Why does the market remain bearish on the yen despite the Bank of Japan's gradual interest rate hikes?

On December 19th, the Bank of Japan (BOJ) as scheduled raised its benchmark interest rate by 25 basis points to 0.75%, reaching a new high since 1995. This decision was expected to boost the yen, but in reality, the opposite occurred—the US dollar strengthened against the yen, leaving investors clearly puzzled.

Weak Rate Hike Signal, Market Expectations Fall Short

Governor Kazuo Ueda indeed stated in the policy statement that if economic and inflation prospects meet expectations, the central bank will continue to raise interest rates. However, the key issue is the lack of a clear timetable. When asked about the next rate hike, Ueda chose to be vague, emphasizing the difficulty in pre-determining the neutral interest rate level (target range of 1.0% to 2.5%) and plans to adjust flexibly based on the situation.

For the market, this attitude is interpreted as the policy leaving too much room for discretion. Felix Ryan, a strategist at ANZ Bank, pointed out that although the BOJ has started a rate hike cycle, the USD/JPY has not fallen accordingly, reflecting a lack of clear expectations among investors regarding the pace and magnitude of future BOJ rate hikes.

Interest Rate Differential Dilemma Suppresses Yen Appreciation

In the context of uncertain rate hike expectations, the interest rate differential in economic fundamentals has become a decisive factor. The Federal Reserve is currently in a rate-cutting cycle, while Japan is tightening policy but at a slow pace. This interest rate gap exerts pressure on the yen.

ANZ Bank forecasts that by the end of 2026, the USD/JPY exchange rate will reach 153, further above current levels. The bank believes that even if the BOJ continues to raise rates in 2026, the yen will still perform weakly against a basket of G10 currencies, as the interest rate advantage is insufficient to support yen appreciation.

It is worth noting that this exchange rate trend also indirectly affects other currency pairs. The USD/CAD exchange rate faces similar issues with interest rate differentials and central bank policy directions, as investors worldwide reassess the relative attractiveness of different currencies.

Market Expectations vs. Central Bank Hints

Masahiko Loo, a strategist at Dreyfus Investment Management, offered another perspective: the market might interpret this rate hike as dovish, which in turn could increase short-term volatility of the yen. The firm maintains a long-term target of 135-140 for USD/JPY, citing the Federal Reserve’s accommodative policy and Japanese investors increasing foreign exchange hedging ratios from historical lows.

The overnight index swap (OIS) market expectations show that investors generally believe the BOJ will not raise rates to 1.00% until Q3 2026. This implies nearly 18 months until the next rate hike.

How Can the Central Bank Reverse Market Pessimism?

Nomura Securities provides key insights: only when the BOJ governor hints that the next rate hike could be brought forward to April 2026 or earlier will the market interpret this as a genuine hawkish signal, triggering yen buying. Otherwise, with no significant upward revision to the neutral rate estimate, it will be difficult for the market to believe that the terminal rate will rise substantially based on current guidance.

In other words, Ueda needs to further clarify the path of rate hikes to change the market’s pessimistic attitude toward the yen. The current policy statements are too vague, which instead amplifies market uncertainty.