Carry in forex and futures: definition
By Ken Chigbo, Founder, KenMacro. Published 2026-05-13.
Quick answer
Carry is the net interest a trader earns or pays for holding a position overnight. In forex it equals the rate differential between the two currencies in the pair. In futures it reflects the cost of financing the underlying plus storage minus any yield. Positive carry pays the holder, negative carry costs them.
What is carry?
Carry refers to the running cost or income generated by holding a position, separate from price movement. In foreign exchange, carry is the interest rate differential between the long currency and the short currency, credited or debited as a daily swap. In futures, carry is embedded in the basis between spot and forward prices, reflecting financing costs, dividends, coupons, or storage. A trader long a high-yielding currency against a low-yielding one collects positive carry. A trader short a high yielder pays negative carry. Carry compounds daily and can dominate returns in low-volatility regimes, particularly across slow grinding ranges.
How traders use carry
Retail traders see carry as the daily swap line on their platform, debited or credited at the broker rollover, typically near 5pm New York time, with triple swap applied on Wednesdays to cover the weekend. Institutional desks treat carry as a core return factor alongside value, momentum, and quality. Macro funds size FX carry baskets using policy rate differentials, often funded out of JPY or CHF and held in higher-yielding pairs such as MXN, BRL, or AUD. The desk monitors carry exposure carefully because carry trades exhibit negative skew: small steady gains over months can be erased in days when volatility spikes and crowded positioning unwinds. Futures traders price carry into calendar spreads, watching contango and backwardation as direct expressions of the cost of holding.
Worked example of carry in an FX position
Consider a trader long AUD/JPY when the Reserve Bank of Australia policy rate sits well above the Bank of Japan rate. Holding one standard lot earns a positive swap credited daily, reflecting the gap between the two policy rates minus the broker spread on the swap. Over a quarter, this accrual can add meaningfully to total return even if spot price barely moves. Reverse the position, short AUD/JPY, and the trader pays that same differential each day. Carry compounds quietly until a risk-off event reprices the cross sharply lower, often wiping out months of accrual in a single session.
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Frequently asked
What is the difference between carry and swap?
Swap is the mechanical daily credit or debit a broker applies to roll a spot forex position to the next value date. Carry is the underlying economic concept, the interest rate differential between the two currencies. Swap is how carry is delivered to the retail trader, but brokers add a spread to the raw differential, so the swap a trader receives is usually less generous than the pure interbank carry an institutional desk would capture.
Why do carry trades blow up?
Carry trades concentrate risk in crowded positioning. When volatility is low, capital flows steadily into high yielders funded from low yielders, pushing them further. When a shock hits, often a sudden risk-off event or a central bank surprise, leveraged holders rush for the exit simultaneously. The funding currency, frequently JPY or CHF, rallies violently. The accumulated carry of many months can disappear within days, producing the characteristic negative skew of the strategy.
Is positive carry guaranteed profit?
No. Positive carry is a running income, but it sits alongside mark to market on the spot position. A trader can collect swap every night and still lose money overall if the high-yielding currency depreciates faster than the carry accrues. Historically, carry strategies generate positive long-run returns but with episodic deep drawdowns. The desk treats carry as one return source among several, not a standalone yield product.
How does carry work in commodity futures?
In commodity futures, carry reflects the full cost of holding the physical: financing, storage, insurance, less any convenience yield. When forward prices sit above spot, the market is in contango, and a long futures position rolling forward pays negative carry. When forwards sit below spot, the market is in backwardation, and the long roll earns positive carry. Commodity index investors and trend followers watch the roll yield closely because it can dominate total return over time.
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