http://slate.msn.com/id/2086811/
"But in an article in the forthcoming September Journal of Corporate Finance-the abstract can be seen here-Michael T. Maloney of Clemson University and J. Harold Mulherin of Claremont McKenna College argue that the market figured out which company was responsible within minutes of the disaster, and calculated how much the disaster would cost the culprit in lost profits within hours. It's either spooky coincidence or the ultimate proof of the efficiency of markets. "
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/jordan