I don't believe in them, when I'm in a volatile stock. Today's news was good, really good. Long term, this stock will benefit. But today offered a great short opportunity. Bet against the knee-jerk...look at the percentage gain....that is the clue.
Many, many will REALIZE profits today by selling on the 17% rise. This stick will still end UP today, of course. Just not by such a HUGE margin. Trading 101.