Carry Trades: Why Interest-Rate Gaps Matter

Work out what the carry return contains

Can the interest earned on the higher-yielding currency absorb an unfavorable exchange-rate move? An unhedged carry position combines the interest differential with the change in the currency pair, less financing, transaction, and other holding costs. The quoted rate gap is only one part of the outcome.

A fully hedged position is different: forward pricing reflects interest-rate differentials and market conditions, so the visible yield difference is not automatically a risk-free profit. State whether the example is hedged or unhedged before comparing returns.

Identify the funding leg and the unwind risk

A carry trade borrows or funds in one currency and holds exposure to another. If the funding currency strengthens, volatility jumps, or financing becomes less available, losses can arrive faster than interest accrues. Leverage and margin rules can force exits before a longer-term view has time to work.

Crowded positions can amplify a move: similar investors may reduce exposure together when risk limits are reached. That possibility is a vulnerability, not a timetable; neither a rate gap nor a low-volatility period tells an investor when a reversal will occur.

Measure the position on its full holding horizon

A useful comparison includes both currencies’ expected policy paths, spot volatility, financing terms, hedging costs, and the amount that could be lost during an adverse move. Stress a rapid currency reversal as well as a gradual change in rates, and consider whether the position can be held through either.

The BIS discussion of carry trades and the IMF exchange-rate primer explain the basic mechanisms; neither makes a particular pair’s future return predictable. A positive yield gap is compensation for exposure, not a promise of profit. This article is educational information, not individualized investment, tax, or legal advice. Verify current prices, regulations, fees, and product documents before acting, and consider speaking with a qualified professional when the decision is material.