SAN FRANCISCO — Marissa Mayer’s nearly four-year attempt to turn around Yahoo needs a turnaround itself, repeating a pattern of futility that has hobbled one of the Internet’s best-known companies for the past decade.

Like her predecessors as Yahoo CEO, Mayer has been unable to snap the company out of a financial funk despite spending billions on acquisitions and new projects. Yahoo’s stock has sunk by 35 percent so far this year as investors’ frustration with the follies have mounted, spurring calls for her replacement.

“This is like an ’emperor has no clothes’ situation,” says Eric Jackson, a Yahoo shareholder and managing director of the New York hedge fund Ader Investment Management. “The company and the shareholders would be better served with her leaving.”

Read the article “For Yahoo CEO Marissa Mayer, the Clock is Ticking” on cbsnews.com.