The US Treasury stepped into the currency market on Friday to support the battered Japanese yen, marking Washington’s first intervention alongside Tokyo in more than a decade, the Financial Times reported. The move comes as the yen languishes near 40-year lows, prompting coordinated action between the world’s largest and third-largest economies to stabilize the troubled currency.

The Federal Reserve Bank of New York conducted a sale of euros to buy yen on behalf of the Treasury through Goldman Sachs and Morgan Stanley, the FT reported, citing people familiar with the matter. The reported action marks the US Treasury’s first direct support for the yen since 2011, when it coordinated with fellow G7 nations to stabilize markets after Japan’s earthquake and tsunami disaster.

Earlier on Friday, the US Treasury informed a number of banks that it might intervene in the yen market and that they should “stand ready for future action,” a source familiar with the matter told Reuters. The advance warning to financial institutions signaled the seriousness of Washington’s concerns about the yen’s dramatic decline and its potential impact on global financial stability.

Treasury Secretary’s Notepad Reveals Intervention Scale

A Reuters photo of US Treasury Secretary Scott Bessent’s notepad during a cabinet meeting at Camp David in Maryland showed that he was contemplating US purchases of $5 billion to $10 billion worth of Japanese yen. The notepad in the photo, taken over Bessent’s shoulder during an on-the-record portion of the meeting, bears the underscored words: “To Do” followed by “Buy Japanese Yen (JPY) $5-10 bil.”

The candid glimpse into Treasury planning provides rare insight into the scale of intervention being considered by US monetary authorities. The Financial Times report did not indicate any specific amounts of yen purchased during Friday’s intervention, and the actual execution may have differed from the notepad’s preliminary figures.

The Treasury did not immediately respond to requests for comment on the FT report and the Bessent notepad photo. The New York Fed and Morgan Stanley also did not immediately respond to requests for comment outside regular business hours, while Goldman Sachs declined to comment.

Yen Surges Following Intervention News

News of the potential intervention by the Treasury helped push the yen higher against the dollar on Friday from near 40-year lows earlier this week, with a notable jump during late afternoon trading. Data from LSEG showed that the dollar dropped from about 158.9 yen at around 4:14 p.m. EDT to about 157.6 yen just before 5 p.m. EDT, representing a decline of approximately 0.8%.

The currency movement reflects market sensitivity to coordinated intervention by major central banks and treasuries. While the percentage shift may appear modest, the rapid movement in such a heavily traded currency pair signals significant market impact from the joint US-Japan action. Currency traders closely watch for such interventions, which can reshape market dynamics and trigger substantial position adjustments.

The yen’s weakness has been a persistent concern for Japanese authorities, who have repeatedly warned about excessive volatility and its potential to disrupt economic stability. The currency’s decline against the dollar has accelerated in recent months, driven by the widening interest rate differential between the US Federal Reserve’s relatively high rates and the Bank of Japan’s ultra-loose monetary policy.

Japan’s Massive Solo Intervention Precedes US Action

Japan may have sold as much as $58.97 billion to buy yen on Thursday, central bank data indicated on Friday, signaling repeated efforts to stem the yen’s weakness. The massive scale of Japan’s unilateral intervention underscores the urgency with which Tokyo views the currency’s decline and the challenges it faces in reversing the trend without international support.

The coordinated action between Washington and Tokyo represents a significant escalation in currency market intervention, breaking from the typical pattern of individual nations acting alone to support their currencies. The joint effort suggests both countries view the yen’s weakness as a shared concern with potential implications for broader financial stability and trade relationships.

Currency interventions of this magnitude are relatively rare in modern financial markets, particularly among major developed economies. The G7 nations generally prefer to allow market forces to determine exchange rates, reserving intervention for exceptional circumstances when currency movements threaten economic stability or reflect disorderly market conditions rather than fundamental economic factors.

Historical Context and Future Implications

The 2011 intervention that preceded this week’s action came in the immediate aftermath of Japan’s devastating earthquake and tsunami, when the yen surged to record highs as Japanese companies repatriated funds for reconstruction efforts. That coordinated G7 response successfully stabilized the currency during a period of national crisis and demonstrated the effectiveness of multilateral action in currency markets.

The current situation differs substantially from 2011, with the yen weakening rather than strengthening and the intervention aimed at supporting rather than restraining the currency. The 40-year low represents a dramatic reversal from the yen’s traditionally strong position and raises questions about the sustainability of Japan’s economic model in an era of divergent monetary policies among major economies.

Looking ahead, market participants will closely monitor whether Friday’s intervention represents a one-time action or the beginning of sustained coordinated efforts to establish a new trading range for the yen. The Treasury’s advance notice to banks to “stand ready for future action” suggests authorities may be prepared to conduct additional interventions if the initial effort fails to produce lasting results in stabilizing the currency.

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The Bank of Japan raised its policy rate to 1% on Tuesday, reaching its highest level in over 30 years and marking a significant acceleration of policy normalization that began in 2024. This decision aligns with expectations of economists polled by Reuters and represents the BOJ’s first rate adjustment since December, when it increased rates to 0.75%. The central bank last raised rates to the 1% threshold in 1995, making this move a landmark moment in Japanese monetary policy history.

The BOJ board voted 7-1 in favor of the increase, with board member Toichiro Asada dissenting and advocating to hold rates at 0.75%. The overwhelming support among BOJ members indicates that the board prioritizes inflation concerns over growth considerations, according to Tai Hui, APAC chief market strategist at J.P. Morgan Asset Management. The decision marks another step in dismantling the remnants of the radical stimulus of Governor Kazuo Ueda’s predecessor as the BOJ transforms into a more conventional central bank that prioritizes fighting inflation.

Immediate market reactions showed measured optimism, with the benchmark Nikkei 225 climbing 0.46% following the announcement. The yen strengthened marginally to 160.22 against the dollar, while yields on 10-year Japanese Government Bonds climbed 3 basis points to reach 2.615%. These movements reflect investor confidence in the central bank’s measured approach to policy normalization.

Bond Purchase Taper Continues as Planned

The central bank confirmed it will maintain its existing tapering schedule, continuing to reduce government bond purchases by 200 billion yen per calendar quarter. The BOJ plans to halt the taper and maintain monthly JGB purchases at 2 trillion yen beginning in April 2027. This gradual approach demonstrates the central bank’s commitment to unwinding stimulus measures without disrupting market stability or derailing economic recovery.

The policy adjustment reflects mounting concerns about inflation dynamics in Japan’s economy, particularly as energy-related price pressures accelerate through business-to-business transactions. The BOJ acknowledged that Japan’s consumer inflation has remained below 2% partly due to government measures designed to reduce the household burden of higher energy prices. However, inflationary pressures persist beneath the surface and threaten to spread across consumer markets.

Energy Costs Drive Producer Price Surge

“However, the price pass-through stemming from the rise in crude oil prices has been progressing at a relatively fast pace in business-to-business transactions, which could spread to an increase in consumer prices across a wide range of items,” the central bank said.

This warning finds concrete evidence in Japan’s producer price index, which surged 6.3% in May, marking its fastest pace in over three years and mainly fueled by increased energy costs. The Iran war has contributed significantly to Japan’s inflation challenges by disrupting energy markets and creating supply uncertainties. Increasing expectations around the Strait of Hormuz reopening, which have lowered uncertainty over supply shocks to Japan, provided the BOJ with more confidence to restart its policy normalization, according to Hui.

Japan struggles with a weak yen and rising inflation, partly fueled by the Iran war and its impact on energy prices, creating conditions that support the policy tightening. Weakness in the Japanese yen had strengthened the case for raising rates, as currency depreciation threatens to import additional inflationary pressures through higher costs for imported goods and energy.

Global Market Implications and Dual Pressures

Global risk assets face dual macro pressures this week as the Bank of Japan’s rate increase coincides with the Federal Reserve’s FOMC meeting. Concerns over rising interest rates and tightening liquidity could trigger market volatility across asset classes. Historical precedents show that Bank of Japan rate hikes in 2000, 2006-2007, and July 2024 triggered global market turmoil, including the Nikkei 225’s single-day crash of 12.4% in August 2024 and the NASDAQ’s 3.4% decline.

The reversal of yen carry trades poses particular risks to global markets, especially high-growth stocks and crypto assets. Investors traditionally borrow in yen at low rates to invest in higher-yielding assets elsewhere, creating substantial cross-border positions. The rate hike potentially unwinds these trades as borrowing costs increase and yen strength reduces returns, forcing position liquidations that can amplify market volatility. Polymarket data indicated a 98.3% probability of a 25-basis-point rate hike ahead of the decision, showing market participants had largely priced in the move.

Fed Meeting Adds Complexity to Market Outlook

If the Fed adopts a hawkish stance this week by acknowledging inflation risks, raising its dot plot projections, or removing dovish language, short-term Treasury yields would rise and the U.S. dollar would strengthen. Combined with the BOJ rate hike, this scenario would intensify a global tightening effect with cascading implications for asset valuations. The U.S. May CPI rose to 4.2% year-over-year, while nonfarm payrolls added 172,000 jobs, suggesting resilient employment and rebounding inflation that weaken the case for rate cuts.

Polymarket data shows approximately 70.35% probability of no rate cut in 2026, reflecting shifting market expectations about U.S. monetary policy trajectory. The combination of Japanese rate increases and potential Fed hawkishness creates a double squeeze on liquidity conditions that historically correlates with elevated market stress. Traders must navigate these dual pressures while adjusting portfolios for a potentially extended period of tighter global financial conditions.

Crypto Markets Show Early Signs of Stress

The crypto market faces notable pressure as Bitcoin remains unstable near $65,000, having dropped to $61,500 following the CPI release. On-chain long liquidations have exceeded $1.5 billion, while spot Bitcoin ETFs recorded net outflows of $2.7 billion in a single week. High-beta assets including altcoins and meme coins appear particularly vulnerable to the tightening monetary backdrop as risk appetite diminishes and investors rotate toward safer assets.

Uncertainty amplifies due to Governor Kazuo Ueda’s absence from the meeting and press conference due to illness, with Deputy Governor Shinichi Uchida presiding instead. This unexpected change in communication style could contribute to market volatility as investors parse statements for policy signals. The coming weeks will test whether markets can absorb this historic policy shift without triggering broader disruptions across global financial systems.

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