Have you been paying attention to shares of Arch Capital Group (ACGL) ? Shares have been on the move with the stock up 4% over the past month. The stock hit a new 52-week high of $115.03 in the previous session. Arch Capital Group has gained 54.7% since the start of the year compared to the 18.1% move for the Zacks Finance sector and the 29.1% return for the Zacks Insurance - Property and Casualty industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, as it h ...