U.S. regulators to back more oversight of virtual currencies -testimony

WASHINGTON, Feb 5 (Reuters) - Digital currencies such as bitcoin demand increased oversight and may require a new federal regulatory framework, the top U.S. markets regulators will tell lawmakers at a hotly anticipated congressional hearing on Tuesday.

Christopher Giancarlo, chairman of the Commodity Futures Trading Commission, and Jay Clayton, chairman of the Securities and Exchange Commission, will provide testimony to the Senate Banking Committee amid growing concerns globally over the risks virtual currencies pose to investors and the financial system.

Giancarlo and Clayton will say current state-by-state licensing rules for cryptocurrency exchanges may need to be reviewed in favor of a rationalized federal framework, according to prepared testimony published on Monday. (Reporting by Michelle Price; Editing by Paul Simao)