In the latest market close, Groupon (GRPN) reached $16.74, with a -1.18% movement compared to the previous day. The stock trailed the S&P 500, which registered a daily loss of 0.71%. On the other hand, the Dow registered a loss of 0.93%, and the technology-centric Nasdaq decreased by 0.81%.Heading into today, shares of the online daily deal service had gained 15.63% over the past month, outpacing the Retail-Wholesale sector's loss of 0.03% and the S&P 500's gain of 1.08% in that time.Market participants wil ...