How Carry Trades Work
A carry trade involves borrowing money in a currency with low interest rates (like the Japanese yen or Swiss franc) and investing the proceeds in a currency offering higher rates (like the Australian dollar or Mexican peso). If you borrow yen at 0.5% and invest in Australian dollar assets yielding 5%, you earn a 4.5% spread, assuming exchange rates remain stable. Institutional investors and hedge funds execute carry trades on massive scales.
The Yen Carry Trade and Currency Markets
Japan's prolonged ultra-low interest rates made the yen the world's most popular funding currency. Massive yen carry trades create selling pressure on the yen, contributing to yen weakness. However, during risk-off events like financial crises, carry trades unwind simultaneously as traders rush to repay yen-denominated loans. This triggers sharp yen appreciation; during the 2008 crisis, the yen surged over 20% against the dollar in weeks.
Risks for Individual Investors
Retail forex swap trading is essentially a personal carry trade. High-yielding currencies often belong to economically or politically unstable countries. The Turkish lira lost over 80% against the yen between 2018 and 2023, far exceeding any interest rate advantage. Carry trades are described as 'picking up pennies in front of a steamroller' because profits accumulate slowly through interest differentials while losses from currency crashes arrive suddenly and catastrophically.