Shares of MGIC Investment (MTG) have been strong performers lately, with the stock up 9.6% over the past month. The stock hit a new 52-week high of $22.68 in the previous session. MGIC Investment has gained 16.2% since the start of the year compared to the 11.3% move for the Zacks Finance sector and the 11.1% return for the Zacks Insurance - Multi line industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't missed our earnings consensus est ...