And, when they used to think the company is worth $60/share, and now they think it is worth $28/share, the company has a serious problem.
While we all know US has many serious problems, some flight safety related, but there is another way to look at the situation, that there may simply be other opportunities that people perceive will yield better returns. The price of fuel(and beating war-drums to invade Iran) is one item that most any investor would look at and say, well, maybe I should take my money from the airline industry and go elsewhere, for now. Phd in economics not needed.
For instance, with the recent doubling of foreclosures in many areas, income property is becoming somewhat attractive.
Just another way of looking at the glass half-full, half-empty or glass is too big thingy.