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EXHIBIT 77(O) MORGAN STANLEY DEAN WITTER INCOME SECURITIES INC.
10f-3 transactions for the period December 31, 1999 - March 31, 2000
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TOTAL
ISSUED/
DATE PRICE SHARES % of PRINCIPAL PURCHASED
SECURITY PURCHASED SHARE PURCHASED Assets AMOUNT BY FUND BROKER(S)
Bank of Tokyo Mitsubishi 8.4 4/5/10
02/18/00 $ 99.91 10,000 0.490% $2,000,000,000.00 0.050% Merrill Lynch
Sempra 7.95 3/1/10 02/17/00 $ 99.738 10,000 0.50% $ 500,000,000.00 0.200% Goldman Sachs
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