Yen extends rally below 157.70 on BOJ hawks, soft Fed tone

The drop in USD/JPY below 157.70 reflects a genuine repricing of rate expectations rather than an intervention-driven move, according to analysts. BOJ board member Takata's call for flexible rather than fixed-rate hikes is seen as the main driver on the yen side. Meanwhile, the dollar is under its own pressure. Williams's comments this week, which characterized the Treasury yield rise as a sign of economic health and refrained from endorsing a September hike, were viewed as less hawkish than anticipated and are likely adding to the dollar weakness behind this break. Geopolitical factors also play a role: Trump's private discussions about ending the Iran war and a CNN report that the US military escorted 40 tankers carrying 18 million barrels through the Strait of Hormuz on Tuesday both suggest a possible reduction in the oil-driven risk premium. Lower oil prices would ease one of the yen's headwinds, as energy import costs have hurt Japan's terms of trade. Therefore, a genuine de-escalation could amplify yen gains, though for now this remains speculative. Friday's payrolls report is the more immediate swing factor.

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The yen is rising due to BOJ hawkishness, not intervention, and a weaker dollar combined with a declining oil risk premium may continue to drive USD/JPY lower ahead of Friday's payrolls.

In summary:

• USD/JPY declined below 157.70, continuing a steep decline that started overnight in Wednesday's US trading.
• Analysts attribute the yen's rally to a hawkish repricing of BOJ rate expectations rather than intervention, with one strategist noting few signs that USD/JPY could reach a new multi-decade high soon.
• The yen gains were widespread, with the currency also firming against the euro and pound.
• On Wednesday, BOJ board member Hajime Takata stated that the central bank should implement rate hikes flexibly to tackle rising inflation instead of following a fixed semiannual schedule. Citi called these comments the strongest signal yet from the board, reviving the prospect of a faster hiking path.
• Markets now almost fully price in a BOJ rate hike this month.
• New York Fed President John Williams's less hawkish remarks this week, which attributed the Treasury yield rise to a strong economy and avoided committing to a September hike, are likely adding to broader dollar weakness that is driving the move.
• Markets see a 61% probability of a Fed rate hike in September. Friday's US non-farm payrolls report, expected to show a gain of 56,000 jobs after July's unexpected drop of 23,000, is viewed as the main event that could shift expectations.
• Separately, Trump is reportedly discussing ending the Iran war, and CNN reported that the US military escorted 40 commercial vessels with around 18 million barrels of oil through the Strait of Hormuz on Tuesday, a wartime record. Both events point to a potential easing of oil prices if the de-escalation persists.
• Since the unusual joint US-Japan intervention to buy yen on July 31, the currency has had difficulty holding gains due to wide interest rate gaps, fiscal worries, and high energy prices.

The yen continued to rise on Thursday, driving USD/JPY below 157.70, extending a sharp decline that started overnight in Wednesday's US trading. Traders and analysts did not link the move to intervention by Japanese authorities, but rather to a genuine hawkish repricing of domestic rate expectations.

The yen's gains were broad, also rising against the euro and sterling. One strategist said the Japanese government has little reason to intervene now, with few signs that USD/JPY will hit a new multi-decade high soon. The trigger was Wednesday's comments by BOJ board member Hajime Takata, who said the central bank should raise rates nimbly to counter rising inflation instead of sticking to the expected fixed semiannual schedule. Citi described these as the board's strongest message yet, noting that markets are taking Takata's comments "more seriously" and that they revive the possibility of a faster hike path. A BOJ rate increase this month is now nearly fully priced in.

The decline in USD/JPY is not solely due to yen strength. New York Fed President John Williams's comments earlier this week, which portrayed the Treasury yield surge as a result of a strong economy rather than dysfunction and did not commit to a September hike, were seen as less hawkish than some expected and are likely contributing to the broader dollar weakness behind the move. The dollar side of the equation will be tested on Friday with the US non-farm payrolls report. Economists forecast an increase of 56,000 jobs, after July's surprising drop of 23,000, and the unemployment rate is expected to hold steady at 4.1%. Markets priced in a 61% chance of a Fed rate increase this month. Analysts say a much weaker payrolls number would be needed to significantly alter that expectation, especially after Fed Chair Kevin Warsh's hawkish remarks at Jackson Hole. Some note that supply factors like lower immigration and more retirements could continue to produce strong job numbers, supporting hike expectations.

A more speculative factor behind the yen's strength is the changing situation in the US-Iran conflict, which has raised energy costs and import prices for Japan throughout the war. Trump is privately discussing with senior aides whether to declare the six-month-old war over, reportedly favoring the idea, as he believes continued economic pressure will eventually force Iran to dismantle its nuclear program or collapse. Separately, CNN reported that the US military escorted 40 commercial vessels carrying around 18 million barrels of oil through the Strait of Hormuz on Tuesday, a wartime high near pre-war levels, while intercepting a cruise missile and repelling several drone attacks. If either the political rhetoric or the improving flow data leads to sustained de-escalation, it would likely reduce the geopolitical risk premium in oil prices, removing a cost pressure that has hurt Japan's terms of trade and potentially reinforcing the yen's gains. For now, however, both developments remain unresolved, with Iran showing no signs of backing down and the US military maintaining an extended, open-ended presence in the region.

Since the unusual joint US-Japan intervention to support the yen on July 31, the currency has generally found it difficult to hold gains, pressured by wide interest rate differentials with the US, fiscal worries in Japan, and the renewed rise in energy prices linked to the conflict. Thursday's move indicates that this dynamic may be changing, at least temporarily, as the BOJ hawkish repricing and softer dollar sentiment together provide the yen with its strongest support in weeks.