William Gross, manager of the world's largest bond fund at Pimco, recently wrote that stock and bond valuations are becoming stretched, but not yet at levels where investors should sell the bulk of their portfolios.

WSJ: Stocks Testing Records��But There's Still Room to Run

He and his wife are behind the William and Sue Gross Family Foundation, an annual contributor to Columbia University, Doctors Without Borders and the Smithsonian's National Postal Museum, which is building the 12, 000-square foot William H.

FORBES: Bill Gross