What Is a Pegged Exchange Rate and How Do Fixed FX Pegs Work?

This guide explains what a pegged rate is, the main types of peg regimes, and how central banks defend them. A guide to how currency pairs are structured and quoted covers how currency pairs are structured.

What Does Pegged Mean: Definition

A pegged exchange rate is a regime in which a country's central bank sets and maintains its currency's value at a fixed or near-fixed rate relative to another currency, a basket of currencies, or a commodity like gold. The central bank actively intervenes in the foreign exchange market to keep the rate within its target. Pegged regimes come in several forms:

• Fixed peg (hard peg): the rate is locked at a specific level with no intentional fluctuation, such as a currency board

• Peg with a band (soft peg): the rate is allowed to fluctuate within a defined range around the central value

• Crawling peg: the central rate is adjusted gradually over time, often to reflect inflation differentials

Pegged vs Fixed Exchange Rate

The terms are often used interchangeably, but they are not quite synonymous. A fixed peg (hard peg) is a specific type of pegged regime in which the rate is locked rigidly, such as a currency board. Pegged regimes also include softer arrangements like bands and crawling pegs that allow controlled movement. In practice, most modern regimes described as "fixed" are actually pegged regimes with some flexibility built in.

How Central Banks Maintain a Currency Peg

The central bank sets a target rate and monitors the market. If the currency weakens below the peg, the bank sells foreign reserves and buys the domestic currency to push the rate back up. If it strengthens too much, it does the reverse. This requires holding sufficient reserves: a bank that runs out cannot defend the peg against sustained pressure. A guide to how central bank actions influence forex markets covers how central bank interventions ripple through forex markets.

Examples of Pegged Currencies

The Hong Kong dollar is pegged to the US dollar under a currency board system, fully backed by US dollar reserves. The Saudi riyal is pegged to the US dollar, supported by SAMA's (the Saudi central bank's) substantial foreign currency reserves. The UAE dirham is also pegged to the dollar. The Chinese yuan operates under what the People's Bank of China describes as a managed floating regime with reference to a basket of currencies, not a conventional peg but more tightly managed than a free float.

Pegged vs Floating Exchange Rate

A floating exchange rate is determined by market supply and demand without a central bank target. Pegged rates offer stability and predictability, benefiting smaller or trade-dependent economies, but require reserves and limit independent monetary policy. Floating rates allow policy freedom but can be more volatile.

What Happens When a Peg Breaks

Pegs tend to break when macroeconomic imbalances become incompatible with the fixed rate. The consequences can be severe and rapid. The direction of the move depends on the nature of the peg:

• When a peg that was holding a currency artificially strong is abandoned, the currency typically depreciates sharply. In 1997, Thailand's abandonment of its dollar peg triggered a rapid devaluation and helped set off the Asian Financial Crisis

• When a peg or floor that was holding a currency artificially weak is removed, the currency can appreciate violently. In January 2015, the Swiss National Bank ended the franc's minimum exchange rate floor against the euro, and the franc surged more than 11% within minutes

In both cases, the fallout can include banking stress, capital flight, and severe disruption to businesses exposed to the affected currency. A guide to trading around high-impact macro events covers how traders approach these high-impact macro events.

Conclusion

A pegged exchange rate is a regime in which a central bank maintains its currency at a target value through active intervention. Fixed pegs, soft pegs, and crawling pegs are all variants. When a peg breaks, the currency can move sharply in either direction depending on whether the peg was holding it artificially strong or weak, as the Swiss franc in 2015 and the Thai baht in 1997 illustrate. A peg is only as strong as the reserves and credibility defending it.

Risk Disclaimer: Trading involves significant risk of capital loss. This article is for educational purposes only and does not constitute financial advice. Always conduct independent research and consider your risk tolerance before making any trading decisions.