in the case of the
                                   issuance of tracking stock, the reclassified
                                   share of JDS Uniphase Stock and, in the case
                                   of a Spin-off Event, the share of JDS
                                   Uniphase Stock with respect to which the
                                   spun-off security was issued (collectively,
                                   the "Exchange Property") in an amount with a
                                   value equal to the product of the final
                                   Exchange Ratio and the Transaction Value. In
                                   addition, following a Reorganization Event,
                                   the method of determining the Maturity Price
                                   will be adjusted so that the Maturity Price
                                   will mean the Transaction Value as of the
                                   second scheduled Trading Day immediately
                                   prior to maturity, and if the Reorganization
                                   Event occurs prior to the First Year
                                   Determination Date, the First Year Closing
                                   Price will mean the Transaction Value
                                   determined as of the First Year
                                   Determination Date. Notwithstanding the
                                   above, if the Exchange Property received in
                                   any such Reorganization Event consists only
                                   of cash, the maturity date of the Reset
                                   PERQS will be deemed to be accelerated to
                                   the date on which such cash is distributed
                                   to holders of JDS Uniphase Stock and holders
                                   will receive in lieu of any JDS Uniphase
                                   Stock and as liquidated damages in full
                                   satisfaction of MSDW's obligations under the
                                   Reset PERQS the product of (i) the
                                   Transaction Value as of such date and (ii)
                                   the then current Exchange Ratio adjusted as
                                   if such date were the next to occur of
                                   either the First Year Determination Date or
                                   the second scheduled Trading Day prior to
                                   maturity. If Exchange Property consists of
                                   more than one type of property, holders of
                                   Reset PERQS will receive at maturity a pro
                                   rata share of each such type of Exchange
                                   Property. If Exchange Property includes a
                                   cash component, holders will not receive any
                                   interest accrued on such cash component.
                                   "Transaction Value" at any date means (i)
                                   for any cash received in any such
                                   Reorganization Event, the amount of cash
                                   received per share of JDS Uniphase Stock, as
                                   adjusted by the Exchange Factor at the time
                                   of such Reorganization Event, (ii) for any
                                   property other than cash or securities
                                   received in any such Reorganization Event,
                                   the market value, as determined by the
                                   Calculation Agent, as of the date of
                                   receipt, of such Exchange Property received
                                   for each share of JDS Uniphase Stock, as
                                   adjusted by the Exchange Factor at the time
                                   of such Reorganization Event and (iii) for
                                   any security received in any such
                                   Reorganization Event, an amount equal to the
                                   Market Price, as of the date on which the
                                   Transaction Value is determined, per share
                                   of such security multiplied by the quantity
                                   of such security received for each share of
                                   JDS Uniphase Stock, as adjusted by the
                                   Exchange Factor at the time of such
                                   Reorganization Event. In the event Exchange
                                   Property consists of securities, those
                                   securities will, in turn, be subject to the
                                   antidilution adjustments set forth in
                                   paragraphs 1 through 5.

                                     PS-14

<PAGE>

                                   For purposes of paragraph 5 above, in the
                                   case of a consummated tender or exchange
                                   offer or going-private transaction involving
                                   Exchange Property of a particular type,
                                   Exchange Property shall be deemed to include
                                   the amount of cash or other property paid by
                                   the offeror in the tender or exchange offer
                                   with respect to such Exchange Property (in
                                   an amount determined on the basis of the
                                   rate of exchange in such tender or exchange
                                   offer or going-private transaction). In the
                                   event of a tender or exchange offer or a
                                   going- private transaction with respect to
                                   Exchange Property in which an offeree may
                                   elect to receive cash or other property,
                                   Exchange Property shall be deemed to include
                                   the kind and amount of cash and other
                                   property received by offerees who elect to
                                   receive cash.

                                   No adjustments to the Exchange Factor will
                                   be required unless such adjustment would
                                   require a change of at least 0.1% in the
                                   Exchange Factor then in effect. The Exchange
                                   Factor resulting from any of the adjustments
                                   specified above will be rounded to the
                                   nearest one hundred-thousandth with five
                                   one-millionths being rounded upward.

                                   No adjustments to the Exchange Factor or
                                   method of calculating the Exchange Ratio
                                   will be made other than those specified
                                   above. The adjustments specified above do
                                   not cover all events that could affect the
                                   Market Price of the JDS Uniphase Stock,
                                   including, without limitation, a partial
                                   tender or exchange offer for the JDS
                                   Uniphase Stock.

                                   Notwithstanding the foregoing, the amount
                                   payable by us at maturity with respect to
                                   each Reset PERQS, determined as of the
                                   second scheduled Trading Day prior to
                                   maturity, will not under any circumstances
                                   exceed an amount of JDS Uniphase Stock
                                   having a market value of $ as of such second
                                   scheduled Trading Day.

                                   The Calculation Agent shall be solely
                                   responsible for the determination and
                                   calculation of any adjustments to the
                                   Exchange Factor or method of calculating the
                                   Exchange Ratio and of any related
                                   determinations and calculations with respect
                                   to any distributions of stock, other
                                   securities or other property or assets
                                   (including cash) in connection with any
                                   corporate event described in paragraph 5
                                   above, and its determinations and
                                   calculations with respect thereto shall be
                                   conclusive in the absence of manifest error.

                                   The Calculation Agent will provide
                                   information as to any adjustments to the
                                   Exchange Factor or method of calculating the
                                   Exchange Ratio upon written request by any
                                   holder of the Reset PERQS.

Market Disruption Event.......     "Market Disruption Event" means, with respect
                                   to JDS Uniphase Stock:

                                        (i) a suspension, absence or material
                                        limitation of trading of JDS Uniphase
                                        Stock on the primary market for JDS
                                        Uniphase Stock for more than two hours
                                        of trading or during the one-half hour
                                        period preceding the close of the
                                        principal trading session in such
                                        market; or a breakdown or failure in
                                        the price and trade reporting systems
                                        of the primary market for JDS Uniphase
                                        Stock as a result of which the reported
                                        trading prices for JDS Uniphase

                                     PS-15

<PAGE>

                                        Stock during the last one-half hour
                                        preceding the closing of the principal
                                        trading session in such market are
                                        materially inaccurate; or the
                                        suspension, absence or material
                                        limitation on the primary market for
                                        trading in options contracts related to
                                        JDS Uniphase Stock, if available,
                                        during the one-half hour period
                                        preceding the close of the principal
                                        trading session in the applicable
                                        market, in each case as determined by
                                        the Calculation Agent in its sole
                                        discretion; and

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

                                   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, (2) a
                                   decision to permanently discontinue trading
                                   in the relevant option contract will not
                                   constitute a Market Disruption Event, (3)
                                   limitations pursuant to NYSE Rule 80A (or
                                   any applicable rule or regulation enacted or
                                   promulgated by the NYSE, any other
                                   self-regulatory organization or the
                                   Securities and Exchange Commission of
                                   similar scope as determined by the
                                   Calculation Agent) on trading during
                                   significant market fluctuations shall
                                   constitute a suspension, absence or material
                                   limitation of trading, (4) a suspension of
                                   trading in an options contract on JDS
                                   Uniphase Stock by the primary securities
                                   market trading in such options, if
                                   available, by reason of (x) a price change
                                   exceeding limits set by such securities
                                   exchange or market, (y) an imbalance of
                                   orders relating to such contracts or (z) a
                                   disparity in bid and ask quotes relating to
                                   such contracts will constitute a suspension
                                   or material limitation of trading in options
                                   contracts related to JDS Uniphase Stock and
                                   (5) a suspension, absence or material
                                   limitation of trading on the primary
                                   securities market on which options contracts
                                   related to JDS Uniphase Stock are traded
                                   will not include any time when such
                                   securities market is itself closed for
                                   trading under ordinary circumstances.

Alternate Exchange
  Calculation in case of an
  Event of Default............     In case an event of default with respect to
                                   the Reset PERQS shall have occurred and be
                                   continuing, the amount declared due and
                                   payable upon any acceleration of the Reset
                                   PERQS shall be determined by the Calculation
                                   Agent and shall be equal to the product of
                                   (i) the Market Price of JDS Uniphase Stock
                                   as of the date of such acceleration and (ii)
                                   the then current Exchange Ratio adjusted as
                                   if such date were the second scheduled
                                   Trading Day prior to maturity and, if such
                                   date occurs prior to the First Year
                                   Determination Date, the First Year
                                   Determination Date.

JDS Uniphase Stock; Public
  Information.................     JDS Uniphase Corporation is a provider of
                                   advanced fiberoptic components and modules.
                                   JDS Uniphase Stock is registered under the
                                   Exchange Act. Companies with securities
                                   registered under the Exchange Act are
                                   required to file periodically certain
                                   financial and other information specified by
                                   the Securities and Exchange Commission (the
                                   "Commission"). Information provided to or
                                   filed

                                     PS-16

<PAGE>

                                   with the Commission can be inspected and
                                   copied at the public reference facilities
                                   maintained by the Commission at Room 1024,
                                   450 Fifth Street, N.W., Washington, D.C.
                                   20549 or at its Regional Offices located at
                                   Suite 1400, Citicorp Center, 500 West
                                   Madison Street, Chicago, Illinois 60661 and
                                   at Seven World Trade Center, 13th Floor, New
                                   York, New York 10048, and copies of such
                                   material can be obtained from the Public
                                   Reference Section of the Commission, 450
                                   Fifth Street, N.W., Washington, D.C. 20549,
                                   at prescribed rates. In addition,
                                   information provided to or filed with the
                                   Commission electronically can be accessed
                                   through a website maintained by the
                                   Commission. The address of the Commission's
                                   website is http://www.sec.gov. Information
                                   provided to or filed with the Commission by
                                   JDS Uniphase pursuant to the Exchange Act
                                   can be located by reference to Commission
                                   file number 0-22874. In addition,
                                   information regarding JDS Uniphase may be
                                   obtained from other sources including, but
                                   not limited to, press releases, newspaper
                                   articles and other publicly disseminated
                                   documents. We make no representation or
                                   warranty as to the accuracy or completeness
                                   of such information.

                                   This pricing supplement relates only to the
                                   Reset PERQS offered hereby and does not
                                   relate to JDS Uniphase Stock or other
                                   securities of JDS Uniphase. We have derived
                                   all disclosures contained in this pricing
                                   supplement regarding JDS Uniphase from the
                                   publicly available documents described in
                                   the preceding paragraph. Neither we nor the
                                   Agent has participated in the preparation of
                                   such documents or made any due diligence
                                   inquiry with respect to JDS Uniphase in
                                   connection with the offering of the Reset
                                   PERQS. Neither we nor the Agent makes any
                                   representation that such publicly available
                                   documents or any other publicly available
                                   information regarding JDS Uniphase is
                                   accurate or complete. Furthermore, we cannot
                                   give any assurance that all events occurring
                                   prior to the date hereof (including events
                                   that would affect the accuracy or
                                   completeness of the publicly available
                                   documents described in the preceding
                                   paragraph) that would affect the trading
                                   price of JDS Uniphase Stock (and therefore
                                   the Initial JDS Uniphase Stock Price, the
                                   First Year Cap Price, the Second Year Cap
                                   Price and the maximum appreciation amount)
                                   have been publicly disclosed. Subsequent
                                   disclosure of any such events or the
                                   disclosure of or failure to disclose
                                   material future events concerning JDS
                                   Uniphase could affect the value received at
                                   maturity with respect to the Reset PERQS and
                                   therefore the trading prices of the Reset
                                   PERQS.

                                   Neither we nor any of our affiliates makes
                                   any representation to you as to the
                                   performance of JDS Uniphase Stock.

                                   We and/or our subsidiaries may presently or
                                   from time to time engage in business with
                                   JDS Uniphase, including extending loans to,
                                   or making equity investments in, JDS
                                   Uniphase or providing advisory services to
                                   JDS Uniphase, including merger and
                                   acquisition advisory services. In the course
                                   of such business, we and/or our subsidiaries
                                   may acquire non-public information with
                                   respect to JDS Uniphase and, in addition,
                                   one or more of our affiliates may publish
                                   research reports with respect to JDS
                                   Uniphase. The statement in the preceding

                                     PS-17

<PAGE>

                                   sentence is not intended to affect the right
                                   of holders of the Reset PERQS under the
                                   securities laws. As a prospective purchaser
                                   of a Reset PERQS, you should undertake an
                                   independent investigation of JDS Uniphase as
                                   in your judgment is appropriate to make an
                                   informed decision with respect to an
                                   investment in JDS Uniphase Stock.

Historical Information........     The following table sets forth the high and
                                   low Market Price during 1997, 1998, 1999 and
                                   2000 through May 26, 2000. The Market Price
                                   on May 26, 2000 was $80 1/2. We obtained the
                                   Market Prices listed below from Bloomberg
                                   Financial Markets and we believe such
                                   information to be accurate. You should not
                                   take the historical prices of JDS Uniphase
                                   Stock as an indication of future
                                   performance. The price of JDS Uniphase Stock
                                   may decrease so that you will receive at
                                   maturity shares of JDS Uniphase Stock worth
                                   less than the principal amount of the Reset
                                   PERQS. We cannot give you any assurance that
                                   the price of JDS Uniphase Stock will
                                   increase so that at maturity you will
                                   receive an amount in excess of the principal
                                   amount of the Reset PERQS. Because your
                                   return is linked to the Market Price of JDS
                                   Uniphase Stock on June 29, 2001 and June 26,
                                   2002, there is no guaranteed return of
                                   principal. To the extent that the Maturity
                                   Price of JDS Uniphase Stock is less than the
                                   Initial JDS Uniphase Stock Price or not
                                   sufficiently above the Initial JDS Uniphase
                                   Stock Price to compensate for a downward
                                   adjustment of the Exchange Ratio, if any, at
                                   June 29, 2001 and the shortfall is not
                                   offset by the coupon paid on the Reset
                                   PERQS, you will lose money on your
                                   investment.

                                                               High        Low
                                                               ----       ----
                                   (CUSIP 46612J101)
                                   1997
                                   First Quarter............  3 3/32     1 84/85
                                   Second Quarter...........  3 15/19    2 8/41
                                   Third Quarter............  5 2/85     3 50/81
                                   Fourth Quarter...........  5 13/16    3 9/16
                                   1998
                                   First Quarter............  5 40/77    4 4/27
                                   Second Quarter...........  7 7/8      5 5/64
                                   Third Quarter............  7 7/8      4 45/64
                                   Fourth Quarter...........  8 43/64    4 19/64
                                   1999
                                   First Quarter............ 14 25/64    7 15/16
                                   Second Quarter........... 20 3/4     13 13/64
                                   Third Quarter............ 29 9/64    19 50/79
                                   Fourth Quarter........... 83 13/16   28 13/16
                                   2000
                                   First Quarter............146 17/32   74 7/8
                                   Second Quarter           121 7/8     79
                                     (through May 26, 2000).

                                   Historical prices have been adjusted for
                                   four 2 for 1 stock splits of JDS Uniphase
                                   Stock, which became effective in the fourth
                                   quarter of 1997, the third quarter of 1999,
                                   the fourth quarter of 1999 and the first
                                   quarter of 2000, respectively.

                                   JDS Uniphase has not paid cash dividends on
                                   JDS Uniphase Stock to date. We make no
                                   representation as to the amount of
                                   dividends, if any, that JDS Uniphase will
                                   pay in the future. In any event, as a

                                     PS-18

<PAGE>

                                   holder of the Reset PERQS, you will not be
                                   entitled to receive dividends, if any, that
                                   may be payable on JDS Uniphase Stock.

Use of Proceeds and Hedging...     The net proceeds we receive from the sale of
                                   the Reset PERQS will be used for general
                                   corporate purposes and, in part, by us or by
                                   one or more of our subsidiaries in
                                   connection with hedging our obligations
                                   under the Reset PERQS. 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 Reset PERQS by taking
                                   positions in JDS Uniphase Stock, in options
                                   contracts on JDS Uniphase Stock listed on
                                   major securities markets or positions in any
                                   other 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 Reset PERQS. Purchase
                                   activity could potentially increase the
                                   price of JDS Uniphase Stock, and therefore
                                   effectively increase the level to which JDS
                                   Uniphase Stock must rise before you would
                                   receive at maturity an amount of JDS
                                   Uniphase Stock worth as much as or more than
                                   the principal amount of the Reset PERQS.
                                   Although we have no reason to believe that
                                   our hedging activity will have a material
                                   impact on the price of JDS Uniphase Stock,
                                   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
                                   Reset PERQS, including on the First Year
                                   Determination Date, by purchasing and
                                   selling the securities and instruments
                                   listed above and any other available
                                   securities and instruments that we may wish
                                   to use in connection with such hedging.

Supplemental Information
  Concerning Plan of
  Distribution................     In order to facilitate the offering of the
                                   Reset PERQS, the Agent may engage in
                                   transactions that stabilize, maintain or
                                   otherwise affect the price of the Reset
                                   PERQS or the JDS Uniphase Stock.
                                   Specifically, the Agent may overallot in
                                   connection with the offering, creating a
                                   short position in the Reset PERQS for its
                                   own account. In addition, to cover
                                   allotments or to stabilize the price of the
                                   Reset PERQS, the Agent may bid for, and
                                   purchase, the Reset PERQS or the JDS
                                   Uniphase Stock in the open market. See "Use
                                   of Proceeds and Hedging" above.

                                   The Agent proposes initially to offer the
                                   Reset PERQS directly to the public at the
                                   public offering price set forth on the cover
                                   page hereof plus accrued interest, if any,
                                   from the Original Issue Date; provided that
                                   the price will be $ per Reset PERQS and the
                                   underwriting discounts and commissions will
                                   be $ per Reset PERQS for purchasers of
                                   greater than or equal to 100,000 Reset PERQS
                                   in any single transaction, subject to the
                                   holding period requirements described below.

                                   Delivery of approximately 98.25% of the
                                   Reset PERQS to a purchaser of 100,000 or
                                   more Reset PERQS at the reduced price (the
                                   "Delivered Reset PERQS") will be made on the
                                   date of delivery of

                                     PS-19

<PAGE>

                                   the Reset PERQS referred to on the cover of
                                   this pricing supplement. The balance of
                                   approximately 1.75% of the Reset PERQS (the
                                   "Escrowed Reset PERQS") 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 Reset
                                   PERQS have held all of the Delivered Reset
                                   PERQS 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 Reset PERQS fails to satisfy the
                                   holding period requirement, as determined by
                                   the Agent, all of the investor's Escrowed
                                   Reset PERQS will be forfeited by the
                                   investor and not delivered to it. The
                                   Escrowed Reset PERQS will instead be
                                   delivered to the Agent for sale to
                                   investors. This forfeiture will have the
                                   effect of increasing the purchase price per
                                   Reset PERQS for such investors to 100% of
                                   the principal amount of the Reset PERQS.
                                   Should investors who are subject to the
                                   holding period requirement sell their Reset
                                   PERQS once the holding period is no longer
                                   applicable, the market price of the Reset
                                   PERQS may be adversely affected. See also
                                   "Plan of Distribution" in the accompanying
                                   prospectus supplement.

ERISA Matters for Pension
  Plans and Insurance
  Companies...................     We and certain of our subsidiaries and
                                   affiliates, including MS & Co. and Dean
                                   Witter Reynolds Inc. ("DWR"), may each be
                                   considered a "party in interest" within the
                                   meaning of the Employee Retirement Income
                                   Security Act of 1974, as amended ("ERISA"),
                                   or a "disqualified person" within the
                                   meaning of the Internal Revenue Code of
                                   1986, as amended (the "Code") with respect
                                   to many employee benefit plans. Prohibited
                                   transactions within the meaning of ERISA or
                                   the Code may arise, for example, if the
                                   Reset PERQS are acquired by or with the
                                   assets of a pension or other employee
                                   benefit plan with respect to which MS & Co.,
                                   DWR or any of their affiliates is a service
                                   provider, unless the Reset PERQS are
                                   acquired pursuant to an exemption from the
                                   prohibited transaction rules.

                                   The acquisition of the Reset PERQS may be
                                   eligible for one of the exemptions noted
                                   below if such acquisition:

                                   (a) (i) is made solely with the assets of a
                                   bank collective investment fund and (ii)
                                   satisfies the requirements and conditions of
                                   Prohibited Transaction Class Exemption
                                   ("PTCE") 91-38 issued by the Department of
                                   Labor ("DOL");

                                   (b) (i) is made solely with assets of an
                                   insurance company pooled separate account
                                   and (ii) satisfies the requirements and
                                   conditions of PTCE 90-1 issued by the DOL;

                                   (c) (i) is made solely with assets managed
                                   by a qualified professional asset manager
                                   and (ii) satisfies the requirements and
                                   conditions of PTCE 84-14 issued by the DOL;

                                   (d) is made solely with assets of a
                                   governmental plan (as defined in Section
                                   3(32) of ERISA) which is not subject to the
                                   provisions of Section 401 of the Code;

                                     PS-20

<PAGE>

                                   (e) (i) is made solely with assets of an
                                   insurance company general account and (ii)
                                   satisfies the requirements and conditions of
                                   PTCE 95-60 issued by the DOL; or

                                   (f) (i) is made solely with assets managed
                                   by an in-house asset manager and (ii)
                                   satisfies the requirements and conditions of
                                   PTCE 96-23 issued by the DOL.

                                   Under ERISA the assets of a pension or other
                                   employee benefit 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 owning the
                                   Reset PERQS, employee benefit plans subject
                                   to ERISA (or insurance companies deemed to
                                   be investing ERISA plan assets) purchasing
                                   Reset PERQS should consider the possible
                                   implications of owning the JDS Uniphase
                                   Stock. Thus, any insurance company, pension
                                   or employee benefit plan or entity holding
                                   assets of such a plan proposing to invest in
                                   the Reset PERQS should consult with its
                                   legal counsel prior to such investment.

United States Federal Income
  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 Reset PERQS purchasing the
                                   Reset PERQS at the Issue Price, who will
                                   hold the Reset PERQS 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 the U.S.
                                   federal income taxation that may be relevant
                                   to a particular holder in light of its
                                   individual circumstances or 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 Reset
                                   PERQS 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 Reset PERQS 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 Reset PERQS, we
                                   and every holder of a Reset PERQS agree (in
                                   the absence of an administrative
                                   determination or judicial ruling to the
                                   contrary) to characterize a Reset PERQS for
                                   all tax purposes as an investment unit
                                   consisting of the following components (the
                                   "Components"): (i) a contract (the "Forward
                                   Contract") that requires the holder of the
                                   Reset PERQS to purchase, and us to sell, for
                                   an amount equal to $ (the "Forward Price"),
                                   the JDS Uniphase Stock at maturity (or,
                                   alternatively, upon an earlier redemption of
                                   the Reset PERQS), and (ii) a deposit with us
                                   of a fixed amount of cash, equal to the
                                   Issue Price, to secure the

                                     PS-21

<PAGE>

                                   holder's obligation to purchase the JDS
                                   Uniphase Stock (the "Deposit"), which
                                   Deposit bears an annual yield of    % per
                                   annum, which yield is based on our cost of
                                   borrowing. Under this characterization, it
                                   is possible that less than the full
                                   quarterly payments on the Reset PERQS will
                                   be attributable to the yield on the Deposit.
                                   If this is the case, the excess of the
                                   quarterly payments on the Reset PERQS over
                                   the portion of those payments attributable
                                   to the yield on the Deposit would represent
                                   payments attributable to the holders' entry
                                   into the Forward Contract (the "Contract
                                   Fees"). Furthermore, based on our
                                   determination of the relative fair market
                                   values of the Components at the time of
                                   issuance of the Reset PERQS, we will
                                   allocate 100% of the Issue Price of the
                                   Reset PERQS to the Deposit and none to the
                                   Forward Contract. Our allocation of the
                                   Issue Price among the Components will be
                                   binding on a holder of the Reset PERQS,
                                   unless such holder timely and explicitly
                                   discloses to the IRS that its allocation is
                                   different from ours. The treatment of the
                                   Reset PERQS described above and our
                                   allocation are not, however, binding on the
                                   IRS or the courts. No statutory, judicial or
                                   administrative authority directly addresses
                                   the characterization of the Reset PERQS or
                                   instruments similar to the Reset PERQS for
                                   U.S. federal income tax purposes, and no
                                   ruling is being requested from the IRS with
                                   respect to the Reset PERQS. Due to the
                                   absence of authorities that directly address
                                   instruments that are similar to the Reset
                                   PERQS, Tax Counsel is unable to render an
                                   opinion as to the proper U.S. federal income
                                   tax characterization of the Reset PERQS. As
                                   a result, significant aspects of the U.S.
                                   federal income tax consequences of an
                                   investment in the Reset PERQS 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
                                   tax advisor regarding the U.S. federal
                                   income tax consequences of an investment in
                                   the Reset PERQS (including alternative
                                   characterizations of the Reset PERQS) 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 and the allocation
                                   described above.

                                   U.S. HOLDERS

                                   As used herein, the term "U.S. Holder" means
                                   an owner of a Reset PERQS that is, for U.S.
                                   federal income tax purposes, (i) a citizen
                                   or resident of the United States, (ii) a
                                   corporation created or organized under the
                                   laws of the United States or any political
                                   subdivision thereof or (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 Reset PERQS

                                   Assuming the characterization of the Reset
                                   PERQS and the allocation of the Issue Price
                                   as set forth above, Tax Counsel believes
                                   that the following U.S. federal income tax
                                   consequences should result.

                                   Quarterly Payments and Original Issue
                                   Discount on the Reset PERQS. If the Forward
                                   Price exceeds the Issue Price by at least

                                     PS-22

<PAGE>

                                   0.25% of the Forward Price multiplied by the
                                   number of complete years to maturity, the
                                   Deposit will be subject to the "original
                                   issue discount" rules, and a U.S. Holder
                                   will include "qualified stated interest"
                                   equal to the stated interest on the Reset
                                   PERQS in income in accordance with the U.S.
                                   Holder's method of accounting for federal
                                   income tax purposes. Additionally, each U.S.
                                   Holder, including a taxpayer who otherwise
                                   uses the cash method of accounting, will be
                                   required to include original issue discount
                                   ("OID") on the Deposit (in an aggregate
                                   amount equal to the Forward Price less the
                                   Issue Price) in income as it accrues, in
                                   accordance with a constant yield method
                                   based on a compounding of interest. Under
                                   these circumstances, the amount of income
                                   recognized by a U.S. Holder will generally
                                   be more than the stated interest paid to the
                                   U.S. Holder and will increase during the
                                   term of the Reset PERQS.

                                   If the Forward Price of the Reset PERQS
                                   exceeds the Issue Price by less than 0.25%
                                   of the Forward Price multiplied by the
                                   number of complete years to maturity, such
                                   excess will be treated as de minimis OID,
                                   and will be taxable to the holder at
                                   maturity as capital gain (unless the holder
                                   elects to accrue such de minimis OID on a
                                   current basis). Quarterly payments on the
                                   Reset PERQS will generally be taxable to a
                                   U.S. Holder as ordinary income at the time
                                   accrued or received in accordance with the
                                   U.S. Holder's method of accounting for U.S.
                                   federal income tax purposes.

                                   However, if the Forward Price does not
                                   exceed the Issue Price, then to the extent
                                   attributable to the yield on the Deposit,
                                   quarterly payments on the Reset PERQS will
                                   generally be taxable to a U.S. Holder as
                                   ordinary income at the time accrued or
                                   received in accordance with the U.S.
                                   Holder's method of accounting for U.S.
                                   federal income tax purposes. As discussed
                                   above, any excess of the quarterly payments
                                   over the portion thereof attributable to the
                                   yield on the Deposit will be treated as
                                   Contract Fees. Although the federal income
                                   tax treatment of Contract Fees is uncertain,
                                   we intend to take the position that any
                                   Contract Fees with respect to the Reset
                                   PERQS constitute taxable income to a U.S.
                                   Holder at the time accrued or received in
                                   accordance with the U.S. Holder's method of
                                   accounting for U.S. federal income tax
                                   purposes.

                                   Tax Basis. Based on our determination set
                                   forth above, the U.S. Holder's tax basis in
                                   the Forward Contract will be zero, and the
                                   U.S. Holder's tax basis in the Deposit will
                                   be 100% of the Issue Price. The U.S.
                                   Holder's tax basis in the Deposit will be
                                   subsequently increased by any OID accrued
                                   with respect thereto.

                                   Settlement of the Forward Contract. Upon the
                                   maturity of the Forward Contract, a U.S.
                                   Holder would, pursuant to the Forward
                                   Contract, be deemed to have applied the
                                   Forward Price toward the purchase of JDS
                                   Uniphase Stock, and a U.S. Holder would not
                                   recognize any gain or loss with respect to
                                   any JDS Uniphase Stock received thereon.
                                   However, as stated above, any de minimis OID
                                   on the Deposit that the holder has not
                                   previously included in income will be
                                   taxable to the holder at the maturity of the
                                   Deposit and the concurrent settlement of the
                                   Forward Contract. With respect to any cash
                                   received upon maturity, a U.S. Holder would
                                   recognize gain or

                                     PS-23

<PAGE>

                                   loss. The amount of such gain or loss would
                                   be the extent to which the amount of such
                                   cash received differs from the pro rata
                                   portion of the Forward Price allocable to
                                   the cash. Any such gain or loss would
                                   generally be capital gain or loss, as the
                                   case may be.

                                   With respect to any JDS Uniphase Stock
                                   received upon maturity, the U.S. Holder
                                   would have an adjusted tax basis in such JDS
                                   Uniphase Stock equal to the pro rata portion
                                   of the Forward Price allocable thereto. The
                                   allocation of the Forward Price between cash
                                   and JDS Uniphase Stock should be based on
                                   the amount of the cash received and the
                                   relative fair market value, as of the
                                   maturity, of the JDS Uniphase Stock. U.S.
                                   Holders should note that the holding period
                                   of any JDS Uniphase Stock received would
                                   start on the day after the maturity of the
                                   Reset PERQS.

                                   U.S. Holders should note that while any
                                   accrued but unpaid interest on the Deposit
                                   and any Contract Fees would be taxable as
                                   ordinary income, any gain or loss recognized
                                   upon the final settlement of the Forward
                                   Contract generally would be capital gain or
                                   loss. The distinction between capital gain
                                   or loss and ordinary gain or loss is
                                   potentially significant in several respects.
                                   For example, limitations apply to a U.S.
                                   Holder's ability to offset capital losses
                                   against ordinary income, and certain U.S.
                                   Holders may be subject to lower U.S. federal
                                   income tax rates with respect to long-term
                                   capital gain than with respect to ordinary
                                   gain. U.S. Holders should consult their tax
                                   advisors with respect to the treatment of
                                   capital gain or loss on a Reset PERQS.

                                   Sale or Exchange of the Reset PERQS. Upon a
                                   sale or exchange of a Reset PERQS prior to
                                   the maturity of the Reset PERQS, a U.S.
                                   Holder would recognize taxable 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 Reset PERQS
                                   so sold or exchanged. Any such gain or loss
                                   would generally be capital gain or loss, as
                                   the case may be. Such U.S. Holder's tax
                                   basis in the Reset PERQS would generally
                                   equal the U.S. Holder's tax basis in the
                                   Deposit. For these purposes, the amount
                                   realized does not include any amount
                                   attributable to accrued interest on the
                                   Deposit, which would be taxed as described
                                   under "--Quarterly Payments and Original
                                   Issue Discount on the Reset PERQS" above. It
                                   is uncertain whether the amount realized
                                   includes any amount attributable to accrued
                                   but unpaid Contract Fees. U.S. Holders
                                   should consult their tax advisors regarding
                                   the treatment of accrued but unpaid Contract
                                   Fees upon the sale or exchange of a Reset
                                   PERQS.

                                   Possible Alternative Tax Treatments of an
                                   Investment in the Reset PERQS

                                   Due to the absence of authorities that
                                   directly address the proper characterization
                                   of the Reset PERQS, 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 seek to analyze
                                   the U.S. federal income tax consequences of
                                   owning a Reset PERQS under Treasury
                                   regulations governing contingent payment
                                   debt instruments (the "Contingent Payment
                                   Regulations").

                                     PS-24

<PAGE>

                                   If the IRS were successful in asserting that
                                   the Contingent Payment Regulations applied
                                   to the Reset PERQS, the timing and character
                                   of income thereon would be significantly
                                   affected. Among other things, a U.S. Holder
                                   would be required to accrue as original
                                   issue discount income, subject to
                                   adjustments, at a "comparable yield" on the
                                   Issue Price. In addition, a U.S. Holder
                                   would recognize income upon maturity of the
                                   Reset PERQS to the extent that the value of
                                   JDS Uniphase Stock and cash (if any)
                                   received exceeds the adjusted issue price.
                                   Furthermore, any gain realized with respect
                                   to the Reset PERQS would generally be
                                   treated as ordinary income.

                                   Even if the Contingent Payment Regulations
                                   do not apply to the Reset PERQS, other
                                   alternative federal income tax
                                   characterizations or treatments of the Reset
                                   PERQS are also possible, and if applied
                                   could also affect the timing and the
                                   character of the income or loss with respect
                                   to the Reset PERQS. It is possible, for
                                   example, that a Reset PERQS could be treated
                                   as constituting a prepaid forward contract.
                                   Other alternative characterizations are also
                                   possible. Accordingly, prospective
                                   purchasers are urged to consult their tax
                                   advisors regarding the U.S. federal income
                                   tax consequences of an investment in the
                                   Reset PERQS.

                                   Constructive Ownership

                                   Section 1260 of the Code treats a taxpayer
                                   owning certain types of derivative positions
                                   in property as having "constructive
                                   ownership" in that property, with the result
                                   that all or a portion of the long term
                                   capital gain recognized or deemed to be
                                   recognized (as described below) by such
                                   taxpayer with respect to the derivative
                                   position would be recharacterized as
                                   ordinary income. Although Section 1260 in
                                   its current form does not apply to the Reset
                                   PERQS, Section 1260 authorizes the Treasury
                                   Department to promulgate regulations
                                   (possibly with retroactive effect) to expand
                                   the application of the "constructive
                                   ownership" regime. There is no assurance
                                   that the Treasury Department will not
                                   promulgate regulations to apply the regime
                                   to the Reset PERQS. If Section 1260 were to
                                   apply to the Reset PERQS, the effect on a
                                   U.S. Holder would be to treat all or a
                                   portion of the long term capital gain (if
                                   any) recognized by such U.S. Holder on sale
                                   or maturity of a Reset PERQS as ordinary
                                   income, but only to the extent such long
                                   term capital gain exceeds the long term
                                   capital gain that would have been recognized
                                   by such U.S. Holder if the U.S. Holder had
                                   acquired the underlying stock itself on the
                                   issue date of the Reset PERQS and disposed
                                   of the underlying stock upon disposition
                                   (including retirement) of the Reset PERQS.
                                   Section 1260, if applicable, would require a
                                   U.S. Holder that receives shares of JDS
                                   Uniphase Stock at maturity to recognize as
                                   ordinary income the amount that would have
                                   been treated as ordinary income according to
                                   the rule described in the preceding
                                   sentence, if the U.S. Holder had sold the
                                   Reset PERQS at maturity for fair market
                                   value. In addition, Section 1260 would
                                   impose an interest charge on the gain (or
                                   deemed gain) that was recharacterized on the
                                   sale or maturity of the Reset PERQS.

                                     PS-25

<PAGE>

                                   Backup Withholding and Information Reporting

                                   A U.S. Holder of a Reset PERQS 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-26

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