On September 19, 2001, CBS reported:
Sources tell CBS News that the afternoon before the attack, alarm bells were sounding over unusual trading in the U.S. stock options market.
An extraordinary number of trades were betting that American Airlines stock price would fall.
The trades are called “puts” and they involved at least 450,000 shares of American. But what raised the red flag is more than 80 percent of the orders were “puts”, far outnumbering “call” options, those betting the stock would rise.
Sources say they have never seen that kind of imbalance before, reports CBS News Correspondent Sharyl Attkisson. Normally the numbers are fairly even.
After the terrorist attacks, American Airline stock price did fall obviously by 39 percent, and according to sources, that translated into well over $5 million total profit for the person or persons who bet the stock would fall.
At least one Wall Street firm reported their suspicions about this activity to the SEC shortly after the attack.