A strong stock as of late has been Labcorp Holdings (LH) . Shares have been marching higher, with the stock up 0.5% over the past month. The stock hit a new 52-week high of $283.47 in the previous session. Labcorp has gained 22.1% since the start of the year compared to the -2% move for the Zacks Medical sector and the -0.6% return for the Zacks Medical Services industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, as it hasn't missed our earnings consensus ...