Global regulators want rates to be based on observable transactions.

U.K.'s Serious Fraud Office won't confirm, but notes "significant developments" in case.

U.K.'s Serious Fraud Office won't confirm, but notes "significant developments" in case.

Number of Libor reference rates will be slashed by eliminating thinly traded currencies, maturities.

Number of Libor reference rates will be slashed by eliminating thinly traded currencies, maturities.

Bank will pay $453 million; CEO Diamond and other executives to forgo bonuses.