Carry Trade Calculator

What is a Carry Trade?

A carry trade is a forex trading strategy where you borrow money in a currency with a low interest rate and invest it in a currency with a higher interest rate. The goal is to profit from the interest rate differential between the two currencies. This strategy is popular among forex traders because it allows them to earn passive income from holding positions overnight.

For example, if you go long AUD/JPY (buy Australian Dollars, sell Japanese Yen), you are effectively borrowing in Yen (low interest rate around 0.1%) and investing in Australian Dollars (higher interest rate around 4.35%). The difference of approximately 4.25% annually is your carry trade profit, paid to you daily as swap or rollover.

How to Use This Carry Trade Calculator

1. Select Long Currency: Choose the currency you want to buy (the higher-yielding currency). Enter its current interest rate.
2. Select Short Currency: Choose the currency you want to sell (the lower-yielding currency). Enter its current interest rate.
3. Enter Position Size: Input your position size in base currency units. A standard lot is 100,000 units.
4. Select Holding Period: Choose how long you plan to hold the position to see total interest earned.
5. Optional: Add FX Scenario: Enter an expected exchange rate change to see net profit including currency appreciation or depreciation.

Understanding Carry Trade Calculations

The carry trade profit is calculated using these formulas:

Interest Differential = Long Rate - Short Rate

Daily Interest = Position Size × (Interest Differential / 365)

For a 100,000 AUD/JPY position with 4.35% AUD rate and 0.1% JPY rate:

Daily Interest = 100,000 × (4.25% / 365) = $11.64 per day

Key Carry Trade Concepts

• Positive Carry: When you earn interest because the long currency has a higher rate than the short currency. This is the ideal scenario for carry traders.
• Negative Carry: When you pay interest because the long currency has a lower rate. Avoid this unless you expect significant currency appreciation.
• Rollover/Swap: The daily interest credit or debit applied to your account for holding positions overnight. Brokers typically apply swap at 5 PM New York time.
• Break-Even Move: The percentage the exchange rate must move against you to wipe out your interest gains. A higher interest differential provides more cushion.
• Triple Swap Wednesday: Most brokers charge triple swap on Wednesday to account for weekend holding.

Popular Carry Trade Pairs

The most popular carry trade pairs involve high-yielding currencies against low-yielding ones:

• AUD/JPY: Classic carry trade pair. Australian Dollar vs Japanese Yen offers consistent positive carry.
• NZD/JPY: New Zealand Dollar vs Japanese Yen. Similar to AUD/JPY with slightly higher volatility.
• MXN/JPY: Mexican Peso vs Japanese Yen. High yield but also higher risk due to emerging market volatility.
• USD/CHF: US Dollar vs Swiss Franc. Lower differential but more stable pair.
• TRY/JPY: Turkish Lira vs Japanese Yen. Highest yield but extreme currency risk.

Risks of Carry Trading

While carry trades can provide steady income, they come with significant risks:

• Exchange Rate Risk: Currency depreciation can quickly wipe out months of interest gains. High-yielding currencies often depreciate during risk-off periods.
• Interest Rate Changes: Central banks can cut rates unexpectedly, reducing or eliminating your carry.
• Leverage Risk: Carry trades are often done with leverage, amplifying both gains and losses.
• Liquidity Risk: During market stress, spreads widen and it may be difficult to exit positions.
• Carry Trade Unwind: When many traders exit carry trades simultaneously, it causes rapid currency moves.

Frequently Asked Questions

What is the best currency pair for carry trading?

The best carry trade pair depends on current interest rate differentials and your risk tolerance. AUD/JPY and NZD/JPY are popular choices for their balance of yield and stability. Emerging market pairs like MXN/JPY or ZAR/JPY offer higher yields but with significantly more risk.

How much can I earn from carry trading?

Earnings depend on the interest rate differential, position size, and holding period. With a 4% differential and a standard lot (100,000 units), you could earn approximately $4,000 per year in interest alone. However, exchange rate movements can significantly impact your total return.

Is carry trading profitable?

Carry trading can be profitable during stable market conditions when high-yielding currencies maintain their value. However, during risk-off periods or market crises, carry trades often lose money as traders flee to safe-haven currencies. Long-term success requires careful risk management and timing.

When should I avoid carry trades?

Avoid carry trades during periods of high market volatility, before major central bank announcements, or when the high-yielding currency is showing signs of weakness. Also be cautious when the interest rate differential is narrowing, as this reduces your buffer against adverse exchange rate moves.

How do broker swap rates differ from central bank rates?

Broker swap rates are based on interbank lending rates, which are influenced by but not identical to central bank rates. Brokers also add their own markup. The actual swap you receive may be 0.5-2% lower than the theoretical interest differential. Always check your broker's swap rates before entering a carry trade.