Fixed exchange rate explained
By Ken Chigbo, Founder, KenMacro. Published 2026-05-13.
Quick answer
A fixed exchange rate is a regime where a central bank pegs its currency to an anchor, usually the US dollar, the euro, or a basket, at a chosen rate. The authority then buys or sells reserves to defend that rate, replacing market-driven price discovery with policy-driven price setting.
What is fixed exchange rate?
A fixed exchange rate is a monetary regime in which a central bank or monetary authority commits to maintaining its currency at a specific parity, or within a narrow band, against an anchor. The anchor can be a single currency such as the US dollar, a basket of trading-partner currencies, or, historically, gold. To hold the peg, the authority must intervene in the foreign exchange market using its reserves, adjust domestic interest rates, or impose capital controls. The Hong Kong dollar peg to the US dollar and the Saudi riyal peg are well-known examples. Fixed regimes sit at one end of the spectrum, with free floats at the other.
How traders use fixed exchange rate
Retail traders treat pegged pairs differently from floating pairs. Volatility on a credible peg, such as USD/HKD inside its 7.75 to 7.85 band, is structurally compressed, so directional strategies are largely pointless and carry trades dominate flow. Institutional desks instead watch the boundary of the band, reserve adequacy data, and forward points, since stress shows up first in the forwards curve and in option skew rather than spot. Traders also monitor balance of payments, reserve coverage ratios published by the IMF, and central bank communications for signs of strain. When a peg looks vulnerable, as with the Swiss franc in January 2015, positioning ahead of a potential break can be highly asymmetric, though the timing risk is severe and gap risk can exceed account equity on leveraged platforms.
Common misconceptions about fixed exchange rates
The first misconception is that a fixed rate means zero volatility. In practice most pegs operate inside a band, and the currency moves within it. The second is that a peg is permanent. History shows that pegs break when fundamentals diverge from the anchor, as in the 1992 ERM crisis or the 2015 EUR/CHF floor removal. The third is that a fixed regime removes FX risk for businesses. It removes day-to-day risk but concentrates tail risk into rare, violent revaluations. The fourth is that pegs require unlimited reserves; in reality they require credible policy, capital account management, and political will.
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Frequently asked
What is the difference between a fixed and a floating exchange rate?
A fixed exchange rate is set by a central bank against an anchor and defended through intervention, interest rate policy, or capital controls. A floating rate is determined by supply and demand in the open market, with little or no central bank targeting of the level. Most major pairs, including EUR/USD, GBP/USD, and USD/JPY, are floats. Pegs are more common among smaller economies, oil exporters, and economies seeking imported monetary credibility.
Why do countries choose a fixed exchange rate?
Countries adopt pegs to import monetary credibility, anchor inflation expectations, reduce trade and investment uncertainty with a major partner, and stabilise commodity revenues priced in dollars. Smaller open economies, financial centres such as Hong Kong, and oil exporters such as Saudi Arabia and the UAE typically favour pegs. The trade-off is the loss of independent monetary policy, since domestic interest rates must broadly track those of the anchor currency to sustain the parity.
What happens when a fixed exchange rate breaks?
When a peg breaks, the currency typically gaps sharply towards a market-clearing level, generating large losses for anyone short volatility or positioned with the peg. The Swiss National Bank’s removal of the EUR/CHF 1.20 floor in January 2015 moved the pair roughly 30 percent in minutes, wiping out retail accounts and several brokers. Capital controls may follow, liquidity dries up, and forward and option markets price a permanent regime change rather than a one-off shock.
Can retail traders trade pegged currencies?
Most retail brokers quote pegged pairs such as USD/HKD, USD/CNH, and USD/SAR, but spreads are wider, swap rates can be punitive, and intraday ranges are small. The desk view is that pegged pairs suit carry strategies and hedging flows rather than discretionary directional trading. Speculating on a peg break requires deep pockets, long holding periods, and tolerance for paying negative carry while waiting, which rarely aligns with retail account sizes or risk limits.
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