Shares of Iamgold (IAG) have been strong performers lately, with the stock up 6.7% over the past month. The stock hit a new 52-week high of $5.49 in the previous session. Iamgold has gained 114.2% since the start of the year compared to the -4.2% move for the Zacks Basic Materials sector and the 28.6% return for the Zacks Mining - Gold industry. What's Driving the Outperformance? The stock has an impressive record of positive earnings surprises, as it hasn't missed our earnings consensus estimate in any of ...