LIBOR Rigging

July 5th, 2012

LIBOR (the London inter-bank offered rate) scandal that involves Barclays, a 300-year-old British bank, is beginning to assume global significance. Over the past weeks damning evidence has emerged, in documents detailing a settlement between Barclays and regulators in America and Britain that employees at the bank and at several other unnamed banks tried to rig the number time and again over a period of at least five years. And worse is likely to emerge. Investigations by regulators in several countries, including Canada, America, Japan, the EU, Switzerland and Britain, are looking into allegations that LIBOR and similar rates were rigged by large numbers of banks.

The LIBOR that the traders were toying with determines the prices that people and corporations around the world pay for loans or receive for their savings. It is used as a benchmark to set payments on about $800 trillion-worth of financial instruments, ranging from complex interest-rate derivatives to simple mortgages. The number determines the global flow of billions of dollars each year. Yet it turns out to have been flawed.

On July 3rd, Barclays PLC Chief Executive Robert Diamond caved in to intense pressure to quit after the U.K. bank became embroiled in a bitter political row over its role in the Libor rate-rigging scandal. Robert Diamond resigned amid a deepening dispute about whether the Bank of England pushed the lender to submit artificially low Libor rates during the financial crisis.

As many as 20 big banks have been named in various investigations or lawsuits alleging that LIBOR was rigged. The scandal also corrodes further what little remains of public trust in banks and those who run them.

Like many of the City’s ways, LIBOR is something of an anachronism, a throwback to a time when many bankers within the Square Mile knew one another and when trust was more important than contract. For LIBOR, a borrowing rate is set daily by a panel of banks for ten currencies and for 15 maturities. The most important of these, three-month dollar LIBOR, is supposed to indicate what a bank would pay to borrow dollars for three months from other banks at 11am on the day it is set. The dollar rate is fixed each day by taking estimates from a panel, currently comprising 18 banks, of what they think they would have to pay to borrow if they needed money. The top four and bottom four estimates are then discarded, and LIBOR is the average of those left. The submissions of all the participants are published, along with each day’s LIBOR fix.

In theory, LIBOR is supposed to be a pretty honest number because it is assumed, for a start, that banks play by the rules and give truthful estimates. The market is also sufficiently small that most banks are presumed to know what the others are doing. In reality, the system is rotten. 

First, it is based on banks’ estimates, rather than the actual prices at which banks have lent to or borrowed from one another. 

A second problem is that those involved in setting the rates have often had every incentive to lie, since their banks stood to profit or lose money depending on the level at which LIBOR was set each day. Worse still, transparency in the mechanism of setting rates may well have exacerbated the tendency to lie, rather than suppressed it. Banks that were weak would not have wanted to signal that fact widely in markets by submitting honest estimates of the high price they would have to pay to borrow, if they could borrow at all.

In the case of Barclays, two very different sorts of rate fiddling have emerged. The first sort, and the one that has raised the most ire, involved groups of derivatives traders at Barclays and several other unnamed banks trying to influence the final LIBOR fixing to increase profits (or reduce losses) on their derivative exposures. The sums involved might have been huge. Barclays was a leading trader of these sorts of derivatives, and even relatively small moves in the final value of LIBOR could have resulted in daily profits or losses worth millions of dollars. In 2007, for instance, the loss (or gain) that Barclays stood to make from normal moves in interest rates over any given day was $40m at the time. In settlements with the Financial Services Authority (FSA) in Britain and America’s Department of Justice, Barclays accepted that its traders had manipulated rates on hundreds of occasions. 

Barclays has tried its best to present these incidents as the actions of a few rogue traders. Yet the brazenness with which employees on various Barclays trading floors colluded, both with one another and with traders from other banks, suggests that this sort of behavior was, if not widespread, at least widely tolerated.

Yet a second sort of LIBOR-rigging has also emerged in the Barclays settlement. Barclays and, apparently, many other banks submitted dishonestly low estimates of bank borrowing costs over at least two years, including during the depths of the financial crisis. In terms of the scale of manipulation, this appears to have been far more egregious—at least in terms of the numbers. Almost all the banks in the LIBOR panels were submitting rates that may have been 30-40 basis points too low on average.

As the financial crisis began in the middle of 2007, credit markets for banks started to freeze up. Banks began to suffer losses on their holdings of toxic securities relating to American subprime mortgages. With unexploded bombs littering the banking system, banks were reluctant to lend to one another, leading to shortages of funding system-wide. This only intensified in late 2007 when Northern Rock, a British mortgage lender, experienced a bank run that started in the money markets. It soon had to be taken over by the state. In these febrile market conditions, with almost no interbank lending taking place, there were little real data to use as a basis when submitting LIBOR. Barclays maintains that it tried to post honest assessments in its LIBOR submissions, but found that it was constantly above the submissions of rival banks, including some that were unmistakably weaker.

In its settlement with regulators, Barclays owned up to massaging down its own LIBOR submissions so that they were more or less in line with those of their rivals. It instructed its money-markets team to submit numbers that were high enough to be in the top four, and thus discarded from the calculation, but not so high as to draw attention to the bank.

There is possibility that these vital markets may have been rigged by a large number of banks. The list of institutions that have said they are either co-operating with investigations or being questioned includes many of the world’s biggest banks. Among those that have disclosed their involvement are Citigroup, Deutsche Bank, HSBC, JPMorgan Chase, RBS and UBS.

Investigators are unlikely to produce new evidence against other banks for a few months yet. Slower still will be the progress of civil claims. Actions representing a huge variety of plaintiffs have been launched. Among the claimants are investors in savings rates or bonds linked to LIBOR, those buying derivatives priced off it, and those who dealt directly with banks involved in setting LIBOR.

The extent of the banks’ liability may well depend on whether regulators press them to pay compensation or, conversely, offer banks some protection because of worries that the sums involved may be so large as to need yet more bail-outs, according to one senior London lawyer.

A particular worry for banks is that they face an asymmetric risk because they stand in the middle of many transactions. For each of their clients who may have lost out if LIBOR was manipulated, another will probably have gained. Yet banks will be sued only by those who have lost, and will be unable to claim back the unjust gains made by some of their other customers. Lawyers acting for corporations or other banks say their clients are also considering whether they can walk away from contracts with banks such as long-term derivatives priced off LIBOR.