The 'carry trade' is a long-standing financial strategy where investors borrow money in a currency with low interest rates, such as the Japanese yen, and convert it into a currency with higher interest rates to capture the difference in yield. Because Japan has historically maintained ultra-low interest rates, the yen has frequently served as the primary funding currency for these global trades.

While the strategy can be highly profitable during periods of market stability, it is inherently sensitive to currency fluctuations. If the yen strengthens significantly against the currency in which the investor has invested, the cost of repaying the loan rises, potentially erasing profits or leading to substantial losses. This risk is compounded by the 'unwinding' of these trades, where investors rush to sell their assets and buy back yen to pay off their loans, which can trigger broader market volatility.

Financial analysts note that the carry trade is essentially a bet on low volatility. When market conditions shift—such as when the Bank of Japan adjusts interest rate policy or global economic uncertainty increases—the sudden reversal of these positions can lead to rapid asset price declines. The Financial Times highlights that while the strategy is a staple of global finance, its reliance on specific interest rate differentials makes it a precarious tool that requires careful monitoring of central bank policies and currency exchange rates.