Pinterest downgraded, Tractor Supply upgraded: Wall Street's top analyst calls

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: Citi double upgraded IPG Photonics (IPGP) to Buy from Sell with a price target of $105, up from $68, following the Q3 report. The firm sees the company's business recovery in Q3 continuing due to improving demand for welding and micromachining. IPG posted positive revenue growth year-over-year after 12 consecutive ...