Investors Flock Out Of Red Robin Gourmet Burgers By: Benzinga via Benzinga May 17, 2016 at 13:47 PM EDT Red Robin Gourmet Burgers, Inc. (NASDAQ: RRGB) shares are trading lower by $9.30 (15 percent) $52.69 in Tuesday's session. ... Read More >> Related Stocks: Red Robin Gourmet Burgers Inc