PROSPECTUS Dated May 5, 1999 Pricing Supplement No. 50 to
PROSPECTUS SUPPLEMENT Registration Statement No. 333-75289
Dated May 6, 1999 March 10, 2000
Rule 424(b)(3)
Morgan Stanley Dean Witter & Co.
MEDIUM-TERM NOTES, SERIES C
Senior Floating Rate Notes
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We will not redeem these Medium-Term Notes, Series C (Senior Floating Rate
Notes) prior to the maturity date. We describe the basic features of this type
of note in the section called "Description of Notes--Floating Rate Notes" in the
accompanying prospectus supplement, subject to and as modified by the provisions
described below. The notes are "short-term discount notes" as defined in the
accompanying prospectus supplement under the caption "United States Federal
Taxation--Notes--Discount Notes."
Principal Amount: $385,000,000
Maturity Date: March 16, 2001
Interest Accrual Date: March 16, 2000
Interest Payment Dates: Each March 16, June 16, September 16, and December
16, commencing June 16, 2000
Initial Interest Rate: To be determined on the business day immediately
preceding the Original Issue Date
Base Rate: Federal Funds Rate
Index Maturity: One Day
Spread (Plus or Minus): Plus 0.18% per annum
Index Currency: N/A
Interest Payment Period: Quarterly
Specified Currency: U.S. Dollars
Issue Price: 100%
Settlement Date
(Original Issue Date): March 16, 2000
Initial Interest Reset Date: March 17, 2000
Interest Reset Dates: Each business day except the business day
immediately preceding each interest payment date
Interest Reset Period: Daily
Interest Determination
Dates: The business day immediately preceding each
interest reset date
Reporting Service: Telerate (Page 120)
Book Entry Note or
Certificated Note: Book Entry Note
Senior Note or
Subordinated Note: Senior Note
Agent: Morgan Stanley & Co. Incorporated
Calculation Agent: The Chase Manhattan Bank
Minimum Denomination: $1,000
CUSIP: 61745EPG0
Terms not defined above have the meanings given to such terms in the
accompanying prospectus supplement.
MORGAN STANLEY DEAN WITTER
