The effect of monetary policy interventions on interbank markets, equity indices and G-SIFIs during financial crisis

• We analyze standard and non-standard monetary policy interventions.
• We adopt an event study approach, considering five monetary areas, over 2007–2012.
• We measure the effect on the interbank market, the stock market, and single G-SIFIs.
• Standard measures were more effective in restoring the interbank market.
• Non-standard measures registered a stronger reaction on equity indices and G-SIFIs.

Since 2007, monetary authorities around the globe have reduced their key policy interest rates to unprecedented low levels and intervened with non-standard policy measures (i.e., monetary easing and liquidity provision) to support funding conditions for banks, enhance lending to the private sector and contain contagion in financial markets (e.g., European Central Bank, 2011). Using a detailed dataset of monetary policy interventions between June 2007 and June 2012 in the most advanced monetary areas (the Euro area, Japan, the U.S., the UK and Switzerland), we analyze their effects at three different levels, including (1) the interbank credit market, considering the 3-month LIBOR-OIS spread as a measure of financial distress (e.g., Taylor and Williams, 2009); (2) the stock market, represented by wide equity indices; and (3) the banking sector, focusing on global systematically important financial institutions (G-SIFIs). We demonstrate that different monetary policy interventions from single central banks have produced a diverse market reaction. Standard measures have been more effective than non-conventional ones in restoring the interbank market, which is fundamental for maintaining a fully operational traditional interest rate channel and for guaranteeing the normal functioning of financial intermediation. Non-traditional measures have registered a stronger stock market reaction with respect to standard interest rate decisions, both in terms of broad equity indices and single prices of large banks.