Groupon (GRPN) closed the most recent trading day at $10.90, moving +1.63% from the previous trading session. The stock's performance was ahead of the S&P 500's daily gain of 0.74%.Heading into today, shares of the online daily deal service had gained 3.67% over the past month, outpacing the Retail-Wholesale sector's gain of 3.49% and the S&P 500's gain of 3.16% in that time.Investors will be eagerly watching for the performance of Groupon in its upcoming earnings disclosure. The company's earnings report i ...