The Fed's total balance sheet size exploded by more than half a trillion dollars in a single week, roughly twice the pace of the next-largest weekly expansion in the financial crisis in October 2008. As of Wednesday, the Fed's stash of assets totaled $5.3 trillion, according to data released on Thursday.
The Fed bought $355 billion of Treasuries and mortgage-backed bonds in the last week in what is now an open-ended commitment to stabilize financial markets rocked by the outbreak and the halt in economic activity that has come in its wake.
It also offered more than $200 billion in credit through so-called foreign currency swap lines to other central banks to allow them to pump much-needed greenbacks into their jurisdictions to help foreign borrowers stay current with their dollar-denominated liabilities.
The weekly snapshot of the Fed's balance sheet, released each Thursday, also showed sizable demand for a pair of brand new liquidity facilities aimed at stabilizing money markets and supporting primary dealers, the banks that transact directly with the central bank.