U.S. equities traded under modest pressure at midday Monday, April 20, 2026, with the S&P 500 down 0.36% to 7,100.57 and the Nasdaq shedding 0.54% to 24,337.16 after President Trump disclosed that the U.S. Navy had disabled an Iranian vessel. The VIX jumped 9.55% to 19.15, reflec