Yen surges from 158 as Japan signals 2nd intervention

The Japanese yen surged on May 6 after a sharp plunge in the dollar from above the 158 level triggered speculation of a second currency intervention by the Ministry of Finance (MOF) in less than a week, a move that comes as soaring oil prices complicate global currency markets.

"We should have seen it coming, really. USD/JPY was trading above 160 heading into the start of a series of global May Day holidays, and just like it did in 2024, it very much looks like Japan has intervened again," analysts at ING said in a note.

The suspected action follows a dramatic surge in the yen on May 1, when Bank of Japan data suggests authorities spent as much as 5.48 trillion yen ($35 billion) to defend the currency after it breached the 160-per-dollar level. While the yen saw a brief relief rally, it had steadily weakened in recent days as geopolitical tensions in the Middle East pushed oil prices above $110 a barrel, strengthening the safe-haven US dollar. The 10-year Treasury yield climbed to 4.46% as investors priced in inflationary risks from sustained high energy costs.

The repeated interventions underscore a deepening struggle for Japanese authorities as they battle broad dollar strength, fueled by wide interest rate differentials and now a significant "war premium" in energy prices. While the MOF has secured a temporary floor, analysts question if it can reverse the trend without a shift in underlying fundamentals, with the market's focus remaining on the closely-watched 160 level.

Geopolitical Tensions Fuel Dollar Demand

The intervention comes during a period of fragile market sentiment, with a reported missile strike by Iran on a US warship in the Strait of Hormuz sending Brent crude spiking over 5 percent to as high as $114 per barrel. While the US denied the attack, the incident highlighted the risk of a prolonged blockade in a waterway that handles 20 percent of global oil trade.

This flight to safety has bolstered the US dollar, putting direct pressure on currencies of energy-importing nations like Japan. The dollar index rose 0.25 percent in response to the attack reports. The dynamic places the MOF in a direct tug-of-war with powerful macroeconomic and geopolitical currents that favor a weaker yen. "The RBI is also finding it a little difficult to keep up with the market at this point,” said Michael Wan, a senior economist with MUFG, commenting on the general pressure central banks are facing.

Intervention's Long-Term Efficacy Questioned

Despite the aggressive action, which Vice Minister of Finance Atsushi Mimura labeled a "final evacuation warning to markets," analysts remain skeptical about the long-term impact. The fundamental gap between near-zero interest rates in Japan and higher rates in the US continues to exert downward pressure on the yen.

"We suspect intervention will merely act as a lid on USD/JPY, not a catalyst for protracted yen strength," said Abbas Keshvani, Asia Macro Strategist at RBC Capital Markets. This view was echoed by ING, which noted that a similar intervention in 2024 only bought Tokyo some time before the USD/JPY pair hit a new high two months later. Market participants believe other measures may be considered, including the reintroduction of foreign currency non-resident (FCNR) deposits to attract inflows, a tool first used successfully during the 2013 taper tantrum.

This article is for informational purposes only and does not constitute investment advice.