Shares of Cardinal Health (CAH) have been strong performers lately, with the stock up 8.6% over the past month. The stock hit a new 52-week high of $127.08 in the previous session. Cardinal Health has gained 7.4% since the start of the year compared to the -3.8% move for the Zacks Medical sector and the 5.1% return for the Zacks Medical - Dental Supplies industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, as it hasn't missed our earnings consensus estimat ...