Have you been paying attention to shares of AerCap (AER) ? Shares have been on the move with the stock up 5.8% over the past month. The stock hit a new 52-week high of $93.71 in the previous session. AerCap has gained 24.7% since the start of the year compared to the 4.1% move for the Zacks Finance sector and the 16.8% return for the Zacks Financial - Leasing Companies industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't missed our earnin ...