Global Markets React to S&P 500 Losses and Geopolitical Tensions

U.S. stock futures remained steady after the S&P 500 experienced its third consecutive day of losses, with futures for the S&P 500 and Nasdaq 100 edging up slightly. United Airlines saw a 5% increase in after-hours trading following a better-than-expected performance, while J.B. Hunt Transport Services fell 6% after missing analyst expectations. Federal Reserve Chair Jerome Powell's comments on inflation failed to alleviate market concerns, leading to a potential range-bound trading pattern for equities. Interactive Brokers' Thomas Peterffy warned of a market slowdown as margin loans hit an all-time high, while stock futures opened higher in extended trading.