Stock Market Today (Sept.
14, 2026): Nasdaq, S&P 500 fall on rising oil prices and AI concerns The stock market's early September downturn has continued into Monday, with investors anxious about rising oil prices and growing worries over the development of advanced artificial intelligence.
The usual suspects – surging Brent crude prices, hawkish central bank expectations, and a looming Federal Reserve meeting – are all contributing to this week's market drama.