Shares of Elbit Systems (ESLT) have been strong performers lately, with the stock up 7.2% over the past month. The stock hit a new 52-week high of $511.12 in the previous session. Elbit has gained 97.5% since the start of the year compared to the 33.3% gain for the Zacks Aerospace sector and the 30.8% return for the Zacks Aerospace - Defense Equipment 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 i ...