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Stablecoin Depegs Explained: What Really Happens When a Digital Dollar Breaks the Buck

Stablecoins are digital tokens meant to hold a constant $1 value, but some have failed. USDC traded below $1, USDT also traded below $1, and Terra's UST collapsed to nearly zero, erasing about $40 billion. In November 2025, xUSD lost over half its value in one day.

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What happened

Stablecoins are digital tokens meant to hold a constant $1 value, but some have failed. USDC traded below $1, USDT also traded below $1, and Terra's UST collapsed to nearly zero, erasing about $40 billion. In November 2025, xUSD lost over half its value in one day.

Confirmed

Global impact / market context

When a stablecoin loses its $1 peg, investors who hold it face sudden losses. This can cause panic selling, reduce trust in digital dollars, and force businesses that accept these tokens to rethink their cash management and risk.

Analyst inference

Stablecoin depegs can ripple through crypto markets, affecting trading and borrowing. If a major stablecoin breaks, it may lead to wider sell-offs and tighter access to cash for crypto firms, impacting their operations and investor confidence.

Analyst inference

What to watch

  1. Track whether USDC or USDT ever trade below $1, as seen historically when they dropped significantly, which signals stress in the stablecoin market. Confirmed
  2. Monitor the reserves behind major stablecoins, such as cash and short-term bonds, to see if they are enough to support the $1 peg during market turmoil. Proposed
  3. Watch for regulatory actions that may require stablecoin issuers to hold safer assets, which could increase costs but also reduce the risk of future depegs. Analyst inference

Affected assets

  • USDT — Tether
  • LUNA — Terra
  • USDC — USD Coin

Evidence