Have you been paying attention to shares of Pinterest (PINS) ? Shares have been on the move with the stock up 20.9% over the past month. The stock hit a new 52-week high of $42.09 in the previous session. Pinterest has gained 13.1% since the start of the year compared to the 12.6% move for the Zacks Computer and Technology sector and the 12.2% return for the Zacks Internet - Software industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't mi ...