Have you been paying attention to shares of Sterling Infrastructure (STRL) ? Shares have been on the move with the stock up 17.5% over the past month. The stock hit a new 52-week high of $139.28 in the previous session. Sterling Infrastructure has gained 53.5% since the start of the year compared to the 21.2% move for the Zacks Construction sector and the 30.2% return for the Zacks Engineering - R and D Services industry.What's Driving the Outperformance?The stock has a great record of positive earnings sur ...