Wasn’t there some mysterious short selling (in AMR, parent company of American Airlines iirc) on Monday 9/10? I never heard any more about it. I thought the SEC was looking at it.
New scrutiny of airlines options deals
First two paragraphs:
"The Chicago Board Options Exchange said yesterday that it is looking into an unusual spike in trading in two airline stocks in advance of last week's terrorist attacks.
As reported in The Chronicle, options trading in the stocks of the parent companies of American and United airlines was unusually heavy in the three trading days prior to the attack."