[seanhunter]

Banks aren't at all like a supposedly pegged cryptocurrency. Secondly banks don't have a 0% reserve requirement against all types of RWA. They have specifically low reserve requirements against certain types of assets but if you look at the balance sheet of a bank you'll see that their capital reserves are not zero. The Fed removed the reserve requirement on eligible deposits and moved to the "ample reserves" system where they pay interest on reserves that depositary institutions lodge with them but which a specific reserve requirement against liabilities is not needed.

Banks are still required to have reserves against risk-weighted assets (remember that deposits are a liability) and to cover liquidity and macroprudential risk. Here's the fed policy note https://www.federalreserve.gov/monetarypolicy/reservereq.htm and here's an explanation of the "ample reserves" system https://www.federalreserve.gov/econres/notes/feds-notes/impl...