Have you been paying attention to shares of Ensign Group (ENSG) ? Shares have been on the move with the stock up 8.1% over the past month. The stock hit a new 52-week high of $153.64 in the previous session. Ensign Group has gained 36.1% since the start of the year compared to the 11.6% move for the Zacks Medical sector and the 31% return for the Zacks Medical - Nursing Homes industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, as it hasn't missed our earni ...