Jefferies Downgrades Tesaro Following 108% Stock Move By: Benzinga via Benzinga June 30, 2016 at 13:11 PM EDT Jefferies has downgraded TESARO Inc (NASDAQ: TSRO) to Hold from Buy after the stock climbed 108 percent Wednesday on positive Phase3 ... Read More >> Related Stocks: Astrazeneca Plc ADR Tesaro Inc