BOJ’s First Rate Hike in 31 Years Gains Momentum, as Yen Carry Trade Unwind Fears Collide With Easing Oil Prices

BOJ Moves Back Toward Tightening, Highest Interest Rate in 31 Years Within Reach
Expectations for Sustained U.S.-Japan Rate Differential Drive Record Yen Short Positions
Stabilizing Oil Prices Amid Hopes for an End to the War Add Uncertainty to Tightening Path

The Bank of Japan’s upcoming rate decision has emerged as a critical inflection point for global liquidity flows. Markets are increasingly pricing in the possibility that the central bank will raise its policy rate from the current 0.75% to 1.0% at this monetary policy meeting. As expectations for further tightening in Japan gain traction, investor attention is shifting toward the future of the yen carry trade—the phenomenon in which funds borrowed cheaply in yen are repatriated to Japan en masse. Global hedge funds have expanded bearish yen positions to record levels, meaning that if the BOJ proceeds with tightening, pressure could mount for a reallocation of liquidity that has flowed into global markets. At the same time, international oil prices have rapidly stabilized following the tentative agreement between the United States and Iran to end hostilities. Should inflationary pressures ease, the pace of monetary tightening could also be affected.

BOJ Policy Meeting Concludes Today, Markets Expect 25-Basis-Point Rate Increase

According to Kyodo News on June 16, the two-day Monetary Policy Meeting held from June 15 to 16 is being conducted without a BOJ governor for the first time in history after Governor Kazuo Ueda was hospitalized for treatment of an infected pancreatic cyst. Ueda has submitted his views in writing but will not participate in voting. Deputy Governor Shinichi Uchida will instead conduct the post-meeting press conference.

Markets broadly expect the BOJ to raise its policy rate by 25 basis points, from 0.75% to 1.0%. If implemented, Japan’s benchmark rate would reach its highest level since 1995, marking a 31-year peak. The outlook is driven largely by more than 100 days of instability in the Middle East and the resulting inflationary pressures across the global economy. The prolonged Iran conflict and disruptions stemming from the closure of the Strait of Hormuz have shaken energy and raw-material supply chains for months, reigniting upward pressure on prices.

The BOJ had initially maintained a cautious stance on rate increases due to concerns over slowing economic growth, but it is now believed to view inflation risks as the greater threat. Japan’s consumer price index (CPI), calculated by the BOJ, rose 2.8% year-on-year in April, accelerating from 2.5% in March. The Corporate Goods Price Index, a key measure of producer prices, climbed 6.3% in May, marking the fastest pace of increase in three years and two months. Although international oil prices have moderated somewhat following the tentative agreement to end hostilities between the United States and Iran, the BOJ is believed to be factoring in the likelihood that previously accumulated increases in raw-material costs will continue to filter through to consumer prices with a lag.

Global Hedge Funds Place Record Bets Against the Yen

Global hedge funds, however, continue to expand positions betting on a weaker yen. Their view is that Japan’s capacity for additional tightening remains limited. The central thesis behind these speculative positions is that the Federal Reserve’s higher-for-longer stance will persist, while Japan will struggle to accelerate rate hikes due to economic headwinds. Data from the U.S. Commodity Futures Trading Commission (CFTC) show that leveraged funds’ net short yen positions recently exceeded 115,000 contracts, the highest level since 2017. Despite the BOJ’s efforts to normalize monetary policy and repeated warnings from Japan’s Ministry of Finance regarding intervention in foreign-exchange markets, investors continue to bet against the yen, assigning greater probability to the continuation of the U.S.-Japan interest-rate differential than to aggressive policy action from Tokyo.

A research team led by J.P. Morgan Chief Strategist Junya Tanase stated in an investment note that “the market has already effectively priced in both the risk of Japanese foreign-exchange intervention and further monetary tightening,” adding that “unlike past events that triggered panic in financial markets, the current policy rebalancing process is not a surprise.” The yen is currently trading around ¥160 per dollar, a level that historically prompted intervention by Japanese authorities.

The risk emerges if such positioning collides with tighter-than-expected BOJ policy. Should Japanese interest rates rise more rapidly than anticipated or the yen strengthen significantly, the yen carry trade could face substantial unwinding pressure. Investors who borrowed yen to purchase overseas assets would confront both higher funding costs and mounting foreign-exchange losses, making deleveraging increasingly unavoidable.

The implications of a carry trade unwind extend far beyond the currency market. For decades, the yen has served as one of the world’s primary low-cost funding currencies. If liquidity begins flowing back into Japan, a broad reallocation of capital could affect U.S. technology stocks, emerging-market equities, and cryptocurrency markets alike. Such a shift could drain liquidity not only from emerging economies but also from U.S. asset markets, amplifying volatility across the global financial system.

Cryptocurrency markets, which have also benefited from abundant liquidity, would likely face significant pressure if the carry trade were unwound on a large scale. The current environment bears striking similarities to the period immediately preceding the BOJ’s July 2024 rate hike. At that time, short yen positions had likewise reached record levels. After the BOJ raised rates on July 31, 2024, the yen surged, volatility increased across U.S. equity markets, Japan’s Nikkei index fell sharply, and Bitcoin prices tumbled. Investors are increasingly wary of a repeat of that scenario.

ECB Moves First With Rate Increase, Markets See Rising Odds of Fed Tightening This Year

From a broader global monetary-policy perspective, a BOJ rate hike is increasingly viewed as a foregone conclusion. The European Central Bank (ECB) moved preemptively last week, raising rates from 2.0% to 2.25% in response to renewed inflation risks. The increase marked the ECB’s first rate hike in 33 months since September 2023. Just a year ago, the ECB was cutting rates repeatedly to support economic growth. However, surging energy prices linked to the Iran conflict and eurozone inflation returning above 3% forced policymakers to reverse course. Markets do not expect the latest increase to be a one-off move. According to a Bloomberg survey of economists conducted last month, the ECB is expected to deliver two additional 25-basis-point hikes, in June and September of this year.

The Federal Reserve’s tightening clock is also accelerating. While the Fed is not widely expected to raise rates immediately in June or July, markets are assigning increasing probability to a rate increase later this year. Reuters reported that the probability of a Fed rate hike in October has risen to 60%. Only a few months ago, December was considered the most likely timing for any additional increase, but expectations have since shifted forward to October. The resilience of the U.S. labor market is also strengthening the case for tighter monetary policy.

Meanwhile, U.S. producer prices are rising at their fastest pace in more than three years, increasing the likelihood of further Fed tightening. On June 11, the U.S. Department of Labor reported that the Producer Price Index (PPI) rose 6.5% year-on-year in May. That marked the highest annual increase since November 2022, when the figure stood at 7.4%. The reading exceeded Bloomberg forecasts and was up from April’s 6.0% pace. On a monthly basis, producer prices rose 1.1%, substantially above the market consensus of 0.7%. The closure of the Strait of Hormuz drove energy costs higher, feeding through into broader cost pressures. Bloomberg noted that “the negative effects of the energy price shock on the U.S. economy are becoming increasingly significant.”

The key variable for monetary policymakers is the recent stabilization of oil prices following progress toward ending the conflict. As the United States and Iran reached a tentative agreement to halt hostilities, concerns over supply-chain disruptions in the Middle East have eased rapidly. On June 15, both Brent crude and West Texas Intermediate (WTI) crude prices fell by 3% to 4%. A substantial portion of the gains recorded during the conflict has now been erased, reflecting expectations that tensions in the Middle East will no longer pose a severe threat to oil supplies.

The geopolitical risk premium previously embedded in energy markets is also shrinking quickly. Stable oil prices help alleviate one of the most sensitive inflationary pressures confronting major central banks. Because energy costs affect logistics expenses, manufacturing costs, and food prices across the economy, lower oil prices are likely to contribute to slower consumer inflation over the coming months. That, in turn, could help calm inflation concerns that intensified during the prolonged conflict.