Key Takeaways: The coordinated US-Japan intervention that pulled the yen off its four-decade low has failed to reverse the pair's trend, with USD/JPY back near ¥158.
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Coordinated Yen Defense Spends $34B as USD/JPY Holds Near ¥158
The coordinated US-Japan intervention that lifted the yen from a four-decade low near ¥164 has lost momentum, with USD/JPY back at ¥157.79 after Tokyo spent $34 billion defending the currency in a single session.
"Interventions in the currency markets have a limited impact in the medium term," said Axel Merk, chief investment officer at Merk Investments. "It's about posturing to tell the market not to short the yen so much."
The yen slipped 0.38 percent to 157.79 per dollar on Tuesday, paring gains after touching a three-month high of 155.20 the previous session. The dollar index eased 0.13 percent to 99.88, the euro rose 0.20 percent to $1.1531, and sterling gained 0.13 percent to $1.3451. The joint action marked the first coordinated yen purchase between Tokyo and Washington since 1998.
The durability of the yen defense hinges on whether the Bank of Japan follows through with a rate hike in September — markets are watching after six straight months of rising real wages — and whether the Fed's next move supports a weaker dollar. BNP Paribas analysts led by Ishan Gurnani said they still expect the pair to end the year higher than current levels.
Treasury Secretary Scott Bessent said Sunday he would not hesitate to repeat the coordinated action and urged that the Federal Reserve's Foreign and International Monetary Authorities lending facility be "upsized." The FIMA Repo Facility, created during the COVID-19 pandemic, allows countries holding Treasury securities at the New York Fed to borrow up to $60 billion in dollar loans for up to seven days. Japan held $1.14 trillion of Treasuries as of the end of May, the most of any foreign nation, and tapping the facility allowed Tokyo to fund yen purchases without selling its bond holdings outright.
The last time Washington joined Tokyo in buying yen was 1998, when the pair traded above ¥147 and the intervention preceded a sustained yen recovery over the following months. This time, the scale is larger — Japan reportedly spent around $59 billion on recent interventions, according to Bank of Japan data — but the underlying rate differential remains wide. The Fed held rates steady last week with three policymakers dissenting in favor of a hike, while the Bank of Japan is weighing its first move since March as six consecutive months of rising real wages strengthen the case for tightening.
Rate Differentials Keep the Pair Bid
From a technical standpoint, USD/JPY collapsed from 163.76 to a low near 155.21 after the intervention before staging a steady recovery. Price is now testing the 0.382 Fibonacci retracement near 158.48, supported by an ascending trendline off the intervention low, with the RSI showing a bullish divergence. A decisive break above the 0.382 level would open the path toward 159.49 and then 160.50, while a break below the trendline would expose a retest of the 155.21-156.00 zone.
The Bank of Japan's September meeting is the next test for the yen. If Tokyo delivers a hike, the currency could sustain its gains and force further unwinding of carry trades that have weighed on risk assets globally. If the BoJ holds, the intervention's effect may prove temporary, with BNP Paribas analysts led by Ishan Gurnani noting they are "not yet convinced" the pair will end the year lower. The Fed's mid-September meeting follows, where the three dissents from last week's hold suggest the policy path remains contested.
Rebounding oil prices after renewed tensions in the Strait of Hormuz add another layer of complexity, pushing import costs higher for Japan and complicating the BoJ's inflation calculus. The dollar's broader weakness — the index has fallen from recent highs as the Fed's hold and the yen intervention weigh — could provide some support for risk assets, though the carry trade unwind remains the dominant risk factor for global markets. Yen short positioning remains elevated, and TS Lombard analysts led by Daniel Von Ahlen warned in an investor note that such positions are "particularly risky" given the threat of further intervention by both monetary authorities.
This article is for informational purposes only and does not constitute investment advice.
