Yellen to unveil first U.S. currency with her signature

Read MoreJanet Yellen is set to unveil the first U.S. currency bearing her signature, marking the first time that U.S. bank notes will bear the name of a female treasury secretary.Janet Yellen is set to unveil the first U.S. currency bearing her signature, marking the first time that U.S. bank notes will bear the name of a female treasury secretary.