After dropping more than 6% on Wednesday, Universal Health Services, Inc. (NYSE:UHS) is trading marginally higher on Thursday. The drop came after Bank of America said it remains cautious on hospitals.  • What’s driving UHS up?Universal Health is the Stock of the Day. It is both oversold and at support; these could be bullish dynamics that could suggest a move higher.Many trading strategies and methods are built around the concept of reversion to the mean. If something goes too far in one direction, there i ...