In the latest market close, Groupon (GRPN) reached $9.78, with a -1.81% movement compared to the previous day. This move lagged the S&P 500's daily gain of 0.42%. Elsewhere, the Dow gained 0.04%, while the tech-heavy Nasdaq added 0.38%.Prior to today's trading, shares of the online daily deal service had lost 28.19% over the past month. This has lagged the Retail-Wholesale sector's gain of 6.34% and the S&P 500's gain of 2.06% in that time.Market participants will be closely following the financial results ...