SunTrust Robinson Humphrey Upgrades Monro Muffler Brake To Buy By: Benzinga via Benzinga March 18, 2015 at 08:50 AM EDT SunTrust Robinson Humphrey upgraded Monro Muffler Brake Inc. (NASDAQ: MNRO) from Neutral to Buy. The price target for Monro Muffler ... Read More >> Related Stocks: Monro Muffler Brak