Markets wrap for Monday, August 17, 2026.

S&P 500 (^GSPC): closed at 7,745.06, down 40.70 points (-0.52%). Nasdaq Composite (^IXIC): closed at 26,644.91, down 84.25 points (-0.32%). Dow Jones (^DJI): closed at 53,459.78, down 272.63 points (-0.51%).

Top stories included S&P 500 falls as oil prices rise amid Iran tensions: Live updates - cnbc.com (cnbc.com) Stock Market Today: Dow Slips; 30-Year Treasury Poised to Hit High — Live Updates - WSJ (WSJ) Stock market today: Dow, S&P 500, Nasdaq fall as oil rises amid US-Iran tensions, 30-year yield hits highest level in decades - Yahoo Finance (Yahoo Finance).