Over the past several weeks in response to the COVID-19-induced global economic shutdown, the U.S. Federal Reserve has announced an unprecedented number of operations to relieve or bail out various markets, as the lender of last resort.
Eric Basmajian provided a solid breakdown of the operations in place as of a couple of weeks ago, and that article is certainly worth a read. The Fed has expanded the monetary base to buy Treasuries and other securities at a record pace, has put in place various lending facilities, and has opened a record number of currency