UK regulator makes 'final call' to switch off Libor

Markets participants have a month to stop using Libor, the tarnished interest rate banks were fined for trying to rig, Britain's Financial Conduct Authority (FCA) said on Wednesday.

The London Interbank Offered Rate (Libor) reflected the cost of lending between banks, using quotes from panels of banks in 35 variants across five currencies.

Most have already been scrapped and remaining dollar quotes end on June 30, replaced by "risk free" rates compiled by central banks like the Federal Reserve in the biggest switch in markets for decades, raising concerns about pricing bank assets during market shocks.


"This is the last remaining Libor panel and its end marks another critical milestone in the transition away from LIBOR," the FCA said in its "final messages" on the rate.

It was once dubbed the world's most important number due to wide use in pricing mortgages, derivatives, credit cards and student loans.

"Firms must continue to actively transition contracts that reference Libor to appropriate, robust reference rates, and we continue to expect firms to deliver demonstrable progress," the FCA said.

Market participants were given permission to continue using dollar Libor in new contracts on a limited basis, but the FCA said on Wednesday this would end on July 1.

The 1, 3 and 6-month dollar Libor rates only will be published in a "synthetic form" for legacy contracts from July 3 to end-September 2024.

"Synthetic Libor settings will not continue simply for the convenience of those who could have transitioned their contracts but have not done so," the FCA said.

Separately, U.S. securities clearing and settlement firm DTCC said it could be challenging for firms to meet the June deadline given there could be over 150,000 legacy contracts that may be impacted and require action.