America’s most valuable postage stamp sold for nearly $4.4 million on Friday. The 1868 one-cent "Z" Grill was sold as part of the collection owned by "Bond King" Bill Gross, who co-founded asset ...

As a child, billionaire investor Bill Gross received a set of stamps from his mother, who believed the album could pay for his college. The stamps turned out to be worthless, but Gross ...