Pegs and Managed Currencies: When the Price Is Not Free

[Fairman]

Pegs and Managed Currencies: When the Price Is Not Free

Not every currency floats. Some are pegged to another currency or a basket, and their exchange rate is held within a narrow band by the central bank.

The Hong Kong dollar is a well-known case. It is allowed to trade between 7.75 and 7.85 per US dollar, and the Hong Kong Monetary Authority buys or sells to keep it within that range. Many Gulf currencies are also pegged to the dollar.

Other currencies are managed, with authorities steering the rate without fixing it, as with the Chinese yuan, which trades around a daily reference rate within a permitted band.

For traders, pegs mean little movement, until they break. When a peg comes under pressure, because the country cannot sustain the policy, sudden devaluations can happen. The Swiss franc's floor against the euro, abandoned in 2015, was a peg-like policy, and the removal caused one of the most violent moves in modern forex.

The risk profile of a pegged currency is lopsided: small gains from carry and tiny moves most days, and rare very large losses. That is the character of selling insurance.

Managed currencies can also behave unpredictably in response to policy decisions, and brokers may widen spreads sharply.

Understand the regime before trading any currency with controlled pricing.

Practical step: check which regime applies to each currency you trade, floating, managed, or pegged, and what the stated band is.

[Fairman]

The insurance comparison is spot on. Most days it looks like free money, and that's exactly what makes people oversize. If you trade anything pegged, size it for the day the peg breaks, not for a normal day.

[Fairman]

Small practical note: check your broker's margin rules for these pairs. Some brokers raise margin requirements on managed currencies around policy events with very little notice.