Stablecoin Depeg Explained (Why USDC Recovered and UST Never Did)

A stablecoin depeg is what happens when a token built to trade at $1 trades meaningfully away from it, usually below. It is the risk underneath roughly $304 billion of dollar stablecoins in circulation, per DefiLlama on 25 October 2026, and it has played out very differently from one coin to the next. USDC fell to about 87 cents in March 2023 and was back at a dollar within days. UST collapsed within a week and never recovered. A yield-bearing token called xUSD lost three quarters of its value within days in November 2025 and never came back.

The size of the drop alone did not tell holders which of those outcomes they were in. What helped was the cause, and in particular comparing the discount with the worst plausible hole behind the coin. This guide explains how a peg holds, the patterns behind most major depegs to date, what really happens to you as a holder when one hits, and the habits that protect you before and during the next one.

How a stablecoin peg actually holds

A peg is not a promise printed on the token. It is an arbitrage loop between two markets. In the primary market, approved customers create new coins (minting) by sending dollars to the issuer and redeem coins for dollars at $1 (at par), less any issuer fee. In the secondary market, everyone else trades the coin on exchanges and decentralised exchange pools at whatever price buyers and sellers agree.

When the two markets are connected, the price stays close to a dollar. If USDC trades at 99 cents on an exchange, a firm with redemption access buys it there and redeems it for a full dollar, which pushes the price back up. The loop works only as long as the redemption window is open and the market believes the dollars behind it are real.

That window is narrower than most holders assume. A Federal Reserve note on stablecoin markets found that USDC's primary market is reserved for direct Circle customers cleared through an application process, while Tether's is more restrictive still, with a reported minimum of $100,000 per mint. A retail holder is almost always a secondary market participant, which shapes everything about what a depeg means for you. You cannot cash in at $1 yourself, only sell at the market price or wait.

There is no official threshold. A tenth of a cent is noise. A gap of a cent or more that persists on every major venue, the outside sign that redemption is not closing it, is the signal worth taking seriously.

Depegs can also go up. In the March 2020 crash DAI, a stablecoin borrowed into existence against crypto collateral, traded as high as $1.22, per CoinDesk, as borrowers scrambled for DAI to repay loans. That rarely hurts savers, but it makes debt dearer at the worst moment.

Six patterns behind major depegs, and why the cause matters more than the size

Six patterns cover most of the major depegs to date. Each has two parts worth keeping apart, the cause (what triggered the depeg) and the backing (how the coin is built). The table shows both, and the sections after it draw the lessons.

Bank failure, the USDC depeg of March 2023

On 10 March 2023 Circle disclosed that $3.3 billion of USDC reserves sat at Silicon Valley Bank, which had just failed. The coin traded down to 87 cents on one exchange early on Saturday 11 March, per CoinDesk. The Fed note records that Circle's issuance and redemption were constrained by US banking hours, so over the weekend the arbitrage loop was effectively shut, and decentralised exchange volume passed $20 billion on 11 March against a typical $1 billion to $3 billion as holders swapped USDC for anything else.

Circle's own account puts the SVB deposit at about 8% of USDC's total reserve. Even if all of it had been lost, the rest covered roughly 92 cents per coin, yet the low near 87 cents priced in a bigger loss than was ever at the bank. That comparison, the discount against the worst plausible hole, is what knowing the cause lets you make and the size of the drop does not. The peg returned after US regulators announced on 12 March that all SVB depositors would be made whole. Holders who waited were proved right partly because Washington stepped in, a policy decision rather than part of USDC's design.

DAI, which had more than $3.1 billion of USDC in its collateral at the time, per Cointelegraph, was dragged off its own peg the same weekend, a reminder that two coins can look different and still share one weak point.

Algorithmic death spiral (UST, May 2022)

TerraUSD held no cash reserve. Anyone could swap 1 UST for a dollar's worth of newly printed LUNA, its sister token, which is what an algorithmic stablecoin means, a peg held by code rather than cash. When UST slipped, traders swapped it and sold the LUNA, which crushed LUNA's price and made defending the dollar ever harder. With no reserve, there was no hole to measure the discount against. UST lost its peg in May 2022, and roughly $40 billion in market value across UST and LUNA evaporated in a single week, per CoinDesk. UST trades at about half a cent today, per CoinGecko on 25 October 2026.

The contagion reached coins with real reserves too. On 12 May 2022 USDT sank to as low as 95 cents on some exchanges, per CNBC, and was back at $0.998 by the afternoon. What held it was redemption working at scale. Tether said it was on track to process more than $2 billion in redemptions that day, even though its reserves had been questioned after a settlement with the New York attorney general. One coin could still be cashed in for a dollar, the other only for freshly printed LUNA.

Confidence run (FDUSD, April 2025)

On 2 April 2025 Tron founder Justin Sun alleged that First Digital Trust, the trust company that holds FDUSD's reserves, was insolvent. The rumour had traction because the same company had managed reserves for TrueUSD (TUSD), and CoinDesk reported that day that filings showed some of those reserves stuck in illiquid investments. First Digital said every dollar backing FDUSD was accounted for, but during the run that was the issuer's word against Sun's, and the token fell to 0.87 against USDT and 0.76 against USDC on Binance, its main venue. Redemptions processed at par settled it within days, as our FDUSD breakdown covers.

Two lessons sit inside this one. TUSD shows the pattern a reserve-backed coin's holder has most reason to fear, reserves that exist on paper but cannot be turned back into dollars, so who holds the reserves matters as much as what they are. And stablecoins often trade against other stablecoins rather than dollars, so one exchange can show two prices at once. Check more than one market before you believe the worst number.

Crash on one exchange (USDe, October 2025)

During the crash of 10 and 11 October 2025, when falling prices forced mass closures of borrowed positions, Ethena's USDe dropped to 65 cents on Binance, per CoinDesk. Ethena said minting and redemption stayed operational throughout, and Aave, a large lending protocol that values USDe at a fixed $1 rather than reading an exchange price, kept doing so. Galaxy Research called it a case of the protocol's value and the exchange's price coming apart in a panic, a local market breaking rather than the dollar behind it.

The harm was real inside that venue. Binance valued collateral such as USDe and its wrapped staking tokens wBETH and BNSOL at its own order book prices, so traders who had borrowed against them were liquidated at distressed prices. It later announced compensation and changed how it prices wrapped assets, per CoinDesk. If you only hold a coin, a crash on one exchange is a paper loss. If you have borrowed against it there, it can be a real one. Our USDe explainer covers how this synthetic dollar differs from cash-backed coins.

Peg mechanism removed (sUSD, 2025 to 2026)

Crypto-backed stablecoins have no issuer to run on, but they depend on a mechanism and on the token holders who vote to change it. Synthetix's sUSD was minted by holders of SNX, Synthetix's own token, who locked SNX and took on sUSD as debt, and Synthetix says those stakers are "responsible for the health of the sUSD peg". Its 2025 redesign stopped that minting and relieved part of the old debt, so fewer holders needed to buy cheap sUSD to repay, and sUSD "depegged for months at a time", trading below 70 cents by February 2026.

In June 2026 Synthetix proposed retiring it under SIP-423, a governance proposal since implemented, which values sUSD at $1 but pays four SNX per sUSD, locked for a year and then vesting over a second. Four SNX were worth about 98 cents on 12 June, when the proposal was posted, but the market priced two years of locked SNX far lower, and sUSD traded around 23 cents by late June, per DefiLlama price data.

Curve's crvUSD, a crypto-backed coin with automatic peg-keeping contracts, traded only a fraction of a cent below $1 for a few days in August 2023, per DefiLlama data, and our crvUSD guide explains its design. A depeg here tells you to read the mechanism and watch the votes that can change it, because the rescue may pay you in the protocol's own locked token rather than in dollars.

Strategy loss (xUSD, November 2025)

Stream Finance's xUSD was a yield-bearing token whose deposits went to strategies run partly by an external fund manager. In early November 2025 Stream disclosed that the fund manager had lost about $93 million and suspended all deposits and withdrawals, and by 4 November xUSD had fallen about 77% to 26 cents, per Decrypt. It was trading at around two cents when CoinGecko last updated its price, in September 2026. Researchers traced more than $284 million in loans and stablecoin exposure linked to Stream across lending markets, per Cointelegraph, because other protocols had used xUSD as collateral and backing.

This is the easiest depeg type to misread. A dollar token that pays a yield is an investment product with a dollar ticker, and when the strategy loses money there is no reserve to redeem against, only the strategy's remaining assets.

What actually happens to you during a depeg

Start with the uncomfortable part. Without a direct redemption account you can hold, or sell into the secondary market at whatever price it offers. During the USDC weekend the gap went to well-capitalised traders who could buy at a discount and wait for redemption to reopen on Monday. CoinDesk traced one wallet that used $215 million of USDT to buy USDC below 90 cents and earned around $16.5 million when the peg returned.

That makes selling at the bottom a decision with a fixed price tag. Sell 10,000 USDC at 90 cents and you have $9,000, a $1,000 loss that is now permanent. Hold, and on that occasion the market price was back near a dollar by Monday. The catch is that holding only works when the dollars are really there. UST holders who waited got nothing, and xUSD holders who waited found the exit closed. Neither holding nor selling is right by default. Diagnosing the cause is the decision.

If your stablecoins sit as collateral, the risk changes shape. A venue that values your collateral at its own local price can liquidate your position on a dislocation that reverses within hours, and the liquidation stays done even when the peg returns. And coins on a platform rather than in your own wallet are a claim on that platform, denominated in the coin, so if the platform gets into trouble you wait in line with its other creditors. That March weekend, per the Fed note, even exchanges that normally converted USDC one for one paused.

What this means for USDT and USDC holders

So far every depeg of USDT or USDC has been brief and has reversed, the worst being USDC's weekend near 87 cents. Four of the six cases above involve coins built very differently, so algorithm and strategy failures are not your realistic risk. The tail risk is the reserve itself, a bank failure bigger than any backstop, a custodian that cannot return reserves the way TUSD's could not, or an issuer freeze. For these two coins the reserve report and who holds the reserves matter most, and our safest stablecoins framework compares them on exactly that.

How to protect yourself from a stablecoin depeg

Protection mostly happens before the event, in what you choose to hold and where. Eight habits cover most of it.

Know what backs your coin. In the table above the two cash-backed coins recovered, USDe never truly broke, and the other three failed in ways specific to how they were built. If you cannot name what backs a coin, you cannot judge a depeg in it.

Read the reserve report, and know what kind it is. A monthly attestation checks that reserves existed on a given date. A full audit tests the issuer's books, controls and liabilities. Neither fully answers whether a custodian can hand the reserves back, the TUSD problem. Our proof of reserves explainer covers what each report proves and leaves out.

Check who can redeem, and when. Prefer coins whose issuer redeems quickly and for a wide set of firms, since redemption rights, minimum sizes and banking hours decide how fast a gap closes. Issuers under a supervised trust charter, such as those of PYUSD and RLUSD, publish those terms in detail, though both coins are far smaller than USDT and USDC.

Respect liquidity depth. USDT and USDC carry market caps of about $182 billion and $72 billion, per CoinGecko data for USDT and USDC on 25 October 2026. Market cap is a rough proxy for market depth, and a coin a hundredth that size can be pushed much further from a dollar by the same selling, whatever its reserves say.

Diversify across issuers and backing. Splitting holdings between two or three issuers limits the damage of any single failure, provided they do not share a weak point, such as one coin holding the other as collateral, the way DAI held USDC in 2023, or both keeping reserves at the same bank or custodian.

Never treat a yield-bearing token as cash. If a dollar token pays a rate, ask where the rate comes from and who absorbs a loss. A yield-bearing token belongs in the investment part of your portfolio, sized accordingly.

Choose the venue as carefully as the coin. Any platform that pays yield deploys deposits somewhere, adding its own strategy and venue risk on top of the coin's. What separates platforms is whether they say how, the question our rehypothecation guide works through, and Celsius, the lender that froze withdrawals in 2022, shows what happens when they do not.

When a depeg starts, diagnose before you act. You cannot test redemption yourself, but you can watch its effects. Look for a specific, checkable issuer statement that redemptions are processing. Check whether supply is shrinking on the issuer's transparency page or a block explorer, since redeemed coins are destroyed. And use the coin's market list on CoinGecko to see whether the price is recovering on the largest venues or broken on only one. If redemption has stopped, ask whether the reserve is impaired or a bank or a weekend is in the way. A real reserve with a temporary access problem argues for patience, a broken mechanism or frozen strategy for getting out while an exit still exists.

What this means if you earn yield on stablecoins

Earning on a stablecoin does not remove its depeg risk, and it adds the risks of the strategy and the platform on top. EarnPark pays yield in kind, so a USDT balance is held and paid in USDT. If USDT lost its peg, your USDT count would not change, but each would be worth less in dollars, as in your own wallet. EarnPark does not offer depeg protection.

Inside a strategy a depeg can reach a balance in more ways than that. Some strategies, Maker Core among them, post deposits as collateral on trading venues and use leverage, so a sharp move in the deposited coin, a depeg included, can cost more than the move itself, and in a stressed market several risks tend to arrive together. Like any yield strategy, these carry no deposit insurance. The platform-level risks sit in a standalone risk statement worth reading before you deposit.

As of October 2026 EarnPark publishes up to 15% APY on USDT and up to 10% on USDC, the base every account gets while holding none of EarnPark's own PARK token. The table is a snapshot of the app, not past performance, and current figures sit in the app.

The Market-Exposed label matters most here. Alpha Vault keeps roughly half its position in crypto, so a USDT balance there can shrink in USDT terms when crypto prices move against it, even while USDT holds its peg.

Be clear about what withdrawal terms buy you in a depeg. Any withdrawal returns the coin you deposited at whatever the market pays for it that day, so an on demand exit does not protect your dollar value. It only decides how soon you can choose between holding and selling. The terms describe normal market conditions, and processing can take longer when many requests arrive at once.

Holding some USDT and some USDC spreads issuer risk, though not platform risk, since both balances sit with the same company and the venues its strategies use. A balance there is a claim on the company under its strategy terms, so the monthly reserve report is worth reading, bearing in mind that EarnPark publishes it itself rather than as an independent audit. Our USDC rates comparison weighs these terms against other venues, coin risk first, venue and product risk on top.

The question to ask when the price slips

The next depeg will look like one of the six above, or a new mix of them. The holders who come through it well rarely guessed the bottom. They knew beforehand what backed their coin, who could redeem it and where they held it, so the only question left when the price slipped was whether the dollar behind it was still there.

If you have done that homework and want your stablecoins to earn while you hold them, compare each strategy's risk label and withdrawal terms in the app, read the risk statement alongside them, and start earning once the fit is right.

FAQ

What does depeg mean in crypto?

Depeg in crypto means a token designed to track a fixed value, usually $1, is trading meaningfully away from it. The term mostly applies to stablecoins, though wrapped and staked tokens can also depeg from the asset they track. A brief move of a fraction of a cent is normal, while a sustained gap that the issuer's own swap back to $1 is not closing is a real depeg.

Has USDC ever depegged?

USDC has depegged once in a major way, in March 2023, when $3.3 billion of its reserves sat at the failed Silicon Valley Bank. It fell to about 87 cents at its low over the weekend of 11 March and returned to $1 within days, after US regulators said SVB depositors would be made whole and Circle confirmed its reserves were available.

Is it possible for USDC to crash?

USDC can fall below a dollar, and briefly did in March 2023, when about 8% of its reserves sat at a failed bank. A lasting crash would need a large share of its reserves to be lost or locked away for good, which did not happen in 2023, when regulators made the bank's depositors whole and the price came back within days. The risk is not zero, since USDC is not an insured deposit and its value rests on Circle's reserves and on redemption staying open.

Has USDT ever lost its peg?

USDT has lost its peg briefly. On 12 May 2022, during the UST collapse, it fell to as low as 95 cents on some exchanges and was back near $1 the same afternoon, as Tether said it was processing more than $2 billion of redemptions that day.

Can a depegged stablecoin recover?

A depegged stablecoin can recover when the assets behind it are real and redemption keeps working, as USDC, USDT and FDUSD showed. Coins whose mechanism broke, such as UST, or whose backing was lost, such as xUSD, have not recovered. Comparing the discount with the worst plausible loss in the backing is the best guide to the outcome.

Do stablecoins ever lose value?

Stablecoins do lose value, usually briefly for reserve-backed coins and permanently for several others. Algorithmic designs and yield-bearing tokens whose strategies failed have gone close to zero, while reserve-backed majors have so far recovered every time. Stablecoins are not insured deposits, so a permanent loss falls on the holder.

How do I protect myself from a stablecoin depeg?

Protecting yourself from a stablecoin depeg starts with knowing what backs each coin you hold and who can redeem it. Prefer deep liquidity and clear reserve reporting, spread holdings across issuers that do not share a weak point, never treat a yield-bearing token as cash, and choose a venue you can exit. If a depeg starts, look for an issuer statement that redemptions are processing, falling supply and a price recovering on the largest venues before you sell.