Depegging

Depegging is the process by which a currency or financial instrument that previously maintained a fixed exchange rate or peg to another currency or asset abandons that fixed rate and moves to a more flexible regime or a new peg. It can apply to fiat currencies with formal pegs, such as currency boards or policy arrangements that target a specific range, and to tokens or instruments designed to track a benchmark, such as stablecoins or asset-backed claims.

Depegging may be triggered by fundamental imbalances (persistent current-account deficits, inflation/difference in monetary policy), loss of credibility in the peg, or changed policy goals that favor monetary independence. It can be announced by the authority or occur abruptly when market pressure makes defending the peg untenable.

Consequences include higher exchange-rate volatility, changes in inflation and import costs, and potential effects on debt denominated in the anchor currency. The issuer's monetary autonomy may be restored, but credibility risks and transition costs can be significant. In some cases, authorities implement gradual adjustments or widen bands before a full float.

Notable examples include the 1992 exit of the United Kingdom from the European Exchange Rate Mechanism, the 2015 removal of the Swiss franc cap against the euro, and, in the crypto sector, the 2022 depeg of TerraUSD (UST) and related events that triggered wider market turmoil.

Depegging is distinct from devaluation or default; it is the governance decision to end a fixed rate regime. The term is most commonly used in discussions of monetary policy and financial stability, as well as in the context of stablecoins and crypto markets where pegged assets may lose their anchor.