In early August 2007, amidst declining prices and credit ratings for U.S. mortgage-backed securities and other forms of structured credit, international money markets came under severe stress. Short-term funding rates in the interbank market rose sharply relative to yields on comparable-maturity government securities. For example, the three-month U.S. dollar London interbank offered rate (LIBOR) jumped from only 20 basis points higher than the three month U.S. Treasury yield during the first seven months of 2007 to over 110 basis points higher during the final five months of the year. This enlarged spread was also remarkable for persisting into 2008.
LIBOR rates are widely used as reference rates in financial instruments, including derivatives contracts, variable-rate home mortgages, and corporate notes, so their unusually high levels in 2007 and 2008 appeared likely to have widespread adverse financial and macroeconomic repercussions. To limit these adverse effects, central banks around the world established an extraordinary set of lending facilities that were intended to increase financial market liquidity and ease strains in term interbank funding markets, especially at maturities of a few months or more. Monetary policy operations typically focus on an overnight or very short-term interbank lending rate. However, on December 12, 2007, the Bank of Canada, the Bank of England, the European Central Bank (ECB), the Federal Reserve, and the Swiss National Bank jointly announced a set of measures designed to address elevated pressures in term funding markets. These measures included foreign exchange swap lines established between the Federal Reserve and the ECB and the Swiss National Bank to provide U.S. dollar funding in Europe. The Federal Reserve also announced a new Term Auction Facility, or TAF, to provide depository institutions with a source of term funding. The TAF term loans were secured with various forms of collateral and distributed through an auction.