The most talked about and market moving research calls around Wall Street are now in one place. Here are today's research calls that investors need to know, as compiled by The Fly.Top 5 Upgrades: Morgan Stanley upgraded Rollins (ROL) to Overweight from Equal Weight with a price target of $72, up from$58. The firm says the company is a "best-in-class" operator with durable demand drivers, a resilient end market, and structural tailwinds.DA Davidson upgraded Guidewire (GWRE) to Buy from Neutral with an unch ...