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It is easy to understand how money gets destroyed in a traditional bank run. Picture the men in top hats yelling at clerks in “Mary Poppins”. The crowds want their cash and bank tellers are trying to provide it. But when customers flee, staff cannot satisfy all comers before the institution topples. The remaining debts (which, for banks, include deposits) are wiped out.
This is not what happens in the digital age. The depositors fleeing Silicon Valley Bank (svb) did not ask for notes and coins. They wanted their balances wired elsewhere. Nor were deposits written off when the bank went under. Instead, regulators promised to make svb’s clients whole. Although the failure of the institution was bad news for shareholders, it should not have reduced the aggregate amount of deposits in the banking system.
The odd thing is that deposits in American banks are nevertheless falling. Over the past year those in commercial banks have sunk by half a trillion dollars, a fall of nearly 3%. This makes the financial system more fragile, since banks must shrink to repay their deposits. Where is the money going?
The answer begins with money-market funds, low-risk investment vehicles that park money in short-term government and corporate debt. Such funds, which yield only slightly more than a bank account, saw inflows of $121bn last week as svb failed. According to the Investment Company Institute, an industry outfit, in March they had $5.3trn of assets, up from $5.1trn a year before.
But money does not actually flow into these funds, for they are unable to take deposits. Instead, cash leaving a bank for a money-market fund is credited to the fund’s bank account, from which it is used to purchase the commercial paper or short-term debt in which the fund wants to invest. When the fund uses the cash in this way, it then flows into the bank account of whichever institution sells the asset. Inflows to money-market funds should thus shuffle deposits around the banking system, not force them out.
And that is what used to happen. Yet there is one new way in which money-market funds may suck deposits from the banking system: the Federal Reserve’s reverse-repo facility, which was introduced in 2013. The scheme was a seemingly innocuous change to the financial system’s plumbing that may, just under a decade later, be having a profoundly destabilising impact on banks.
>https://www.economist.com/finance-and-economics/2023/03/21/americas-banks-are-missing-hundreds-of-billions-of-dollars
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