Shares of Coherent (COHR) have been strong performers lately, with the stock up 5.2% over the past month. The stock hit a new 52-week high of $111.66 in the previous session. Coherent has gained 152.7% since the start of the year compared to the 27.5% move for the Zacks Business Services sector and the 52.7% return for the Zacks Technology 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 estimate in a ...