engine - 1:42 pm on Aug 20, 2012 (gmt 0)

I suspect they expected too much from the stock, imho.

Some Stock Investors Not Seeing Anticipated Returns From Groupon [online.wsj.com]

At least four Groupon investors who held stock in the daily-deals company before it went public have sold or significantly pared back their holdings in recent months. Since its initial public offering in November, Groupon has shed more than three-quarters of its stock-market value, or about $10 billion.