Have you been paying attention to shares of Packaging Corp. (PKG) ? Shares have been on the move with the stock up 3.3% over the past month. The stock hit a new 52-week high of $191.39 in the previous session. Packaging Corp. has gained 16.5% since the start of the year compared to the 4.8% move for the Zacks Industrial Products sector and the 7.1% return for the Zacks Containers - Paper and Packaging industry. What's Driving the Outperformance? The stock has a great record of positive earnings surprises, a ...