S&P 500 Futures TodayS&P 500 futures also traded higher before the U.S. market opened. The benchmark S&P 500 had ended Tuesday down 0.32% at 7,728.20, with weakness in major technology companies weighing on the index. The index remains sensitive to movements in oil prices, inflation expectations and Treasury yields. Oil Prices Today: Brent Crude Near $89Oil prices remained elevated as investors assessed risks to energy supplies from the Middle East. At the same time, the S&P 500 energy sector gained 1.1% as oil prices remained elevated.