Shares of Assurant (AIZ) have been strong performers lately, with the stock up 11.4% over the past month. The stock hit a new 52-week high of $189.77 in the previous session. Assurant has gained 12% since the start of the year compared to the 14.4% move for the Zacks Finance sector and the 10.9% 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 estimate in any o ...