March 4 - U.S. stock futures opened lower on Wednesday as traders digested a spike in regional hostilities and higher crude prices that have heightened concerns about inflation and central bank policy. Brent crude rose nearly 2%, although futures eased from intraday highs after U.S. President Donald Trump announced an insurance guarantee for Gulf shipping and said the U.S. Navy could escort oil tankers through the Strait of Hormuz.
The Strait of Hormuz - a narrow, strategically important waterway between the Persian Gulf and the Gulf of Oman - handles roughly a fifth of global oil and liquefied natural gas shipments, underscoring why disruptions there ripple through energy markets.
On the ground, the conflict remained active. U.S. and Israeli forces have conducted strikes on Iran since Saturday, while Iranian drones and missiles have hit Gulf oil refineries and struck at U.S. embassies in Saudi Arabia and Kuwait. The escalation has sent oil prices sharply higher, with crude up more than 13% so far this week, raising questions about the inflation outlook.
Investors moved toward perceived safe-haven assets as geopolitical risk mounted. Gold rose 1%, the dollar hovered close to a three-month high, and the yield on the U.S. 10-year Treasury note climbed for a third straight session.
Market action in futures tracked the risk-off tone. At 02:26 a.m. ET, Dow E-minis were down 144 points, or 0.3%, with 17,957 contracts traded. Nasdaq 100 E-minis fell 156.75 points, or 0.63%.
Wider U.S. equity performance had already shown strain the previous day. The S&P 500 slipped 0.9% on Tuesday, breaking below its 100-day moving average for the first time since November 20. The Dow lost 0.8% and the Nasdaq dropped 1%.
For policymakers and market participants, the key question is what a fifth day of conflict could mean for inflation and for Fed policy. Higher oil costs present a direct route for inflation to re-accelerate, potentially complicating efforts to bring prices down. That dynamic has reinforced market expectations that the Federal Reserve will hold short-term interest rates steady for the time being.
Investors were also awaiting several economic releases that could offer additional guidance on the interest rate path. The Fed's Beige Book - its district-by-district summary of economic conditions - was scheduled for later in the day, together with ADP employment data and the final reading of S&P's composite purchasing managers index.
Bottom line: Geopolitical escalation in the Middle East and a sharp rise in oil prices pressured U.S. futures and pushed investors into safe-haven assets, while upcoming economic data and central bank signals will be watched for implications on the interest rate outlook.