The company also raised its 2013 guidance, and initiated a 30 cent per share quarterly dividend, one that Ackman will have to pay in accordance with short-selling rules. Short sellers must pay all dividends on a stock, as well as pay interest to the broker.

With so many arrows pointed squarely at Ackman's head, it will be interesting to see if, and when, Ackman finally closes his short position in Ackman. If that happens, it could be as Ichan once put, "the mother of all short squeezes." The pressure is mounting on Ackman to come up with something to prove his short thesis, and prove that the company is a fraud. Otherwise, this could be a very costly mistake, one that Ackman is likely not to forget.

-- Written by Chris Ciaccia in New York

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