According to analysts Yahoo's 24% stake in Alibaba and its stake in Yahoo Japan is what gives its share price momentum. U.S. Yahoo operations are estimated by Topeka Capital Markets to provide only about $10 of Yahoo's value per share. Alibaba's operations as a retailer in China account for $30 of the value per share, and Yahoo Japan $7 per share in value. Yahoo's current share price in Jan 214 is $40, having doubled in the past year. Analysts say there is not much CEO Marissa Mayer can do to reverse the slow decline in Yahoo revenues as it competes with Google, Facebook and other competitors for premium display advertising.