London Interbank Offered Rate (LIBOR)

The London Interbank Offered Rate (LIBOR) is the primary rate that major banks charge each other for loans of maturities not greater than 1 year. Banks make loans to each other because they are legally required to have a certain percentage on hand compared to their liabilities, and since this fluctuates daily with their business, they sometimes have surpluses to lend out or they have deficits that are usually eliminated by borrowing from banks with surpluses. Since most of these loans are for less than 1 year, and the interbank market for longer maturities is illiquid, and, therefore, difficult to price, the LIBOR excludes maturities greater than 1 year.

The LIBOR is also the rate used to settle many futures and option contracts involving interest rates.

The LIBOR actually signifies several rates that are calculated in 10 different currencies and is set every business day at 11 A.M. London time by the British Bankers’ Association (BBA) by using data from contributor banks for each currency, including:

A panel of 8 to 16 different contributor banks are chosen for each of the 10 currencies for which LIBOR rates are provided. Contributor banks are selected annually, and are chosen based on the amount of business conducted in a specific currency, their reputation, and on their creditworthiness. Some banks, especially the large international banks like the ones listed above, are contributors for more than 1 currency.

The rates for the different currencies are determined only by the reports from the panels—there is no currency conversion to reconcile the rates between the different currencies. LIBOR is calculated for the following currencies:

The LIBOR was 1^st published in its current form in January 1, 1986 by the BBA, but began as a list of interest rates quoted by 4 banks for the United States dollar in the 1970s to serve as a basis for setting the interest rates for floating rate notes and syndicated loans outside the United States. The major impetus for calculating and publishing the LIBOR was to serve as a benchmark to settle contracts based on interest rates, including forward rate agreements, interest rate swaps, and foreign currency options.

The LIBOR for a particular currency is most depended on the local interest rate for the currency, such as the Feds Fund rate for the United States dollar, but is also depended on the contributor banks' expectation of future rates, the profiles of the banks consulted, and the liquidity of the currency in the London cash market.

The current method of calculating the average, rounded to 5 decimal places, averages only the quotes within the 2nd and 3rd quartiles from each panel of contributing banks; the top and bottom quartiles are disregarded to eliminate distortions due to outliers, or due to misinformation, which sometimes occurs when a bank reports a rate for borrowing that is lower than the actual rate to hide its financial difficulties. (A bank perceived to be in financial stress would be charged a higher rate than other banks.)

Most of the rates are calculated on an actual/360 basis except for the British pound (GBP), which is calculated on an actual/365 basis. The following formula calculates the interest due:

Interest Due = Principal x (LIBOR/100) x (Actual Number of Days in Interest Period)/360 (Note: 365 for GBP)

Since the LIBOR is not set, but rather is a reported average of what large banks have been charging and paying each other in recent transactions, no government or any of their agencies, including their central banks, has any direct control over the LIBOR rate. During the credit freeze of September 2008, banks were reporting their opinions since there was little interbank lending to go on. Banks were afraid to lend to other banks because lenders didn't know which banks were holding toxic subprime mortgages or derivatives based on subprime mortgages, and which banks had sold credit default protection through credit default swaps to holders of toxic assets, which is what led to the credit crisis.

Many financial contracts and variable interest rates are pegged to the LIBOR, which, on December 31, 2007 had a notional principal of $393 trillion (USD). Many corporate loans are based on the 3-month LIBOR and half of all subprime mortgages issued 2004 – 2006 had adjustable rates pegged to the LIBOR. Hence, when the LIBOR jumps, as it does in any general credit event affecting banks, the cost of loans increases significantly for both businesses and consumers, which limits both capital and consumer spending, potentially driving economies into a recession. For instance, the LIBOR jumped when Bear Stearns collapsed on March 17, 2008, and during the several credit events that occurred in September 2008, such as when Lehman Brothers declared bankruptcy on September 15, 2008. Many banks also suffered major losses when Freddie Mac and Fannie Mae were taken over by the government, reducing the value of the banks' stock in these corporations to near zero, which further increased the risk of interbank lending, and therefore the LIBOR.

Although the LIBOR is not set by the central banks, the interest rates set by the central banks do affect the LIBOR, which generally move together unless credit events involving banks causes them to diverge. Thus, the LIBOR remained high even as central banks were lowering their rates during the Credit Crisis in October 2008.

London Interbank Offered Rate (LIBOR)

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