So I finally decided to do the research. And folks, it's scarier than you could possibly imagine.
First, the boring fine print:
"Reserve requirements are central bank regulations that set the minimum amount that a commercial bank must hold in liquid assets. This minimum amount, commonly referred to as the commercial bank's reserve, is generally determined by the central bank on the basis of a specified proportion of deposit liabilities of the bank. This rate is commonly referred to as the cash reserve ratio or shortened as reserve ratio. Though the definitions vary, the commercial bank's reserves normally consist of cash held by the bank and stored physically in the bank vault (vault cash), plus the amount of the bank's balance in that bank's account with the central bank. A bank is at liberty to hold in reserve sums above this minimum requirement, commonly referred to as excess reserves."
Every country has different laws to deal with this minimum.
So, guess what the reserve requirements are for the United States? Anyone? Anyone?
ZERO!
That's right. Absolute zero. Banks in America do not need to keep even one penny in liquid assets.
It didn't used to be that way: "The United States removed reserve requirements for nonpersonal time deposits and eurocurrency liabilities on Dec 27, 1990 and for net transaction accounts on March 27, 2020, thus eliminating reserve requirements altogether. Before that, the Board of Governors of the Federal Reserve System used to set reserve requirements (“liquidity ratio”) based on categories of deposit liabilities ("Net Transaction Accounts" or "NTAs") of depository institutions, such as commercial banks including U.S. branches of a foreign bank, savings and loan association, savings bank, and credit union. For a time, checking accounts were subject to reserve requirements, whereas there was no reserve requirement on savings accounts and time deposit accounts of individuals. The Board for some time set a zero reserve requirement for banks with eligible deposits up to $16 million, 3% for banks up to $122.3 million, and 10% thereafter. The total removal of reserve requirements followed the Federal Reserve's shift to an "ample-reserves" system, in which the Federal Reserve Banks pay member banks interest on excess reserves held by them."
Ergo, just the mention of getting rid of the FDIC would completely wipe out this country.