Summary Box: Groupon stock slides

WHAT HAPPENED: Online deals site Groupon Inc. reported a sharp revenue increase for its fourth quarter, its first earnings report as a public company. But its forecast suggested slowing growth. And it reported a loss on an adjusted basis while analysts were expecting a profit.

REACTION: Its shares fell $3.41, or 13.9 percent, to $21.17 on Thursday. After pricing its IPO at $20 in November, Groupon’s stock has fluctuated between $14.85 and $31.14.

ANALYSTS WAITING: So far, analysts don’t suggest selling the stock, just waiting to see whether the company can show it can keep growing quickly.