Why the Japanese Yen Keeps Falling Despite Every Reason to Rally

The Japanese yen continues to defy conventional market logic. Despite a growing list of fundamental reasons that should support a stronger currency, the yen remains under persistent selling pressure against the US dollar. Traders and analysts are left questioning what it will take to reverse the trend.

What Should Be Supporting the Yen

Several factors typically point to currency strength. Japan’s current account surplus remains substantial, the Bank of Japan has begun signaling a potential shift away from ultra-loose monetary policy, and global risk sentiment has shown periods of caution that usually benefit the yen as a safe haven. Yet USD/JPY continues to trade near multi-decade highs.

The disconnect between fundamentals and price action has become a defining feature of the forex market in 2025. The yen has ignored higher Japanese government bond yields, a narrowing interest rate differential with the US, and even occasional intervention warnings from Japanese authorities.

The Carry Trade Dominance

One of the primary forces keeping the yen weak is the persistent popularity of the yen carry trade. Investors continue to borrow yen at low interest rates and invest in higher-yielding currencies, particularly the US dollar. This structural flow of selling yen for higher returns overwhelms any fundamental support.

Even as the Bank of Japan has adjusted its yield curve control policy, the actual interest rate differential between Japan and the US remains wide enough to keep the carry trade profitable. Until that differential narrows significantly, the yen faces an uphill battle.

Market Positioning and Momentum

Speculative positioning in the futures market shows net short yen positions remain elevated. Momentum traders have little incentive to reverse course when the trend is so clearly defined. Each attempt at a yen rally has been met with fresh selling, creating a self-reinforcing cycle.

Japanese authorities have verbally intervened multiple times, but without coordinated action or actual market intervention, these statements have had diminishing impact. The market has learned to look past warnings that lack follow-through.

What Could Change the Dynamic

A significant shift in Bank of Japan policy, such as a rate hike or a more aggressive reduction in bond purchases, could alter the calculus. Similarly, a sharp downturn in global risk appetite or a US economic slowdown that forces the Federal Reserve to cut rates aggressively would narrow the yield gap.

For now, the yen remains trapped in a cycle where good news for Japan is bad news for the yen. Until the carry trade loses its appeal or Japanese policymakers take more decisive action, the path of least resistance is likely lower.

Conclusion

The Japanese yen’s persistent weakness despite supportive fundamentals highlights the power of market flows and positioning over traditional valuation metrics. Traders should watch for any shift in Bank of Japan rhetoric or US economic data that could break the current dynamic. Until then, betting against the yen remains a popular and profitable trade.

FAQs

Q1: Why is the yen weakening if Japan has a trade surplus?
A trade surplus typically supports a currency, but in the yen’s case, the massive outflow from carry trades and portfolio investment abroad overwhelms the surplus effect. The surplus alone is not enough to offset selling pressure from investors borrowing yen to invest overseas.

Q2: Will the Bank of Japan intervene to support the yen?
The BOJ has historically intervened only when volatility becomes extreme or when the yen’s decline threatens financial stability. Verbal warnings are common, but actual intervention requires a coordinated decision with the Ministry of Finance and is usually reserved for crisis scenarios.

Q3: How long can the yen carry trade continue?
The carry trade remains profitable as long as the interest rate differential between Japan and the US stays wide. If the Federal Reserve cuts rates or the BOJ raises rates, the trade becomes less attractive. However, both scenarios are uncertain, and the carry trade could persist for months or even years.