Central bank liquidity provision This brings me to the second factor, namely central bank liquidity provision, which influences the effective pass-through of monetary policy decisions to money market rates and financing conditions more broadly. The relation between excess liquidity and overnight money market rate dispersion has also changed since the global financial crisis. Prior to 2015, higher levels of excess liquidity tended to lower the dispersion of money market rates (Slide 6). After 2015, increases in dispersion also occurred in periods of ample and rising excess liquidity. https://www.ecb.europa.eu/press/key/date/2020/html/ecb.sp201123~8d9573b1b1.en.html  3/7  24/11/2020  Shifting tides in euro area money markets: from the global financial crisis to the COVID-19 pandemic  There are several reasons for this changing relationship. Prior to 2015, central bank liquidity provision and the associated Eurosystem balance sheet expansion were driven by the need to restore an impaired monetary policy transmission mechanism, caused by heightened market stress during the financial and sovereign debt crises. During the global financial crisis, when the unsecured interbank market came under stress, banks turned to the central bank to obtain liquidity. The Eurosystem essentially assumed the liquidity-providing role of the private market. During the sovereign debt crisis in the euro area, banks once again increased their demand for central bank liquidity. The provision of central bank liquidity also stimulated the supply of liquidity in the private market, especially to banks located in the periphery. [16] The optimal design of central bank liquidity policies is an important research question, which is examined in the conference paper by Robatto (2020).
However, given how truly badly we are doing in meeting our employment mandate, I argue that the Fed should seriously consider actions that would add very significant amounts of policy accommodation. Such further policy accommodation does increase the risk that inflation could rise temporarily above our long-term goal of 2%. But I do not think that a temporary period of inflation above 2% is something to regard with horror. I do not see our 2% goal as a cap on inflation. Rather, it is a goal for the average rate of inflation over some period of time. To average 2%, inflation could be above 2% in some periods and below 2% in others. If a 2% goal was meant to be a cap on inflation, then policy would result in inflation averaging below 2% over time. I do not think this would be a good implementation of a 2% goal.1 With this in mind, I want to discuss the nature of policy-making under a dual mandate when we are far from our goals. What’s a central banker to do? (Warning: math ahead) Normally, the deviations of the real economy and inflation from our objectives are small enough that any conflicts are minor. And the well-known Taylor Rule captures normal policy adjustments well, appropriately weighting output gaps and inflation deviations in the setting of our policy rate.