Rosetta Stone ends up 40 percent, best debut in a year

By Phil Wahba
NEW YORK (Reuters) - Rosetta Stone Inc (NYSE:RST) shares finished their first day of trading up nearly 40 percent Thursday, following the company's initial public offering, making it the strongest start of a new stock in nearly a year.

Rosetta Stone, which provides language instruction products, opened trading at $25, on the morning after it priced its IPO at $18, exceeding the estimate range.