Rosetta Stone Inc. (RST) soars to higher than anticipated levels in IPO.  An IPO is an initial public offering of stock.  Rosetta Stone's IPO was priced at $18 per share and it opened at $25... an instant gain of 42 percent for original shareholders. 

Rosetta Stone provides language instruction services in 31 languages through CD-ROMs for both businesses and individuals. You've probably seen their television ad campaign that features US Olympic swimmer Michael Phelps. Makes me want to learn Chinese. Hopefully Phelps had some options for shares at the IPO price... I don't think anyone's mad about 42 percent gains in one day.  He won't be getting that kind of return on his gold medals... the price of gold is relatively flat for the year.  Read more here.