Why Red Robin Gourmet Burgers Jumped 18.4% in September

Shares of Red Robin Gourmet Burgers (NASDAQ: RRGB) rose 18.4% in September, according to data from S&P Global Market Intelligence, after telling investors early in the month its business was improving as comparable sales improved ever so slightly as the weeks progressed.

Although comps were down 21.9% in the week ending Sep. 6, it was better than the 22.1% they were down the week before and the greater than 30% decline they experienced throughout most of August.

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Source Fool.com