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Japan's $73B Yen Intervention Fails to Halt Slide
Japan spent $73.5B on yen-buying intervention last month. The yen remains near triggering levels as yield gap and carry trade persistence explain limited impact. Next catalyst: BoJ meeting.
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Japan's Ministry of Finance reported on Friday that it spent 11.7 trillion yen ($73.5 billion) on yen-buying intervention between April 26 and May 29. That total exceeds the previous record of 9.2 trillion yen from October 2022. The effect has been limited. The yen trades near the same levels that first triggered Tokyo's entry.
Japan's Record Intervention: What the Official Data Confirms
The official figure covers multiple rounds of suspected action. Traders had already priced in the likelihood after sharp moves on April 29 and May 1-2. What the data confirms is the full cost of those operations. The intervention bought yen when the currency had fallen to a 34-year low against the dollar. By May 29, the pair had settled roughly three figures above the zone where the Ministry of Finance previously acted in October 2022.
That price action reveals the core problem. The intervention was large enough to slow the slide. It was not large enough to reverse the rate differential that drives it. The US-Japan 10-year yield gap remains near 340 basis points, down only moderately from the 400-basis-point peak in October 2023. As long as that gap persists, carry traders have a structural reason to sell yen against dollars on every dip.
Why the Simple Read Falls Short
The naive interpretation is straightforward: Japan spent a record amount to buy yen, so the currency should strengthen. That view ignores scale. Daily turnover in USD/JPY is roughly $500 billion to $600 billion across all venues. A single day's intervention of roughly $5 billion to $7 billion is a fraction of one day's natural flow. It can trigger a short-term squeeze. The effect fades quickly.
The better read focuses on positioning. The latest Commodity Futures Trading Commission data shows yen shorts among leveraged funds near multi-year extremes. Each intervention round forces some of those shorts to cover. New sellers step in once the price stabilises. The pattern is self-reinforcing until the fundamental driver – the yield gap – changes direction.