AI Stock Frenzy: Nvidia’s $100B OpenAI Bet and Major Tech AI Moves Send Shares Surging (Sept 24–25, 2025)
Market Snapshot (Sep 24–25, 2025) US and global indices treaded water after the blistering tech rally. On Sept. 24 the S&P 500 and Nasdaq slipped about 0.3–0.5% investopedia.com, as profit-taking hit “Magnificent 7” stocks and AI names. A key factor was Fed Chair Powell’s commentary on Sept. 23, warning that tech valuations were high. Post Powell, the S&P tech sector dipped (-0.5%) and Nasdaq futures fell modestly investopedia.com. Tech giants cooled: Oracle and Nvidia fell 1.7% and 0.8% investopedia.com; Amazon slid 0.2% (third day down) investopedia.com. Energy stocks bucked the trend (energy +1.3%) amid rising oil. But AI–focused stocks bucked that