Groupon Records a 3Q Loss

Groupon had 39.5 million active customers as of the end of September, up 37 percent from a year earlier.

For the current quarter, Groupon is forecasting revenue of $625 million to $675 million. The midpoint of this, $650 million, is higher than the $634.9 million that analysts had expected.

Groupon's stock fell 62 cents, or nearly 16 percent, to $3.30 in after-hours trading Thursday. Groupon's stock made its public debut last November at a price of $20, but it has fallen sharply since amid concerns about the long-term viability of its business model and its ability to grow. The stock ended Thursday's regular-trading session at $3.92 and hit an all-time low of $3.68 a week ago, on Nov. 1.