US stock market crashes hard today: Dow falls big, S&P 500 logs fourth straight losing day, Nasdaq also in deep red

US stock market crash: US stocks fell sharply on Tuesday. The Dow dropped 545 points to 46,044.77. The Nasdaq slipped 0.5%. The S&P 500 fell 0.3%. Bitcoin briefly broke below $90,000 and erased all 2025 gains. Japan markets logged their worst loss since April. Treasury yields moved lower. Nvidias earnings on Wednesday are a key test for the AI trade. Big Tech debt levels raised new concerns. The September jobs report arrives Thursday. Rate-cut odds stand near 46%. ADP showed private job losses slowing to 2,500 per week. Home Depot cut its profit outlook.