The Federal Reserve's proposed rules for the payment stablecoin issuers it supervises include a crisis clock measured in hours. An issuer whose reserves fall below the value of its outstanding tokens would have 24 hours to notify the Fed and submit a plan to restore full backing.

Unless it closes the gap or the Fed directs it to proceed with that plan, the issuer must begin liquidating reserves and redeeming tokens by 5 p.m. on the next business day. The Fed says that window comes to less than 48 hours in many cases.

The 392-page proposal also lets the issuer keep minting new tokens during that rescue window, and the Fed ties that choice to the public nature of blockchains. An abrupt halt in issuance would be visible on-chain and could tip holders off to the problem, speeding up the very run the rules exist to contain.

Comments are open for 60 days once the proposal appears in the Federal Register.

The proposal requires reserve assets to equal or exceed outstanding tokens at all times. Issuers must formally record the fair value of those reserves at least once a day at 5 p.m. in the time zone of their supervising Federal Reserve Bank.

The Fed says issuers operating close to the line may need to run that calculation several times a day. The breach clock starts at the beginning of liquidation, and finishing the process can take longer. Once liquidation begins, minting stops and redemption fees are prohibited.

A separate rule for ordinary conditions requires honoring redemption requests within two business days, a timeline that runs independently of the breach clock.

The Fed illustrates the logic with a $100 million stablecoin backed by $95 million in reserves. Split evenly, every holder could recover $0.95 per token. Once $35 million redeems at full par value, $60 million in assets remains against $65 million in tokens, leaving about $0.92 of backing for everyone who holds on.