U.S. Markets Retreat as Iran-U.S. Ceasefire Teeters on Brink of Collapse

U.S. equity markets retreated on Monday, driven by heightened geopolitical instability as the window for a ceasefire between Washington and Tehran narrows. The Dow Jones Industrial Average, S&P 500, and Nasdaq Composite all ended the session in negative territory, reflecting a broad risk-off sentiment among investors. The downturn follows reports that Iran has declined to participate in talks with Washington-backed insurgents in Pakistan. Tensions escalated further after President Donald Trump announced that U.S. forces had seized an Iranian-flagged vessel in the Gulf of Oman. The administration noted the ship was already on a U.S. Treasury blacklist for past misconduct and is currently examining its cargo. Market data showed the Dow Jones Industrial Average falling 0.01% to 49,442.56, while the Nasdaq Composite dropped 0.3% to 24,404.39. The S&P 500 declined 0.2% to close at 7,109.14. Market anxiety was evidenced by the CBOE Volatility Index (VIX), which surged 7.95% to reach 18.87. Sector performance was fragmented. The Communication Services Select Sector SPDR (XLC) led the decline, falling 1.4%, followed by Health Care (XLV) and Utilities (XLU), both down 0.9%. Conversely, the Materials Select Sector SPDR (XLB) rose 0.6%. Within the Dow, 3M Company (MMM) was a primary laggard, with its share price sliding 2%. The market remains on high alert as President Trump issued a stern warning that Iranian infrastructure, specifically power plants and bridges, could be targeted if a diplomatic agreement is not reached before the current ceasefire expires this week.