Japan and the United States have confirmed a rare coordinated yen-buying intervention, with Japan's finance ministry stating they would not hesitate to take further action. This joint effort saw the yen surge more than 1% to 155.20 per dollar, a three-month high, moving away from a 40-year low of nearly 164 hit in July. By Monday, the yen was trading around 157 per dollar, indicating that while the intervention provided an immediate boost, the underlying factors driving its weakness remain.
Trading volumes in dollar/yen hit approximately $27 billion in the early Monday morning window, significantly higher than the recent average of $1.9 billion, according to analysts at Citi. This surge in volume suggests a strong market reaction to the intervention. Central bank data on Monday indicated Japan may have spent as much as $36.58 billion buying yen during Friday's joint intervention. The US Treasury also sold euros to buy yen, though the amount spent is not known, highlighting the coordinated nature of the intervention.
Despite these efforts, analysts remain skeptical about the long-term effectiveness of intervention without complementary monetary policy adjustments from the Bank of Japan (BOJ). The yen's weakness is largely attributed to the wide interest rate differential between Japan and the US, alongside factors like rising fuel costs. While the BOJ recently signaled a potential rate hike as early as September, many believe a fundamental shift in interest rates is needed for a sustainable reversal of the yen's weakening trend. Bank of America strategists noted that 155 yen could be a critical inflection point, as the currency found a floor around that level during previous interventions in April and May.
Analysts from MUFG and HSBC emphasize that while joint intervention can buy time and deter speculators in the near term, a lasting reversal requires a change in fundamentals, specifically faster BOJ rate hikes and a clearer stance from the government on the yen. Speculators have accumulated net short positions on the yen worth about $12.5 billion, indicating a prevalent belief that the yen will continue to weaken. The two-year Japanese government bond yield, sensitive to BOJ policy, hit 1.54%, its highest since May 1995, as markets anticipate an early rate hike.
