Yen Holds Most Gains After First Japan-US Joint Intervention Since 1998 — 157 Level in Focus

VG Markets · 2026-08-05T07:06:11Z
Yen Holds Most Gains After First Japan-US Joint Intervention Since 1998 — 157 Level in Focus

The yen slipped 0.25% to 157.56 per dollar on Tuesday, retaining most of last week's gains after a rare joint currency intervention. The currency had rallied roughly 5% over three sessions, touching a three-month high of 155.20 — a sharp recovery from July's 40-year low of 163.99.

Key details traders should note:

  1. Historical significance: This marks the first coordinated Japan-US yen intervention since 1998; the two countries last acted together under the 2011 G7 framework following Japan's earthquake
  2. Estimated cost: Bank of Japan data suggests Friday's operation may have cost as much as $36.58 billion
  3. New policy tool: Japan's Ministry of Finance said it will tap the Fed's FIMA repo facility going forward, allowing dollar liquidity via Treasury swaps rather than outright bond sales — reducing pressure on US yields
  4. Official stance: US Treasury Secretary Scott Bessent confirmed the action "countered disorderly yen movements" and said Washington "will not hesitate to participate in further joint intervention"

Axel Merk, CIO at Merk Investments, noted intervention typically has limited medium-term impact, functioning more as a signal against aggressive short-yen positioning.

For traders: the 157.00–158.00 zone is the near-term battleground. A break below 157 raises the odds of renewed joint action. Against the euro, the yen eased 0.33% to 181.36, pulling back from Monday's near nine-month high. Watch for any Bank of Japan rate signals next — that will likely determine whether this rebound extends or fades.