The appropriate response of a central banks interest rate policy to banking crises is the subject of a continuing and important debate. A standard view is that monetary policy should play a role only if a financial disruption directly affects inflation or the real economy; monetary policy should not be used to alleviate financial distress per se. Additionally, several studies on interlinkages between monetary policy and financial stability policy recommend the complete separation of the two, with evidence of higher and more volatile inflation rates in countries where the central bank is in charge of banking stability.
This view of monetary policy is challenged by observations that during a banking crisis, interbank interest rates often appear to be a key instrument used by central banks for limiting threats to financial stability. During the recent crisis starting in August 2007, interest rate setting in both the U.S. and the E.U. appeared to be geared heavily toward alleviating stress in the banking system. This also appears to be the case in previous financial disruptions, as Goodfriend (2002) states: Consider the fact that the Fed cut interest rates sharply in response to two of the most serious financial crises in recent years: the October 1987 stock market break and the turmoil following the Russian default in 1998. The practice of reducing interbank rates during financial turmoil also challenges the long debated view originated by Bagehot (1873) that central banks should provide liquidity to banks at high penalty interest rates (see Martin 2009, for example).