Libor scandal: Geithner warned UK authorities in 2008

Timothy Geithner Mr Geithner said he was aware of problems with Libor back in 2008

US Treasury Secretary Timothy Geithner has said that he had warned UK authorities about problems with the Libor inter-bank lending rate in 2008.

He told US politicians he had emailed the Bank of England with suggestions on how to solve these issues.

He went on to question whether the British Bankers' Association (BBA), which oversaw the setting of Libor, was the right body for the job.

Concerns about Libor's reliability had also been in the public domain in 2008.

The process banks use to set the benchmark rate at which they lend to each other was discredited following an investigation into Barclays that led to a £290m fine.

There is widespread belief that other banks were also involved in manipulating Libor, which is one of the most important interest rates and is used as the basis for pricing a range of loans and investments.

In testimony to the US House of Representatives, Mr Geithner, who was head of the New York Federal Reserve Bank at the time problems with the Libor rate surfaced in the US, said the BBA, which is a private body, was not strong enough to oversee the setting of Libor.

He likened the BBA to a police force in a small town where the population had multiplied 10 or 100-fold. When that happened, he said, you had to increase the size of the police department.

'Limit risk'

He said he had acted promptly to alert US authorities and the Bank of England: "In the detailed recommendations we gave to the British, we identified a series of specific things that would make it untenable for this rate to be affected by the banks' incentive to lower their reported cost of funds.

"We gave them very specific detailed changes for doing that. If those had been adopted sooner, you would limit this risk going forward."

Governor of the Bank of England Sir Mervyn King recently proposed that central bank governors and regulators should discuss possible reform of Libor at a meeting in September.

Mr Geithner had previously said that reforming Libor must be an international effort.

Sir Mervyn suggested central bankers discuss ideas for reforming Libor in Basel, Switzerland, on 9 September.

Libor is calculated daily in London for the US dollar and other currencies, when banks post estimates of how much it costs them to borrow from each other.

Critics argue that Libor is essentially based on a subjective assessment, and want a system calculated on actual transactions in the market.

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