U.S. stock futures were little changed Monday evening after Wall Street finished mixed, with technology shares under pressure and investors weighing new U.S. measures against Iran. At about 20:50 ET, S&P 500 futures were flat at 7,669.25 points, Nasdaq 100 futures fell 0.1% to 29,089.75 and Dow Jones futures were unchanged at 53,479.0. Earlier losses reflected weakness in chip stocks and caution before Nvidia's second-quarter fiscal 2027 results, due after Wednesday's closing bell. Nvidia fell 2.9% in regular trading, while Micron Technology and Broadcom also declined. The Dow gained 0.3%, but the S&P 500 lost 0.3% and the Nasdaq fell 0.8%. Treasury Secretary Scott Bessent warned that countries doing business with Tehran could face secondary sanctions, while the administration described its latest pressure campaign as an "economic D-Day" against Iran. Brent crude traded below $92 a barrel after oil prices dropped sharply Monday, easing pressure on bond markets. The 10-year Treasury yield fell about 3 basis points to around 4.70%, and the 30-year yield eased to roughly 5.23%, after both reached multi-year highs last week. Investors will also focus on July personal consumption expenditures inflation data and the Jackson Hole symposium, where Fed Chair Kevin Warsh is scheduled to speak Friday. Nvidia's outlook, inflation data, Federal Reserve signals and geopolitical risks may determine whether the recent equity rally regains momentum.