Morgan Stanley Dean Witter & Co., which occupied 22 floors of the World Trade Center, saw 2,157 of its October $45 put options bought in the three trading days before Black Tuesday; this compares to an average of 27 contracts per day before September 6. Morgan Stanley's share price fell from $48.90 to $42.50 in the aftermath of the attacks. Assuming that 2,000 of these options contracts were bought based upon knowledge of the approaching attacks, their purchasers could have profited by at least $1.2 million.
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