U.S. Stock Futures Flat Amid Iran Tensions and Fed Rate Hike Jitters

U.S. stock index futures were little changed in evening trading as investors assessed heightened geopolitical risks in the Middle East and persistent concerns over the Federal Reserve's monetary policy path. The muted activity follows a negative session on Wall Street, setting a cautious tone for a month that is historically challenging for equities.

By 7:41 PM ET (23:41 GMT), S&P 500 Futures, Nasdaq 100 Futures, and Dow Jones Futures were all trading near the flatline, according to Investing.com data.

Geopolitical Tensions Fuel Oil Surge

Market sentiment soured after the U.S. launched additional military strikes against Iran's Islamic Revolutionary Guard Corp, marking the second such action this week. The conflict centers on the strategic Strait of Hormuz, a critical waterway for global energy supplies.

U.S. President Donald Trump warned of "harder" strikes if Iran retaliated, escalating tensions in the region. The renewed military action caused oil prices to soar, stoking investor fears about the potential for energy-driven inflation to impact the U.S. economy.

Rate Hike Probabilities Climb

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Investors are also contending with a sell-off in the U.S. Treasury market, which has pushed bond yields to multi-year highs. This move reflects growing conviction that the Federal Reserve will implement another interest rate increase at its September meeting.

• The probability of a 25-basis-point hike in September has jumped to 67.9%, up sharply from 34.7% just a week ago, according to the CME FedWatch tool.
• These expectations were solidified after Fed Chair Kevin Warsh recently reiterated the central bank's commitment to its 2% annual inflation target.

Market participants are now keenly focused on upcoming labor market data, particularly Friday's nonfarm payrolls report, for further clues on the economy's strength. Signs of a resilient job market could give the Fed more headroom to continue tightening policy.

Wall Street Pauses After Tuesday Sell-Off

The cautious futures trading followed a broad decline in the previous session. On Tuesday, the S&P 500 fell 0.7%, the Nasdaq Composite lost 1%, and the Dow Jones Industrial Average shed 0.8%. Even stronger-than-expected manufacturing PMI data for August failed to lift investor spirits.