The stock rose $2.11, or about 11 percent, to close Friday at $21.51 on the New York Stock Exchange.
At the New York Stock Exchange, the stock closed on Friday at $21.51, rising close to 11 percent, which is $2.11.
The Securities and Exchange Commission yesterday said companies trading on the biggest U.S. markets must win shareholder approval before granting stock options and other stock-based compensation plans to corporate executives .