A high volume of "Puts" (bets to fail) are taken out against stocks that would drop after the attacks on 9/11. There was a spike in "Call" (bets to win) options placed on defense contractors like Raytheon, who would supply tomahawk missiles afterward. (aug 20, 2001 – sep 10, 2001)
Added to timeline:
Date:
aug 20, 2001
sep 10, 2001
~ 21 days