But the day after American Airlines Flight 5342 collided with a U.S. Army helicopter in Washington, D.C., killing all 67 people onboard, shares of the company were trading just 2.5% lower. The decline grew four days later,

Authorities continue to search for bodies and determine what led to the Wednesday, Jan. 29, midair collision between an American Airlines jet and a U.S. Army Black Hawk helicopter over the Potomac River in the Washington,