USD/JPY Breaks Below 155 as Oil Climbs on Hormuz Tensions

The yen surged past a key level while crude extended gains as traders reacted to renewed Middle East tension and a U.S. market holiday. European equities were cautious ahead of the ECB decision and fresh inflation data.

USD/JPY broke below 155 for the first time since February on September 7, 2026, marking one of the session’s clearest moves as the Japanese yen strengthened sharply against the U.S. dollar. The pair fell as low as 154.05 and was last trading near 154.65, down about 1% on the day.

At the same time, WTI crude rose to $92.30 and Brent pushed to roughly $97.50 as renewed U.S.-Iran strikes near the Strait of Hormuz kept supply risks in focus. With U.S. cash equity and bond markets closed for Labor Day, thinner trading conditions likely amplified market swings.

European investors also had to digest softer German factory output, firmer eurozone growth data, and rising expectations for tighter monetary policy after a hot U.S. payrolls report. The result was a defensive tone across risk assets, with oil higher, gold lower, and major regional stock indexes struggling for direction.

Key Facts

  • USD/JPY fell 1% to 154.65 after touching 154.05, its lowest level since February 2026.
  • WTI crude gained 0.9% to $92.30, while Brent crude rose more than 1% to about $97.50.
  • Gold declined 0.8% to $4,390 as higher rate expectations weighed on precious metals.
  • Germany’s DAX slipped 0.4%, while France’s CAC 40 was little changed in European trading.
  • Eurozone second-quarter GDP growth was revised up to 0.6%, while German factory output weakened in July.

USD/JPY Breaks Below 155

The break below 155 in USD/JPY was the session’s most closely watched technical event. The level had held for months as a psychological line for traders gauging both yen weakness and the risk of sharper official responses from Japanese authorities. Once the pair moved beneath that threshold, selling accelerated quickly, suggesting stops were triggered and liquidity was thin enough to exaggerate the move.

The yen’s rally matters beyond foreign exchange markets. A stronger yen can alter the earnings outlook for Japan’s exporters, affect global carry trades, and shift sentiment across broader risk assets. Investors also watch the move as a signal of whether markets are beginning to reassess the durability of dollar strength, especially after a period dominated by elevated U.S. yields and resilient U.S. economic data.

The backdrop was unusual. U.S. stock and bond markets were shut for Labor Day, leaving fewer participants active during global trading hours. That does not create a trend by itself, but it can intensify volatility when markets are already reacting to geopolitical stress, central bank expectations, and key technical levels. In this case, USD/JPY, oil, and gold all reflected a market leaning toward caution rather than conviction in risk-taking.

Breaking below 155 turned a slow yen recovery into a market-wide signal that positioning had become vulnerable.

Why oil and gold moved in opposite directions

Crude prices advanced as traders priced in the risk that military exchanges near the Strait of Hormuz could threaten shipping flows or insurance costs, even without a confirmed major disruption to supply. The added report of another attack on a Saudi Aramco facility reinforced the sense that energy infrastructure remains exposed. With WTI above $92 and Brent approaching $100, the market is increasingly testing how much geopolitical premium refiners and consumers will have to absorb.

Gold, however, moved lower despite the geopolitical backdrop. The decline to $4,390 suggests interest-rate expectations were the more powerful force during the session. After strong U.S. labor data, investors are bracing for the next inflation print and reassessing the odds of further policy tightening. In that environment, higher real yields can pressure non-yielding assets such as gold, even when headline risks would normally support safe-haven demand.

Implications for Investors

For investors, the combination of a stronger yen, firmer oil, and softer gold points to a market being pulled in different directions by macro and geopolitical forces. Currency-sensitive portfolios should pay close attention to whether USD/JPY can hold below 155 on a closing basis. If the break sticks, the move could ripple into Japanese equities, global volatility strategies, and positioning tied to carry trades funded in yen.

Energy exposure is also becoming more consequential. Crude near $92 for WTI and around $97.50 for Brent raises the stakes for transport, chemicals, airlines, and other fuel-intensive industries. It also complicates the inflation outlook just as central banks are trying to judge whether price pressures are cooling enough to avoid additional tightening. If oil pushes decisively toward $100, equity markets may have to reprice margins, inflation expectations, and the rate path together.

European assets face a particularly crowded set of watch points. Investors must weigh stronger eurozone GDP against weak German industrial data, while also preparing for the European Central Bank policy decision later in the week. The policy tone from Frankfurt could influence bond yields, the euro, and cyclical sectors at a moment when growth signals across the region remain mixed. A hawkish ECB into higher oil prices would likely keep pressure on rate-sensitive stocks and reinforce caution toward economically exposed sectors.

The next catalysts are clear: confirmation of whether USD/JPY sustains its break below 155, any escalation around Hormuz, the ECB decision, and the upcoming U.S. CPI report. If those events reinforce the current pattern, investors should expect continued volatility across currencies, commodities, and global equities.

Ultima Markets