New standards approved, requiring big foreign banks to increase capital held in the U.S. Borrowing costs may rise as a result.

Challenges to Volcker Rule revolve around its broad definition of ownership of a hedge or private-equity fund.

Challenges to Volcker Rule revolve around its broad definition of ownership of a hedge or private-equity fund.

Failure to pay government debt could hit stock markets worldwide and inflate borrowing costs.

Only one of the six biggest banks already meets the capital requirement that insiders say U.S. regulators are considering.

Cyprus will be the first country without its own currency to impose such controls.

Cyprus will be the first country without its own currency to impose such controls.

Global banking regulations complexity undermines bank safety.