Have you been paying attention to shares of Arch Capital Group (ACGL) ? Shares have been on the move with the stock up 8.5% over the past month. The stock hit a new 52-week high of $104.72 in the previous session. Arch Capital Group has gained 40.8% since the start of the year compared to the 14% move for the Zacks Finance sector and the 23.8% 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 ...