On 11 March 2023 USD Coin, Circle’s dollar token, traded as low as the high-80-cent range on secondary markets. The day before, Silicon Valley Bank had been put into FDIC receivership after a classic run. Circle had disclosed that about $3.3 billion of USDC’s roughly $40 billion in reserves were deposits at SVB — on the order of eight percent. Primary mint and redeem desks do not work like a chain: they need banks open. Over the weekend they were not. People who wanted out sold the token to other people instead.
Circle said USDC remained redeemable 1:1 and that it would cover a shortfall with corporate resources if the bank did not pay in full. On 12 March US authorities said SVB depositors would be made whole when banks opened Monday. By 13 March the token was close to a dollar again. Silvergate’s wind-down earlier in the week and Signature Bank’s Sunday closure are part of the same US crypto-banking week. This page is pinned to the Saturday depeg, not to a tour of every failing charter.
What happened
Fiat-backed stablecoins are a claim on an issuer plus a claim on that issuer’s banks and Treasuries. The chain will transfer the token at 3 a.m. on a Saturday. The issuer cannot always move the dollars then. When the market smells a hole in the cash sleeve, the traded price leaves $1 even if the white paper still says $1. That is a depeg: a market price, not a rewrite of the smart contract.
Why it matters
If you treated USDC as cash in a wallet, you just learned the banking hours. If you used it as collateral, you learned about liquidations on a token that is “supposed to be” a dollar. Tether, ether, and bitcoin moved too — that is correlation, not a lesson that “crypto broke”. See stablecoins: useful, not magic. Circle’s later public listing is a 2025 company story; it does not unwrite this weekend.
What happens next
Redemptions when banks open, a smaller USDC float, and issuers talking more loudly about which banks they use. We will not tell you to rotate tickers. Nothing here is an instruction to buy, sell, or hold USDC or any other dollar token.
