CVA - Covanta double downgraded at Stifel on price collapse April, 15 2020 09:09 AM Covanta Holding Corporation Covanta (NYSE:CVA) -13.2% pre-market as Stifel double downgrades shares to Sell from Buy with a Street-low price target of $6.50.More news on: Covanta Holding Corporation, Commodities news, Stocks on the move, Read more ...