Shares of social media platform Pinterest Inc (NYSE:PINS) were last seen up 3.3% at $38.32, after an upgrade from Morgan Stanley to "overweight" from "equal weight." The firm cited undervalued growth potential and monetization opportunities, hiking its price target to$45 from $37. Today's pop has PINS hitting its highest levels since February. The stock has been on the rise since April, with close support at the 20-day moving average. Since the start of the year, the equity is up 31.4%. The bull note has a ...