USD/JPY was observed around 157.45 at 09:30 on Tuesday, September 22, remaining slightly beneath the 61.8% Fibonacci retracement level of 157.536. The pair is consolidating following the Bank of Japan’s 25-basis-point increase to 1.25% on September 18, which resulted in a notable fluctuation between 156.656 and 158.05. The yen experienced a decline exceeding 2% last week, subsequently stabilising around 157 on Monday as Japan commenced a three-day holiday. The thesis for this forecast is straightforward and elucidates all subsequent points. The Bank of Japan raised its policy rate to its highest level since April 1995, yet the yen weakened nonetheless. That occurred due to the insufficient closure of the rate gap to have a significant impact. The Federal Reserve’s target range is established at 3.75%–4.00% following its increase on September 16, resulting in a differential of 275 basis points between the Fed’s upper limit and the Bank of Japan’s 1.25%. Measured from the Fed’s range midpoint of 3.875%, the gap stands at 262.5 basis points. A quarter-point move in Tokyo, juxtaposed with a Federal Reserve anticipated to raise rates again in December, does not disrupt a carry trade of that magnitude. The specifics of the BOJ decision exacerbated the situation for the yen. The board reached a decision with a vote of 7-2, where members Toichiro Asada and Ayano Sato expressed dissent, advocating for a hold position. Governor Kazuo Ueda refrained from committing to additional rate hikes, emphasising that the Bank of Japan is dedicated to modifying the level of monetary accommodation as circumstances change, while also indicating that supportive financial conditions are anticipated to persist. The 10-year JGB yield experienced a decline, while the Nikkei 225 increased by 1.38%, concluding at 65,019. Core CPI eased to 1.7% in August from 1.8% in July, which diminishes the argument for a swift subsequent action.
The question of intervention now takes precedence. Japanese authorities have intervened multiple times in 2026, expending approximately ¥5.48 trillion in one instance after the pair surpassed 160. The Ministry of Finance has been attempting to establish a cap on USD/JPY within the 158–160 range. With Japan on holiday and liquidity thin, traders remain vigilant, as Tokyo has historically leveraged such conditions to take action. The forecast bias indicates a bullish sentiment on the pair, albeit with a defined upper limit. Support is positioned at 157.18 and 156.656. Resistance is observed at 158.05, followed by 159.45, and subsequently at the 160 intervention zone. The September 18 decision serves as the pivotal moment for this forecast, and its framework elucidates the yen’s seemingly paradoxical response. The Bank of Japan raised its uncollateralized overnight call rate to 1.25% from 1.00% following the conclusion of a two-day meeting. That represents the highest policy rate since 1995 and marks the sixth increase following the BOJ’s departure from its negative interest rate policy in March 2024. It occurred merely three months following the last increase, marking the briefest interval between hikes since 1990. The action aligned with projections. The yen experienced a decline regardless of other factors. The USD/JPY rebounded above 157 following the decision, with the currency experiencing a decline of over 2% throughout the week. Three factors influenced that reaction.
The initial action was the vote. The board reached a decision with a vote of 7-2, where Toichiro Asada and Ayano Sato expressed dissent, advocating for a position of maintaining the current course. A two-member dissent regarding a hike indicates that the committee may be approaching its limits more closely than the markets had previously anticipated. In contrast, the Bank of England exhibited a hawkish division, with three members dissenting in favour of an interest rate hike. The BOJ’s division was characterised by a dovish stance. The second was guidance. Governor Ueda did not commit to additional rate increases. He stated that the BOJ is dedicated to increasing rates and modifying accommodation as economic conditions change, while observing that supportive financial conditions are anticipated to persist to foster growth. That is a central bank allowing itself the flexibility to take a break. The third factor was inflation. Core CPI eased to 1.7% in August from 1.8% in July, falling short of the 2% target. A central bank increasing rates amidst slowing inflation presents a less compelling argument for sustaining such actions. The market context exerted additional pressure. Japanese equities experienced a notable rally, as the Nikkei 225 increased by 1.38% to reach 65,019, thereby extending its winning streak to three consecutive sessions. The 10-year JGB yield experienced a decline instead of an increase. When a rate hike results in a lower long yield and a higher stock index, the market interprets the decision as dovish.
The political context is also pertinent. The hike followed heightened pressure from Washington, including appeals from Treasury Secretary Scott Bessent advocating for elevated Japanese rates. That pressure is directed toward bolstering the yen, yet it has proven ineffective. BOJ board member Hajime Takata, recognised for his hawkish stance, has characterised 2026 as a pivotal moment, indicating that policy will adapt to both domestic and global conditions rather than adhering to a predetermined trajectory. He proposed raising the rate to 1.25% at the July meeting, but the motion was rejected by a vote of 8-1. For the forecast, the hike is already incorporated into the pricing. The upcoming catalyst is the meeting scheduled for October 29–30, which will feature a new Outlook Report. Interest rate differentials exert a significant influence on USD/JPY, more so than on any other currency pair, and the prevailing spread elucidates the inability of the yen to mount a rally. The Federal Reserve raised its target range to 3.75%–4.00% on September 16, marking its first hike since 2023, and indicated that at least one more increase is anticipated this year. Markets now assign a 90% probability to an additional rate hike in December, an increase from the 80% probability observed one week prior. Sixteen of 18 Federal Reserve officials indicated the likelihood of one additional rate increase before the end of the year. The Bank of Japan increased its rate to 1.25% two days later. The disparity between the upper limit set by the Federal Reserve and the policy rate of the Bank of Japan stands at 275 basis points. From the Fed’s midpoint, it stands at 262.5 basis points. For a carry trader, this represents the annual yield pickup derived from borrowing yen and holding dollars, prior to the application of leverage. At typical leverage levels, this generates double-digit returns provided that the exchange rate remains stable or shifts in favour of the carry trade.
The bond market spread substantiates this observation. The U.S. 10-year Treasury yield concluded Monday at 4.96%, following a peak of 5.04% in anticipation of the Fed decision, marking its highest level since 2007. The 2-year yield currently stands at 4.76%. The Japanese 10-year yield reached 3% earlier in September, marking a multi-decade high for Japan; however, this still results in a spread near 200 basis points on the long end. The direction holds greater significance than the level. Both central banks raised their rates in the same week by the same magnitude, resulting in no change to the existing gap. However, the Fed’s projected trajectory indicates a high likelihood of further tightening at 90%, whereas the BOJ’s stance reflects a more cautious approach following a 7-2 vote and a decline in core inflation. The anticipated spread in three months is expected to be wider, rather than narrower. Japanese policymakers are attempting to alter that equation. BOJ officials anticipate that inflation will persist above the 2% target in the forthcoming years, with projections indicating that price growth may near 3% by the beginning of next year. If that materialises, the BOJ would need to accelerate its rate hikes beyond the current pace of two increases per year. Takata has advocated for a flexible, data-driven strategy and cautioned about increasing risks of overheating. For the forecast, the rate gap serves as the foundational support for USD/JPY. It serves as the rationale for the buying of dips and explains why a policy rate at a 31-year high has led to a depreciation of the yen. Only a Federal Reserve pause or an accelerated Bank of Japan path alters the situation.
