Are Stablecoins Safe? How Depegs Happen and What Backs Them

Stablecoin safety depends on three concrete elements: the assets that back tokens, the mechanics and speed of redemption at $1, and issuer transparency about reserves. Failures can begin when reserves lose value, redemptions stall, or market confidence weakens. In May 2022 TerraUSD fell from $1 to under $0.10, erasing roughly $40 billion. In March 2023 USDC traded near $0.87 after $3.3 billion of its cash was tied to a failed bank and redemptions could not proceed over a weekend.

Stablecoins fall into three main categories with different risk profiles. Fiat-backed tokens such as USDC and USDT hold cash, short-dated U.S. Treasury bills and overnight repurchase agreements and face risks tied to reserve quality, custody and redemption procedures. Crypto-backed tokens like DAI are overcollateralized, typically by 150% or more, which offsets ordinary price swings but can fail in a rapid crash. Algorithmic stablecoins use code and market incentives rather than explicit reserves; that design produced large losses in 2022 and has not regained broad market trust.

By 2026 leading fiat-backed issuers report reserves concentrated in short-dated U.S. Treasuries and overnight repo, with smaller allocations to cash and money market funds. Circle publishes monthly reserve attestations with CUSIP-level detail for Treasury holdings. Tether’s reports disclose broader categories and have included non-traditional assets alongside a large T-bill position. An attestation confirms holdings at a point in time; an audit examines controls and balances over a period. No major issuer currently publishes a full audit that covers both holdings and internal controls.

Federal legislation enacted in July 2025, the GENIUS Act, requires permitted U.S. stablecoin issuers to hold 1:1 reserves in high-quality liquid assets, provide monthly reserve disclosures, place reserves in bankruptcy-remote custody and meet timely redemption obligations. Final agency rules implementing the law remain in preparation, with the framework expected to be fully effective by January 2027. The law does not create deposit insurance for token holders; if an issuer fails, holders have a priority claim on segregated reserves and must pursue recovery through a legal claims process.

Remaining exposures include operational failures at custodians or banks that hold reserves, redemption friction because direct $1 redemptions are typically available to institutions while retail exits occur on exchanges at market prices, the ability of issuers to freeze or blacklist addresses for compliance, and tokens issued outside the U.S. regulatory framework. Historical data show most consumer losses labeled as stablecoin incidents stem from exchange bankruptcies, decentralized finance exploits or collapse of yield providers rather than the token reserves themselves.

Industry guidance and common practices reported by market participants include choosing tokens with verifiable, recent reserve disclosures; using issuers that operate under the new regulatory framework for funds that cannot be lost; diversifying holdings across issuers; holding long-term value in self-custody or with regulated custodians rather than on trading platforms; and treating yield products as separate counterparty decisions because earning a return introduces additional risks beyond the token.