Everyone thought this stock was going to fly high today due to recent news about their product endpoint success.  It didn't! Stock gapped up in PM but quickly fell at market open and didn't bounce. I held until early afternoon after waiting to see news at their afternoon conference presentation. Apparently the news catalyst wasn't strong enough to push the price back up to the HOD so I sold my position for a very small loss.  Lesson here is don't try to be first.  Let others test the waters first to see if the stock has enough momentum to bounce after a morning drop.  This time it didn't.