Japanese authorities spent a record 7.98 trillion yen, equivalent to $50.4 billion, on July 30 to arrest the national currency’s severe slide against the U.S. dollar, according to data released by the Finance Ministry.
The massive intervention marked the largest single-day currency support operation on record.
It surpassed the previous peak of 6.28 trillion yen set on April 30. Officials acted as the yen briefly touched the 163 range against the dollar, sliding to its weakest point in roughly 39 and a half years.
Japan and U.S. Launch Joint Currency Intervention
The July 30 action served as the opening move in a campaign that totaled 15.4 trillion yen between July 30 and August 3.
Following the initial unilateral defense, the Ministry of Finance and the Bank of Japan returned to the market on July 31 alongside U.S. authorities in a coordinated yen-buying operation.
That joint action marked the first time Japan and the U.S. intervened together to support the currency since 1998.
U.S. Treasury Secretary Scott Bessent and Finance Minister Satsuki Katayama stated that the intervention targeted disorderly currency movements, with authorities standing ready to act again if necessary.
Government data revealed a third round of spending worth 1.87 trillion yen on August 3.
South Korean officials also confirmed that the Bank of Korea synchronized its own won-buying interventions to amplify the impact of the currency-support measures.
The quarterly dataset released on Monday by the Ministry of Finance provided an exact daily breakdown of operations conducted during the July-September period.
Specifically, authorities spent 7.9756 trillion yen on July 30.
Authorities spent 5.5523 trillion yen on July 31.
Authorities spent 1.8714 trillion yen on August 3.
This brought the total reported for those dates to 15.3993 trillion yen.
This sequence of currency market interventions followed a previous round of spending that totaled 11.7349 trillion yen across April 30, May 4 and 6.
Financial data showed that Japan poured 15.3993 trillion yen into interventions between July 30 and August 26, establishing a new record for monthly spending.
Market participants noted that the initial unilateral defense on July 30 took place one day ahead of a Bank of Japan monetary policy decision.
This timing departed from prior practice, in which Japanese authorities typically entered the market following major economic data releases or monetary policy decisions.
Officials chose an unexpected moment to counter speculative trading.
The U.S. government coordinated with Tokyo partly out of concern that Japanese bond sales to fund yen purchases could impact the U.S. Treasury market.
Finance Minister Satsuki Katayama emphasized that authorities maintained their stance on responding to sharp exchange-rate movements and remained prepared to take bold action if required.
Economists Assess Future Currency Health
Tsuyoshi Ueno, a senior economist at the NLI Research Institute, noted that the enormous scale of intervention revealed deep government concern over the yen’s decline.
The enormous scale of intervention underscored the government’s sense of urgency to stem the yen’s decline.
Tsuyoshi Ueno, senior economist at NLI Research Institute
Ueno added that unresolved geopolitical tensions surrounding Iran acted as a key driver of yen weakness.
This left the currency vulnerable to continued downward pressure.
While the summer operations temporarily lifted the yen to 152.89 per dollar in early September, the currency later pared its gains and traded in the 158 range.
In the Tokyo foreign exchange market, real-demand yen buying by Japanese exporters provided support against downside risks.
Dollar selling by commercial participants also supported the yen.
Early trading saw downward pressure driven by expectations of additional U.S. rate hikes.
During morning trading, the dollar-yen pair reached 158.53 before selling pressure took over.
This selling pushed the rate back toward the upper line of the daily Ichimoku Cloud at 158.42.
The rate dropped as low as 158.15.
Concurrently, the Nikkei Stock Average was up 1,821.40 points from Friday at 59,256.17 at 10:53 a.m.
This increase represented a 3.17 percent gain.
Artificial intelligence- and semiconductor-related shares drove the market after it marked its third largest-ever point drop late last week.
Despite the equities rally, foreign exchange market reactions remained limited as unstable price action centered on the 158 range persisted.
Will unresolved geopolitical tensions surrounding Iran and expectations of additional U.S. rate hikes continue to drive yen weakness past the 158 range despite record government intervention?
Earlier coverage: Japan Spent Record $50.4 Billion in Single Day to Defend Yen
