Are Stablecoins Actually Stable? USDT/USDC Depeg Risks Explained

CryptoRebateHub Editorial Team

Three causes of depegs, a review of historical depeg events, and how to diversify and monitor risk

Direct answer: Stablecoins are not absolutely safe. They hold their 1:1 peg through reserves, arbitrage mechanisms, and market confidence — break any link and a temporary or permanent depeg can follow. Fiat-backed coins like USDT and USDC are relatively robust, but even USDC briefly fell to 0.87 during the 2023 Silicon Valley Bank crisis.

Three causes of a depeg

  1. Reserve problems: Fiat-backed stablecoins (USDT/USDC) should hold equivalent cash and short-term Treasuries. When a reserve bank fails (USDC had $3.3B stuck at SVB in 2023), markets fear redemption risk and the price drops.
  2. Algorithmic failure: Algorithmic stablecoins (like the collapsed UST) hold their peg via mint-burn mechanics between tokens. A bank run triggers a death spiral — the 2022 UST/LUNA collapse to zero is the worst example.
  3. Liquidity drain: Even with full reserves, if liquidity on an exchange or pair suddenly dries up, the price deviates briefly. These usually heal fast.

Historical depeg events

  • May 2022 — UST to zero: A fundamental failure of algorithmic design, dragging LUNA from $80 to zero and triggering industry-wide deleveraging.
  • Mar 2023 — USDC to 0.87: SVB collapse impacted $3.3B of USDC reserves; deposits were fully available three days later and the peg recovered.
  • USDT's minor depegs: USDT has briefly dipped to ~0.95 on FUD several times but always recovered — no permanent depeg to date.

How regular users manage risk

  1. Diversify: Don't keep all stablecoins in one asset. Splitting USDT + USDC reduces the blow if one fails.
  2. Monitor reserve transparency: USDC (Circle) discloses reserves monthly, mostly cash and short Treasuries; USDT (Tether) has faced more historical scrutiny. Use the Exchange Reserve tool and official attestations.
  3. Watch for depeg signals: Treat stablecoins as tools, not savings. The Stablecoin Depeg Monitor tracks real-time peg deviation across major coins.
  4. Self-custody large amounts: Stablecoins on an exchange carry both "stablecoin risk" and "exchange risk." Withdraw large long-term holdings to self-custody.

The details people miss

Be wary of yield temptations — some platforms lure you to deposit stablecoins at high rates, essentially lending out your assets for spread. If the platform fails, your principal can vanish. The Stablecoin Yield tool compares rates, but remember: high yield always means high risk.

When trading these stablecoin pairs, fees can be recovered via rebates — the Rebate Calculator shows your annual savings.

Educational content only. Not financial advice.