It's not really a daily price thing at this point. If you shorted FB from the beginning and got out in the 20s or teens, sure you made a lot of money. But since it bottomed out (with plenty of people still calling for shorting), it rose to $31 before it started another sustained flat/downward trend. If you've had it short for the past two months, you're position is hurting quite a bit. I haven't seen a lot of evidence that a FB short is a good idea since it first IPO'd.