Have you been paying attention to shares of Innospec (IOSP) ? Shares have been on the move with the stock up 7% over the past month. The stock hit a new 52-week high of $133.71 in the previous session. Innospec has gained 6.5% since the start of the year compared to the -0.3% move for the Zacks Basic Materials sector and the 1.3% return for the Zacks Chemical - Diversified industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't missed our ea ...