"United States Currency" has been upgraded and will become a part of the Whitman Collector Series as the ninth edition of the popular reference goes on sale.

Investors and strategists are pondering whether Trump’s unorthodox ideas to revive US manufacturing will succeed.

While there is a debate to be had about the value and importance of the penny, the discussion has brought attention to another low-value bit of currency: the $2 bill. The $2 bill has been around for ...