The Carry Trade Explained: How It Works and Its Risks
Educational content. This article explains the mechanics and risks of the forex carry trade. It does not constitute investment advice, a recommendation, or an offer to buy or sell any financial instrument. CFD trading carries significant risk of loss and may not be suitable for all investors. Past patterns do not guarantee future results, and the carry trade carries asymmetric risk of loss.
Among forex strategies, the carry trade is one of the oldest and most discussed, because it offers something unusual: a position that can earn income simply for being held. Instead of relying on the exchange rate moving in your favour, the carry trade aims to harvest the interest-rate gap between two currencies, paid out as a small daily credit. That income is real and visible in the trading account, but it comes attached to a risk profile that has caught out generations of traders.
This guide explains what the carry trade is, how the interest-rate differential becomes a positive swap, which pairs are traditionally used, and how the two sources of profit and loss, the carry and the currency move, interact. It then sets out the asymmetric risk that defines the strategy, including the carry unwind. It builds on the how to trade forex pillar.
What Is the Carry Trade in Forex?
The carry trade is the strategy of holding a higher-yielding currency against a lower-yielding one in order to earn the difference between their interest rates, received as a positive overnight swap for as long as the position is held.
The idea borrows from a simple principle: if one currency pays a higher interest rate than another, holding the higher-yielder against the lower-yielder should, all else equal, earn that gap over time. In forex, you do not literally take out a loan in one currency and deposit in another; instead, the interest-rate differential is settled daily as the swap, the overnight financing credit or charge applied to a position held past the daily rollover. When you hold the higher-yielding currency long, that swap can be a credit rather than a cost. Why those rates differ in the first place is a question of central bank policy, covered in how central banks affect forex.
How Does a Carry Trade Work?
A carry trade works by holding the higher-yielding currency in a pair and funding it with the lower-yielding one, so that each day the position is open it earns the interest-rate differential as a positive swap.
The mechanics, step by step:
- Identify the rate gap. Find a pair where one currency's central bank holds rates well above the other's.
- Hold the higher-yielder long. Take a long position in the pair where the higher-yielding currency is the base, funded by the lower-yielding (quote) currency.
- Collect the daily swap. For each night the position is held past rollover, a positive swap can be credited; on VantoTrade this is applied with a triple charge on Wednesday to account for weekend settlement.
- Manage the currency risk. The exchange rate continues to move, and that movement is a separate and usually larger source of profit and loss than the swap.
The "funding currency" is the low-yielding one you are effectively short; the "target currency" is the higher-yielding one you are long. The strategy's appeal is the steady credit, but its outcome is dominated by step four.
What Is Positive Swap (Positive Carry)?
A positive swap, or positive carry, is the credit a position earns when the currency it is long pays a higher interest rate than the currency it is short, making the overnight financing a gain rather than a cost.
For most positions, holding overnight costs money: the swap is a debit. The carry trade deliberately seeks the opposite, a position where the rate differential works in your favour and the swap is credited to the account each night. This positive carry is the entire income engine of the strategy. It is typically small per day relative to the position size, which is why carry is a slow accumulation rather than a quick gain, and why it is so vulnerable to being wiped out by an adverse move in the exchange rate.
Which Currency Pairs Are Used for Carry Trades?
The classic carry pairs combine a higher-yielding currency with a low-yielding funding currency, and the textbook examples are AUD/JPY and NZD/JPY, with the Japanese yen as the traditional funding currency.
Japan held ultra-low or negative interest rates for decades, which made the yen the funding currency of choice for carry trades worldwide. Paired against higher-yielding currencies such as the Australian and New Zealand dollars, the result is the two most-cited carry pairs:
| Pair | Long-side carry | Published long swap (per lot) | Triple-swap day |
|---|---|---|---|
| AUD/JPY | Positive on the long side | +4.00 | Wednesday |
| NZD/JPY | Positive on the long side | +3.64 | Wednesday |
These figures come from VantoTrade's published swap data and illustrate the signature of a positive carry: holding AUD/JPY or NZD/JPY long earns a credit each night, reflecting the higher-yielding Australian and New Zealand dollars held against the lower-yielding yen. The dollar-yen pair, USD/JPY, is also a positive-carry pair on the long side; for its pair-specific mechanics, including its own swap figures and risk profile, see the dedicated USD/JPY guide. Swap values change with policy and market conditions, so the current figure for any pair should always be checked in the trading calculator.
A Worked Carry Trade Example
A simple carry example shows how the swap accrues: a long position in AUD/JPY earns the published positive swap for each night it is held, while the exchange rate moves separately, usually with a far larger effect on the position's value.
Consider a one-lot long position in AUD/JPY, where one standard lot is 100,000 of the base currency. At the published snapshot, holding that position long credits a positive swap of +4.00 per lot each night, with three nights' worth applied on Wednesday. Held across a normal five-day week, the swap accumulates as a series of small daily credits.
That is the carry. The exchange rate, however, is moving the whole time, and for a yen pair one pip is 0.01, so even a modest move of, say, 100 pips against the position represents a change in value many times larger than a single night's swap. This is the essential point: the daily credit is small and steady, while the currency move is large and uncertain. The carry can be entirely overwhelmed by an adverse exchange-rate move, which is why the strategy is defined as much by its risk as by its income. This is an illustration of the mechanics, not a suggestion to take the position.
Carry Profit vs Currency-Price Movement: the Two P&L Drivers
A carry trade has two separate sources of profit and loss: the swap income from the rate differential, and the change in the exchange rate itself, and the second is almost always the larger and more volatile of the two.
It helps to think of the position as two overlaid bets. The first is the carry: a small, predictable credit that accrues night after night. The second is the directional exposure: the value of the position rises and falls with the pair, exactly as any other position does. In calm, trending conditions the two can work together, with a stable or rising target currency adding to the steady swap. But the directional component is far larger in magnitude, so it dominates the outcome. A carry trade that "works" is usually one where the exchange rate cooperated; the swap is the bonus, not the foundation.
What Are the Risks of a Carry Trade?
The carry trade's main risk is that an adverse move in the exchange rate can erase the accumulated swap, and much more, very quickly, a risk amplified by the leverage typically used to hold these positions.
The risks compound one another:
- Exchange-rate risk. The directional move is the dominant driver, and it can turn against the position far faster than the swap accumulates.
- Leverage risk. Carry trades are typically held on margin, and leverage amplifies both the swap income and, more importantly, the currency losses; a position can lose more than the initial deposit.
- Reversal risk. Carry pairs can move sharply and suddenly when sentiment shifts, as described in the unwind section below.
- Policy risk. The rate differential that powers the carry can narrow if central banks change course, reducing or removing the positive swap.
The widely used description is that the carry trade "goes up the stairs and down the elevator": modest gains accumulate slowly, then a sharp reversal can give back far more in a single session. A position should be sized for that downside move, not for the daily credit.
What Is a Carry Trade Unwind?
A carry trade unwind is a rapid, self-reinforcing reversal in which traders close carry positions all at once, buying back the funding currency and driving it sharply higher.
Carry trades tend to accumulate during calm, low-volatility periods when the steady swap looks attractive and the funding currency is weak. When sentiment turns, a risk-off shock, a sudden policy surprise, a spike in volatility, those positions are unwound together. Because so many participants are positioned the same way, the exit is crowded: the funding currency is bought back rapidly, the move feeds on itself, and the reversal is far faster than the slow build-up that preceded it. The August 2024 episode, when a rapid yen rally forced widespread liquidation of yen-funded carry positions, is a frequently cited illustration of how violently a carry can unwind. It is a historical example of the strategy's asymmetric risk, not a prediction that any particular pattern will repeat.
Why Low-Volatility Regimes Favour Carry, and What Ends Them
The carry trade tends to perform best in calm, low-volatility conditions and worst when volatility spikes, because the strategy depends on the exchange rate staying stable enough for the steady swap to matter.
When markets are quiet and currencies are range-bound, the small daily carry can accumulate without being overwhelmed by exchange-rate swings, and the strategy looks appealing. That very appeal draws in more positioning, which can build a large, one-sided crowd over time. What ends these regimes is almost always a jump in volatility: a shift in risk sentiment, an unexpected central bank move, or a macro shock that makes the small carry irrelevant next to the size of the currency move. The strategy's calm-weather strength is also the source of its vulnerability, because the positioning that builds up in quiet times is what fuels the violent unwind when conditions change.
How Is Carry Calculated on a CFD Position?
On a CFD position, the carry is realised through the swap, the overnight financing amount credited or debited to the account each time the position is held past the daily rollover, based on the interest-rate differential between the two currencies.
You do not receive a separate interest payment; the carry shows up as the swap line on the position. If the differential favours the side you hold, the swap is a credit; if not, it is a charge. The amount depends on the pair, the position size, and the prevailing rates, and is tripled on Wednesday to cover weekend settlement. Because swap rates are set per instrument and change with conditions, the only reliable figure is the current one shown in the trading calculator for the specific pair and size.
Does the Carry Trade Still Work After Rate Cuts?
Whether the carry trade remains attractive depends entirely on the prevailing interest-rate differentials, which shift as central banks change policy; when a high-yielding currency's central bank cuts rates, the differential, and the positive swap, narrows.
The carry trade is not a fixed feature of any pair; it exists only as long as a meaningful rate gap exists. If the central bank of the higher-yielding currency cuts rates, or the funding currency's central bank raises them, the differential narrows and the positive swap shrinks, sometimes to nothing. This is why carry conditions evolve over the cycle and why the pairs that work as carry trades change over time. Tracking the policy direction of the relevant central banks is therefore central to understanding whether a carry exists at all. This is a description of how the conditions change, not a forecast of any central bank's next move.
Frequently Asked Questions About the Carry Trade
What is a carry trade in simple terms?
A carry trade is holding a higher-yielding currency against a lower-yielding one to earn the difference in their interest rates, paid out as a positive overnight swap for as long as the position is held. The income is steady but small, and it sits alongside the much larger and uncertain effect of the exchange rate itself moving. It is a mechanism for harvesting an interest-rate gap, not a guaranteed profit.
What are the best currency pairs for a carry trade?
The pairs traditionally used for carry trades combine a higher-yielding currency with a low-yielding funding currency. AUD/JPY and NZD/JPY are the textbook examples, pairing the higher-yielding Australian and New Zealand dollars against the Japanese yen, long the classic funding currency. On VantoTrade's data both show a positive long swap. The suitability of any pair depends on the current rate differential, which changes with central bank policy.
What is the difference between positive and negative swap?
A positive swap is a credit earned when the currency you hold long pays a higher interest rate than the one you hold short; a negative swap is a charge incurred when it pays a lower rate. The carry trade deliberately seeks positive swap by holding the higher-yielder. The swap is applied each night a position is held past rollover and tripled on Wednesday for weekend settlement.
What is a carry trade unwind, and why did it happen in August 2024?
A carry trade unwind is a rapid, self-reinforcing reversal in which crowded carry positions are closed at once, driving the funding currency sharply higher. In August 2024, a fast yen rally forced widespread liquidation of yen-funded carry positions, a frequently cited illustration of how quickly the strategy can reverse. It demonstrates the carry trade's asymmetric risk, where a sudden move can erase accumulated swap and more; it is a historical example, not a prediction.
Does leverage make the carry trade riskier?
Yes. Carry trades are typically held on margin, and leverage amplifies both the swap income and the currency-price movement, but because the currency move is the far larger driver, the main effect of leverage is to magnify potential losses. A leveraged position can lose more than the initial deposit. For this reason a carry position should be sized for a sharp adverse move, not for the modest daily credit it collects.
Put the Carry Trade Into Context
The carry trade is one application of the interest-rate forces described in how central banks affect forex and the how to trade forex pillar. For the pair-specific mechanics of the most-discussed dollar carry pair, read the USD/JPY guide; to understand the overnight financing that pays the carry, see what is swap in trading. Check the live swap on any pair in the trading calculator, or open a demo account to see how swap accrues on a held position without financial exposure.
Risk warning. Trading securities, futures, options, and contracts for differences are complex financial instruments that require knowledge and understanding. Prices can fluctuate significantly and securities may become valueless. Investors may incur losses exceeding the potential for profits. Trading on margin can result in losses greater than the amount initially deposited. Past performance is not necessarily a guide to future performance. The information in this article is for educational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any financial instrument. Consider whether CFD trading is appropriate for your circumstances and seek independent advice if necessary.
