Many experts say reducing mortgage principal can help troubled homeowners stay in their homes. But two of the nation's largest mortgage holders, Fannie Mae and Freddie Mac, have not signed on to the idea. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

A sign for Google is displayed behind the Google android robot, at the National Retail Federation in New York. Google is planning to roll out a new privacy policy Thursday. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP