WASHINGTON—U.S. regulators on Monday pressed banks to stop using the London interbank offered rate on new transactions by the end of 2021 while backing a plan to allow many existing transactions to mature before Libor fully winds down in June 2023.
The moves amount to the strongest and clearest guidance yet from regulators about the risks to banks for writing new contracts based on Libor, an interest-rate benchmark that global policy makers moved to scrap after concluding it was balky and prone to manipulation.
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