Central banks are on the front lines in the fight to limit the impact of the pandemic. They are supporting virtually every aspect of the economy and the financial system. Combined with the massive fiscal support, these policies restored market stability, safeguarded financial institutions, and reduced suffering. Count us among those who firmly believe that everyone would be in worse shape had central banks and fiscal authorities not coordinated this aid as they did.

But, by providing such a broad backstop, the reliance of financial markets on that support can itself become a source of instability. This raises a set of very important and pressing questions: Have central banks’ actions over the past year made financial markets their masters? Can policymakers now be counted on to suppress financial volatility wherever it arises?

We surely hope not, but we see this as a legitimate concern. Fortunately, we also see a solution. Central bankers should strive to duplicate the success of their framework for interest rate policy. That is, they should be clear and transparent about their reaction function for all their policy tools. Knowing how policy will react, markets will respond directly to news regarding economic conditions, and less to policymakers’ commentary. Of course, central bankers cannot ignore shocks that threaten economic and price stability. But cushioning the economy against large financial disturbances does not mean minimizing market volatility….