Stock Market Today: Dow Loses 400 Points Amid U.S.-Iran Battle; Palantir Climbs As Nvidia Slips (Live Coverage)

Market Overview - The Dow Jones Industrial Average closed down over 400 points after initially losing nearly 1,200 points, influenced by the U.S.-Iran conflict [1] - The S&P 500 and Nasdaq also experienced losses, with the S&P 500 down 0.9% and the Nasdaq down 1% [1] - Small-cap stocks, represented by the Russell 2000, fell 1.8% after a larger drop earlier in the session [1] Stock Performances - Palantir Technologies (PLTR) gained 1.4%, marking a five-day winning streak, while Nvidia (NVDA) fell 1.3% [1] - Ouster (OUST) surged 7.3% after exceeding fourth-quarter profit and revenue expectations [1] - Target (TGT) rose over 7% after beating fiscal fourth-quarter earnings estimates and providing a positive revenue forecast for fiscal 2026 [1] - Kontoor Brands (KTB) jumped more than 21% following mixed fourth-quarter results but a favorable earnings outlook [1] Sector Movements - Oil prices increased by more than 3%, trading close to $73.55 per barrel, with the U.S. dollar rising 0.7% as investors sought safe-haven assets [1] - Cruise line stocks fell sharply, with Norwegian Cruise Line (NCLH) down 6.5% after missing sales forecasts and providing disappointing earnings guidance [2] - Biotech stocks faced significant declines, with Harrow (HROW) plummeting nearly 25% after missing earnings expectations [1][2] Earnings Reports - MongoDB shares dropped over 26% due to a disappointing outlook for the fiscal first quarter, despite better-than-expected fiscal third-quarter earnings [2] - AutoZone (AZO) shares fell more than 6%, while Best Buy (BBY) stock increased nearly 11% following their earnings reports [2]