U.S. equities closed at record highs on April 16, 2026, with the S&P 500 advancing 0.26% to 7,041.28 and the Nasdaq Composite gaining 0.36% to 24,102.70 for its 12th straight day of gains. Iran ceasefire optimism and a blowout TSMC quarter — Q1 net profit up 58% to NT$572.48 bill