The "Inverted Jenny," 1918, one of the rarest and most valuable stamps in the world, celebrates the first air mail in the U.S.—by depicting an inadvertently upside-down airplane. Hannah Whitaker ...

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 ...

The “king of hobbies” is changing. Once the domain of hobbyists trying to complete their collections, stamp collecting has shifted to investors seeking individual collectible stamps worth money. With ...

A good investment is one which delivers an attractive rate of return over a long period of time, much like one’s home. Since the universe of postage stamps numbers over one million, one needs to make ...

In a decidedly digital age, the modest postage stamp seems to be slowly vanishing from daily life—no longer ubiquitous in wallets or pocketbooks, useful but maybe not essential. They’re so overlooked ...