UPDATE: Piper Jaffray Upgrades Red Robin Gourmet Burgers on Positive Outlook

In a report published Wednesday, Piper Jaffray analyst Nicole Miller Regan upgraded the rating on Red Robin Gourmet Burgers (NASDAQ: RRGB ) from Underweight to Neutral, and raised the price target from $53.00 to $68.00. In the report, Piper Jaffray noted, “We are raising our estimates, rating, and price target