All three main Wall Street indexes closed lower Monday; Nasdaq fell 1.5% under chip-stock pressure

US stocks closed lower on Monday, July 13, 2026, with all three main indexes finishing in the red. The Nasdaq Composite fell 1.55% to 25,873, the S&P 500 lost 0.79% to 7,515, and the Dow Jones Industrial Average dropped 138 points (0.26%) to 52,498. The declines followed the US administration's move to reinstate a blockade on Iranian shipping through the Strait of Hormuz, which sent US crude prices up about 8.5% and revived fears of inflationary pressure and a delayed rate cut.

The heaviest pressure fell on semiconductors: SK Hynix shares dropped about 8%, Micron about 5%, AMD about 4%, and Intel about 7%. The intensifying US-Iran military standoff and rising energy prices have sharpened risk-off sentiment across global markets, feeding through to gold and to Iran's asset markets via the oil price and interest-rate expectations.