The S&P 500 plunged 2.1% to 6,794 in a 'tariff tantrum' session triggered by President Trump’s threat of 10-25% levies on European allies over the Greenland dispute. The Dow shed 870 points while the Nasdaq tumbled 2.4%, led by a 5.5% slide in Broadcom and a 4.5% drop in NVIDIA amid supply chain friction. Simultaneously, the 10-year Treasury yield jumped 7 basis points to 4.29% and the VIX reclaimed the 20 handle, signaling a violent de-grossing by institutional players. The critical signal is the decoupling of precious metals from real rates; Gold surged to a record $4,760/oz while yields rose, suggesting markets are hedging against geopolitical policy error and currency debasement rather than a standard cyclical slowdown. Watch the European open at 3:00 AM ET for retaliatory rhetoric; a unified EU response could test key S&P support at 6,750, while Netflix earnings post-close will serve as a pulse check for consumer resilience amidst the macro gloom.