Carry Trade Calculator
Print| Net Interest Differential % | 0.00% |
The Carry Trade Calculator computes expected financial returns from a foreign exchange carry trade strategy. A currency carry trade involves borrowing capital in a low-interest-rate currency (the funding currency) and investing the proceeds in a high-interest-rate currency (the target currency) to harvest the net interest rate spread.
Because carry trades are typically executed using broker leverage, minor interest rate differentials can generate substantial returns on equity. However, unexpected exchange rate depreciations can quickly offset interest gains, making risk management essential.
Carry Trade Formulas
Carry trade profits consist of net interest rate yields plus capital gains or losses from spot exchange rate shifts:
1. Net Interest Differential Yield
Annual Interest Yield ($) = Total Leveraged Position × (Target Interest Rate % - Funding Interest Rate %)
2. Exchange Rate Shift Gain / Loss
Exchange Rate Impact ($) = Total Leveraged Position × % Change in Spot Exchange Rate
3. Total Return on Equity (ROE)
Total Carry Profit ($) = Annual Interest Yield ($) + Exchange Rate Impact ($)
Return on Equity (%) = (Total Carry Profit / Initial Margin Deposit) × 100
Popular Carry Trade Currency Pair Matrix
Global macro traders evaluate central bank policy rate differentials to identify high-yield carry trade pairs:
| Currency Pair | Funding vs. Target Currency | Interest Differential & Volatility Profile |
|---|---|---|
| USD / JPY | Borrow JPY (Low Rate) → Invest USD (High Rate) | Classic G10 carry trade. High liquidity, positive interest spread, vulnerable to Bank of Japan interventions. |
| AUD / JPY | Borrow JPY (Low Rate) → Invest AUD (Commodity Yield) | High-beta risk-on trade. Highly correlated with global equity rallies and commodity demand. |
| EUR / CHF | Borrow CHF (Low Rate) → Invest EUR (Higher Rate) | Regional European carry trade. Low interest differential, heavily influenced by Swiss National Bank safe-haven flows. |
| USD / MXN or BRL | Borrow USD/JPY → Invest Emerging Market (MXN/BRL) | Ultra-high yield differential (8%+ spread). High currency volatility and emerging market geopolitical risk. |
Step-by-Step Carry Trade Example
Suppose a forex trader executes a USD/JPY carry trade with the following parameters:
- Initial Cash Margin Equity: $10,000
- Leverage Ratio: 10x (Total Position Size = $100,000)
- Target Currency Rate (USD): 5.25% per year
- Funding Currency Rate (JPY): 0.25% per year
- Spot Exchange Rate Movement: 0% (Exchange rate remains stable)
Step 1: Compute Net Interest Rate Differential
Net Interest Spread = 5.25% - 0.25% = 5.00% per year
Step 2: Calculate Annual Dollar Interest Yield
Annual Yield = $100,000 × 5.00% = $5,000
Step 3: Compute Return on Initial Margin Equity
Return on Equity = ($5,000 / $10,000) × 100 = 50.0% ROE
Result: By deploying 10x leverage, the trader captures a 50.0% annual Return on Equity from the 5% interest rate spread, assuming the exchange rate remains neutral.
Frequently Asked Questions (FAQ)
What is Uncovered Interest Rate Parity (UIP)?
Uncovered Interest Rate Parity is an economic theory stating that high-interest-rate currencies should depreciate against low-interest-rate currencies by an amount equal to the interest differential, eliminating carry trade profits. In reality, UIP frequently fails in the short-to-medium term.
What is a “Carry Trade Unwind”?
A carry trade unwind occurs when global market risk aversion surges or low-yield central banks raise interest rates rapidly. Traders panic-close positions, buying back the funding currency and causing sudden, sharp currency rallies.
How does broker leverage amplify carry trade returns and risks?
Leverage multiplies the base interest spread. While 10x leverage converts a 3% interest spread into a 30% annual return on equity, a minor 3% adverse movement in spot exchange rates wipes out 30% of account equity.
What are Forex Swap Rates / Rollover Fees?
In retail forex trading, carry trade interest is credited or debited daily as Rollover Swap Rates applied to open positions held overnight at 5:00 PM EST.