US stocks tumble as war-driven inflation fears push Treasury yields to one-year highs

New York | EcoPulse24

Oil surge and prolonged Iran conflict pressure equities and strengthen higher-rate expectations

US equities fell sharply on Friday as investors grew increasingly concerned that prolonged conflict involving Iran and continued disruption across Gulf energy routes could intensify inflation pressures and force central banks to maintain restrictive monetary policy for longer.

The S&P 500 dropped 1.2%, while the Nasdaq Composite fell 1.5% and the Dow Jones Industrial Average lost 1.1%, with technology shares leading the decline as investors took profits following recent market gains.

Intel shares fell 5%, while Advanced Micro Devices declined 3% and Micron Technology dropped 4%. Nvidia lost 2%, and newly listed Cerebras Systems fell 4% after surging 68% in the previous session following its Nasdaq debut.

Microsoft outperformed the broader market, rising 4% after billionaire investor Bill Ackman disclosed that Pershing Square had built a position in the company.

Meanwhile, Boeing extended recent losses, falling another 3% after declining nearly 5% a day earlier. Investors reacted cautiously to US President Donald Trump’s announcement that China agreed to purchase 200 Boeing aircraft, a figure viewed as only modestly above prior market expectations.

At the same time, the yield on the US 10-year Treasury note jumped 10 basis points to 4.6%, reaching its highest level in a year as markets increasingly priced in the possibility of additional Federal Reserve tightening amid rising energy-driven inflation risks.

Oil prices continued climbing as diplomatic efforts to resolve the US-Iran conflict showed little progress and the Strait of Hormuz remained effectively closed, raising fears of prolonged disruption to global energy supply flows.

Recent US inflation reports, including both CPI and PPI data, reinforced concerns that rising energy costs are feeding directly into broader inflationary pressure across the economy.

Markets are now fully pricing in one Federal Reserve rate hike by March next year, with traders assigning more than a 50% probability that US interest rates could rise again before the end of 2026.

In Asia, Japan’s 10-year government bond yield climbed to around 2.7%, the highest level in nearly a decade, after producer inflation accelerated sharply to 4.9% in April from 2.9% in March, driven largely by rising energy costs.

Bank of Japan board member Kazuyuki Masu called for interest rates to be raised “as soon as possible,” warning that inflation risks linked to war and energy prices are becoming increasingly persistent.

Market Performance Snapshot

EcoPulse24 Analysis

Global markets are increasingly transitioning from a “war shock” phase into what can now be described as a geopolitical inflation regime - a far more dangerous environment for financial assets and monetary policy.

The key shift is that investors are no longer focused solely on the immediate disruption to oil supply. Markets are now repricing the possibility that elevated energy prices could keep inflation structurally higher for longer, delaying any meaningful return to lower interest-rate environments.

That dynamic explains why equities are falling at the same time bond yields are rising sharply - a classic signal that markets are adjusting toward tighter financial conditions and weaker risk appetite.

Technology stocks, which led the recent rally, have become especially vulnerable as higher bond yields pressure valuation models and reduce investor tolerance for speculative growth exposure.

The continued closure of the Strait of Hormuz is also becoming increasingly significant. Markets appear to be treating the disruption less as a temporary geopolitical headline and more as a genuine macroeconomic supply shock capable of influencing inflation, trade and energy pricing globally.

The rise in Japanese bond yields reinforces the broader global nature of the inflation wave. Economies that spent years battling low inflation are now beginning to face imported cost pressure tied directly to energy and geopolitical instability.

At a broader level, prolonged conflict and persistently high oil prices could force major central banks to postpone monetary easing cycles entirely, reshaping global investment conditions across equities, bonds, commodities and digital assets over the coming quarters.