In the latest trading session, Groupon (GRPN) closed at $18.10, marking no change from the previous day. The stock trailed the S&P 500, which registered a daily gain of 0.58%. Elsewhere, the Dow gained 0.75%, while the tech-heavy Nasdaq added 0.55%.Shares of the online daily deal service witnessed a loss of 3.57% over the previous month, trailing the performance of the Retail-Wholesale sector with its loss of 0.19% and the S&P 500's loss of 0.84%.Market participants will be closely following the financial r ...