Stable Coins

Digitizing our bank deposits (digital dollars—stable coins) would (will) represent another step forward in the ease and efficiency with which we can make payments and will enhance bank stability. Most of the US supply of money (US dollars) is in the form of our dollar deposits at our banks and most of our payments these days are already made by electronically transferring bank deposits from me to you via my bank to yours. I have discussed all of this in more detail earlier: “Econ 101-Money”

Developing the rails for paying with stable coins is a further improvement on our existing payment options. It is not revolutionary. The payment of cash (currency) requires no infrastructure (e.g. Merchant contract with credit card issuer and card reader, etc.). You just hand it over and anyone can accept it (hopefully the person you intended to receive it). The electronic transfer of a bank deposit balance (e.g., Zelle, Venmo, e-wire) requires the enrollment of the recipient in that particular payment vehicle.  It took decades for credit cards to be widely accepted. Hundreds of companies now issue Visa cards (mine is issued by United Airlines) and all are accepted wherever any of them are accepted. But it took a lot of work to build that system.

What do stable coins issued by banks add that might be useful? From the bank side issuing stable coins from deposit balances simplifies the bank’s management of the assets that back them. When its customers withdraw cash these days, the bank must purchase it from the Federal Reserve in order to pass it on to you. It pays the Fed for the cash from its reserve deposits at the Fed, which reduces its ability to extend credit to businesses and households. If its reserves at the Fed are not sufficient, it will need to borrow from another bank or sell another asset.

The withdrawal of cash from bank deposits tends to follow seasonal patters. Thus the squeeze on its reserves at the Fed would tend to create seasonal fluctuations in bank credit hence in the money supply.  Thus the Fed attempts to offset the impact of currency fluctuations on bank reserves and thus credit with offsetting purchases and sales of government securities (so called open market operations) or with temporary loans to banks in its “lender of last resort” function. If a bank can issue its own currency (as they did in the old days) when a customer withdraws cash from its deposits, its asset backing (and reserve deposits at the Fed) will not be affected. Banks will now be able to do this by issuing their own stable coins. While the customer’s deposit balance will fall when withdrawing cash (or stable coins), its total of stable coins “cash” plus deposit balance will not change thus the bank assets backing them do not need to change. Thus, such fluctuations in the currency/deposit ratio would not product a fluctuation in the money supply.

From the customers side the stable coins are as good as traditional cash only to the extent that the infrastructure to accept them (e.g. phone wallets) has been designed and widely acquired/accepted. Just as it took many years for credit cards (Visa, Mastercard and American Express) to be widely adopted, the same will be true with stable coins. Just as you might now swap addresses via your respective mobile phones, you will be able to make payments.

If everyone can issue their own money it degenerates to barter, i.e. it would not be money at all. The essence of a successful means of payment is the certainty of its ultimate claim on the central bank’s official monetary liability (the dollar). When central banks were limited to issuing currency redeemable for “something” such as gold or silver, the amount they issued was limited by their holding of gold or silver, etc.  Today the Fed’s supply of money is limited by Congress’s mandate for price stability and full employment. And ultimately the government must accept such dollars in payment for our tax obligations stated in the same currency.