Short answer: a carry trade is a position that borrows a low interest rate currency and holds a higher interest rate currency. The trader collects the gap between the two rates for every day the position stays open. In spot forex and CFDs, that gap arrives as the nightly swap credit. The catch is that the exchange rate moves far more than the carry earns, so one disorderly week can erase months of income. This page covers where the carry comes from, how it reaches your account, and the unwind risk that makes it precarious.
Where the carry comes from: the interest rate differential
Every currency has a policy rate set by its central bank. When you hold one currency against another, you are effectively lending the one you bought and borrowing the one you sold. The difference between the two rates, the interest rate differential, is the carry. It is positive when you own the higher-rate side and negative when you own the lower-rate side.
| Role in the pair | Illustrative policy rate | Result if you buy it against the other side |
|---|---|---|
| Target currency, high rate | 5.0% | Earn roughly the gap, minus broker markup |
| Middle currency | 2.5% | Small credit or small debit, depending on the partner |
| Funding currency, low rate | 0.5% | Pay roughly the gap, plus broker markup |
The figures are round examples, not quotes. Real policy rates change at scheduled meetings, and the pair's carry reprices when either bank moves. For euro pairs, one of the two inputs is published on the ECB monetary policy decisions page, where each Governing Council rate decision is posted. Traders who follow both central bank calendars rarely get surprised by a swap that changed overnight.
Interest rate differentials also explain the attractiveness of certain pairs over long stretches. A wide gap pulls capital toward the high-rate currency, and that sluggish flow quietly nudges the exchange rate in the carry trader's favour. That is why carry is the one corner of the currency market that resembles investing, and why it feels safe for long periods.
How a CFD trader earns or pays the carry through swap
You never receive a bank deposit on a CFD. The carry reaches you as the overnight swap, credited or debited at the daily rollover. Our guide to forex swap fees and the overnight charge covers rollover timing and the Wednesday triple.
Suppose you hold one standard lot, a notional 100,000 units, on a pair with a 4 percentage point differential in your favour. Gross carry is about 4,000 a year, or roughly 11 per calendar night. Broker markup trims that, so assume a credit of 8. With a pip worth about 10 on a standard lot, that is 0.8 of a pip per night, or 24 pips over thirty nights.
Now set that beside the pair's ordinary behaviour. A high-rate currency can fall 150 pips in a jittery session without any news that matters. That is 1,500, or roughly six months of carry, gone in an afternoon. The income is lumpy on the way in and the losses are violent on the way out. Short the high-rate currency instead and you pay more than the 8 per night, because the broker markup sits on the paying side. That charge is a cost that stacks on top of spread and commission, so shorting the high-rate side is an expensive way to wait.
Leverage magnifies both sides. Two standard lots double the nightly credit to 16 and double the 150-pip loss to 3,000, which is 6% of a 50,000 account. At that size the carry scarcely matters and the currency risk dominates.
Choosing currency pairs for a carry position
Not every pair offers useful carry. The ones worth a look share three features. The differential covers broker markup with something left over, liquidity keeps the spread tight, and the high-rate central bank looks settled. Our breakdown of the major currency pairs and how they trade explains which liquid pairs usually carry a meaningful gap.
The yen has been the classic funding currency for decades, because Japanese policy rates sat near zero while other economies paid several points more. Borrowing yen to buy higher-yielding currencies became so crowded that any shift in Bank of Japan policy sent those positions running for the exit at once. August 2024 showed the pattern. A modest Japanese rate rise landed alongside weak US data, and yen crosses dropped violently over a few sessions as the crowd unwound. The most popular funding currency is also the one that moves hardest when the trade reverses.
The low-rate side of a carry is often a safe-haven currency, and that pairing is what makes carry brittle. When markets turn skittish, the funding currency rises and the target currency falls, so both legs lose together. Hedge funds treat carry as one of several financial strategies and accept that trade-off at scale. Retail CFD traders meet the same arithmetic on a smaller notional with a stingy swap because of markup. The investor profiles differ, but the unwind arrives for everyone on the same day.
Unwind risk, currency risk and the other caveats
The main hazard is not that the carry turns negative. It is that everyone holding the trade leaves at once. Carry positions build up quietly while market volatility is low. Then the low-rate central bank hints at a hike, or a growth scare makes investors nervous, and each seller of the target currency triggers the next trader's stop. Weeks of carry vanish in days, and pairs that looked independent fall together. That clustering is why currency correlation and how to measure it belongs in any carry portfolio check. Two or three carry pairs are usually one bet on risk appetite.
The common mistakes are consistent:
- Treating the swap credit as income and ignoring the price. A nightly 8 is unremarkable beside a 1,500 drawdown.
- Sizing on the carry rather than on the stop, which tempts traders into clumsy oversizing.
- Holding stubbornly after the differential narrows. Once the gap is halved, the reason for the trade has gone.
- Ignoring rate meeting dates. A surprise hold or hike reprices the swap and the spot rate in the same minute.
Interest rate changes are the slow version of the same risk. If the target bank cuts twice and the funding bank hikes once, a 4-point gap can decelerate to 2 points within a year. The exchange rate usually prices that shift before the swap table does.
A checklist before you hold for the carry
- Confirm the current long swap on your platform in account currency per night, not in pips.
- Note both central banks' next meeting dates and what the market expects from each.
- Set the pair's typical weekly range beside a month of carry. If one ordinary week can erase three months of income, the position is lopsided.
- Place the stop from the chart, then size so the stop costs under 1% of equity. The carry does not enter the sizing.
- Write the exit condition in advance: a narrowing differential, a hawkish funding bank, or a defined jump in volatility.
- Check correlation with the rest of your book.
| Condition | Decision |
|---|---|
| Wide differential, both banks on hold, volatility low | Enter or hold at ordinary size |
| Funding bank turns hawkish | Halve size and tighten the stop |
| Target bank starts cutting | Exit on the next bounce |
| Volatility spikes and correlated pairs fall together | Exit now; do not wait for the swap |
The table is blunt on purpose. Carry rewards patience in calm markets and punishes hesitancy in disorderly ones, so decide the exit rules while the position is still making money.
Carry positions inside a prop-firm evaluation
Carry trades are slow, and evaluation rules are measured daily. A position that earns 8 a night and swings 1,500 in a day interacts badly with a daily loss limit. The swap credit does almost nothing for the total drawdown.
Pivex gives a carry trader some room. There is no clock on the attempt and no required count of trading days, so a slow position can run on its own schedule. Holding through the weekend is allowed. The total drawdown stays static instead of trailing equity, so a carry that has built a cushion does not have the floor raised beneath it. The daily loss allowance is the binding constraint, and it renews every day. Size each carry position so a bad unwind day stays inside that allowance with room to spare. On Pivex the built-in assistant keeps a running tally of your limits, which removes the ambiguity about how much room is left.
Next step: pick one pair with a wide differential, work out the nightly credit in account currency, and compare it with last month's weekly ranges. That number tells you plainly whether the carry is worth the currency risk. To run the position under evaluation limits, a one-step attempt with Pivex lets the trade run without a clock. The daily loss limit becomes the only timer you need to respect.
Related guides: forex swap fees and currency correlation.
Before participating, review Pivex's current program rules and decide whether a simulated proprietary trading evaluation fits your experience and risk limits. Participation does not guarantee a reward, income, or any particular trading result.