Normal 0 false false false MicrosoftInternetExplorer4 Groupon (NASDAQ: GRPN) added 10.4% to $3.43 in the first hour of trading. Hedge fund Tiger Global bought a 9.9% stake in Groupon. Share volume was 7.5 million, compared to an all-day average of 28.1 million /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}