Yahoo has gone through seven different CEOs since 2006, including current leader Marissa Mayer, trying to figure out how to rejuvenate its growth. Wall Street's exasperation with Yahoo's financial malaise caused the company's stock to sink below $9 in late 2008. The company's stock is now hovering around $43, a level that hasn't been touched since 2006. Most of the comeback occurred during the last two years as investors latched on to Yahoo's stock to profit from Alibaba's success leading up to the IPO. Yahoo now must decide what to do with the money that will pour in from Alibaba's IPO. Mayer has promised that at least half the amount, after taxes, will be returned to shareholders through dividends or, more likely, buying back stock. That leaves open the possibility that Yahoo might use the rest of the money from the Alibaba IPO to help finance an acquisition of another Internet company such as AOL Inc. or a hot startup such as social media company Pinterest in its latest attempt to revive its business.