Over the past two weeks, the Federal Reserve has resurrected many of the policy tools that took many months to develop during the Great Financial Crisis of 2007-09 and several years to refine during the post-crisis recovery. The Fed was then learning through trial and error how to serve as an effective lender of last resort (see Tucker) and how to deploy the “new monetary policy tools” that are now part of central banks’ standard weaponry.

The good news is that the Fed’s crisis management muscles remain strong. The bad news is that the challenges of the Corona War are unprecedented. Success will require extraordinary creativity and flexibility from every part of the government. As in any war, the central bank needs to find additional ways to support the government’s efforts to steady the economy. A key challenge is to do so in a manner that allows for a smooth return to “peacetime” policy practices when the war is past.

In this post, we review the rationale for reintroducing the resurrected policy tools, distinguishing between those intended to restore market function or substitute for private intermediation, and those meant to alter financial conditions to support aggregate demand….