> In the modern financial system, risk-free debt is basically as good as cash on a balance sheet. If you need to turn it into cash, you just dip into the repo (“repurchase agreement”) market.
The global repo market is valued at $12T USD, and only 75% of it is backed by "pristine collateral", such as government bonds. That means that $3T of it is in equities or derivatives. The fed's balance sheet is only $4T USD in comparison. Additionally, $.5T is in private capital groups, which are entirely opaque, have poor lending standards, and there's no visibility into counterparties or volume.
Keep in mind, India's Yes bank that was just nationalized failed due to liquidity problems. There is a theory that global liquidity is being challenged, and central banks may not have the appetite to provide a backstop at the volume required.