<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
The schedule contains summary financial information extracted from Dean
Witter Portfolio Strategy Fund L.P. and is qualified in its entirety
by reference to such financial statements.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> SEP-30-2000
<CASH> 77,336,213
<SECURITIES> 0
<RECEIVABLES> 508,856<F1>
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 0
<PP&E> 0
<DEPRECIATION> 0
<TOTAL-ASSETS> 73,732,598<F2>
<CURRENT-LIABILITIES> 0
<BONDS> 0
0
0
<COMMON> 0
<OTHER-SE> 0
<TOTAL-LIABILITY-AND-EQUITY> 73,732,598<F3>
<SALES> 0
<TOTAL-REVENUES> (14,483,289)<F4>
<CGS> 0
<TOTAL-COSTS> 0
<OTHER-EXPENSES> 6,957,058
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> (21,440,347)
<INCOME-TAX> 0
<INCOME-CONTINUING> (21,440,347)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (21,440,347)
<EPS-BASIC> 0
<EPS-DILUTED> 0
<FN>
<F1>Receivables include interest receivable of $334,775 and due from DWR
of $174,081.
<F2>In addition to cash and receivables, total assets include net
unrealized loss on open contracts of $4,112,471.
<F3>Liabilities include redemptions payable of $1,478,130, management
fees payable of $245,294, and accrued administrative expenses of $144,468.
<F4>Total revenues includes realized trading revenue of $(8,483,618),
net change in unrealized of $(9,226,820) and interest income
of $3,227,149.
</FN>
</TABLE>
