Have you been paying attention to shares of Amkor Technology (AMKR) ? Shares have been on the move with the stock up 22.2% over the past month. The stock hit a new 52-week high of $40.58 in the previous session. Amkor Technology has gained 20.5% since the start of the year compared to the 26.1% move for the Zacks Computer and Technology sector and the 34.8% return for the Zacks Electronics - Semiconductors industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises ...