Have you been paying attention to shares of Tenet Healthcare (THC) ? Shares have been on the move with the stock up 13.5% over the past month. The stock hit a new 52-week high of $134.89 in the previous session. Tenet Healthcare has gained 74.1% since the start of the year compared to the 2.5% move for the Zacks Medical sector and the 20.8% return for the Zacks Medical - Hospital industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't missed ...