Carry trade

What carry trade means

A carry trade is a position built to earn the gap between two interest rates. The trader funds the position in a currency that pays a low rate and holds a currency that pays a higher rate. The difference between what is earned and what is paid is called the carry. If the exchange rate stays put, the carry is the profit.

The idea is old and not limited to currencies. Investors can also borrow cheaply in one market and hold a higher-yielding asset in another, such as bonds or dividend stocks. In retail forex and CFD trading, though, the phrase almost always refers to buying a high-yielding currency against a low-yielding one and holding the position for days, weeks or months rather than minutes.

The currency that is borrowed or sold is called the funding currency. The currency that is bought is called the target currency. Historically the Japanese yen and the Swiss franc have often played the funding role because their policy rates were low for long periods, while currencies of countries with higher policy rates have been targets. Those roles change as central banks change course.

How it works

In the interbank market, every currency position implicitly involves borrowing one currency and lending another. Holding the higher-yielding currency earns its rate, and the currency you are short costs its rate. Retail brokers turn this into a daily credit or debit, usually called swap, rollover or overnight financing, applied when a position is held past the daily cut-off time.

The basic steps look like this:

1. Identify two currencies with a clear gap between their short-term policy rates.
2. Go long the higher-yielding currency against the lower-yielding one, for example long the target and short the funding currency.
3. Hold the position and receive the net daily financing, if the broker passes it through as a credit.
4. Close the position later, when the exchange rate has produced a gain or a loss on top of the accumulated carry.

Total result = accumulated carry + (or minus) the change in the exchange rate, minus spread and any financing markup. The carry is small and steady. The exchange rate move is larger and uncertain. That imbalance is the heart of the strategy.

A worked example

These numbers are illustrative only. Suppose a target currency pays a policy rate of 5.0 percent a year and the funding currency pays 0.5 percent. The raw rate gap is 4.5 percent a year.

• Position size: 100,000 units of the target currency, worth 100,000 at the starting rate.
• Gross annual carry: 100,000 x 4.5 percent = 4,500 per year.
• Per day: 4,500 / 365 is roughly 12.3 per day, before the broker's markup.
• If the broker keeps a share of the differential, a credit of perhaps 9 per day is more realistic.

Now add the exchange rate. If the target currency falls 3 percent over the year, the loss on the position is 3,000. Net: 4,500 - 3,000 = 1,500 before costs. If it falls 6 percent, the loss is 6,000 and the net is minus 1,500, even though the carry was collected every single day. A sudden 8 percent drop in a few days would erase almost two years of carry.

Why it matters

Carry explains why some currencies drift upward in calm markets and then fall sharply in stressful ones. Many investors hold the same type of position at the same time, so when risk appetite collapses they close together. The target currency drops, the funding currency rallies, and the losses arrive faster than the carry ever accumulated. Traders sometimes describe this as picking up coins in front of a steamroller.

For retail traders it matters for a second reason: the swap line on a broker's fee schedule decides whether you actually receive the carry. Some brokers apply wide markups so that holding a position in either direction costs money. The headline interest rate gap and the credit you receive can be quite different numbers.

Leverage amplifies everything. A carry of a few percent a year looks attractive on a leveraged account, but a small adverse price move is amplified by the same factor.

How to use it in practice

• Check the current policy rates of both central banks and the direction they are expected to move. A narrowing gap shrinks the carry.
• Open the broker's swap table for the exact pair and read the long and short values. Confirm they are positive for the direction you intend to hold.
• Note the rollover time and the triple-swap day, usually midweek for spot forex.
• Compare expected carry with the pair's typical daily range. If one ordinary week of price movement exceeds a year of carry, the trade is mostly an exchange rate bet.
• Set a maximum loss before entering, and size the position so that loss is acceptable.
• Review the position when central bank meetings or major data are due.

Common mistakes and misconceptions

• Treating carry as income. It is only one component. The price change can be far larger and negative.
• Assuming the quoted rate gap is what the broker pays. Swap includes markups and can be negative in both directions.
• Ignoring leverage. High leverage turns a modest adverse move into a margin call before the carry can accumulate.
• Believing low volatility lasts. Carry trades tend to look best just before a volatility spike.
• Forgetting that rate gaps change. When a central bank cuts or its peer hikes, the trade can lose its reason to exist.
• Confusing a carry trade with a hedged position. Without a hedge, currency risk is fully open.

Risks and limitations

Carry trades can produce large losses in a short time, especially when many participants unwind together. Gaps over weekends or around news can jump past stop-loss levels, so the exit may be worse than planned. With leveraged CFDs or margin forex, losses can exceed what you intended to risk and may exceed the deposit in some account types. Rules on negative balance protection and leverage vary by jurisdiction.

Interest rate gaps are not guarantees of future returns, and the relationship between rate differentials and currency moves is weak and unstable. Nothing here is a recommendation to trade a particular pair.

How Brokeli looks at it

When we review a broker, we look at how swap or financing is calculated, whether the rates are published, and how long positions are treated across the rollover. Carry only makes sense when overnight costs are transparent, so we read the fee schedule from the published research snapshot rather than a marketing page. We also note account types such as swap-free accounts, because they change the economics of holding positions for long periods.