S&P 500 Slumps as AI Enthusiasm Cools and Fed Rate Hike Odds Rise

Key Facts

Reflecting a shift in investor risk appetite, the S&P 500 retreated 1.5% from its previous week's close to end at 7,457.69. This decline was driven by cooling enthusiasm for AI stocks as lower-cost competition emerges, alongside shifting interest rate expectations. According to the CME Group's FedWatch Tool, markets are now pricing in a greater than 50% probability of a quarter-point rate hike during the September 16 Federal Reserve meeting.

This retreat comes as mega-cap tech companies face pressure to justify massive capital expenditures; Goldman Sachs analysts recently noted that the ROI on AI infrastructure may take longer to materialize than previously anticipated (per research reports). In a broader context, this correction follows a period of record highs led by semiconductor giants, with market data indicating that the tech-heavy Nasdaq often leads the S&P 500 in sector-specific pullbacks.

Traders are closely monitoring upcoming central bank signals, especially following the July 14, 2026, inflation data which showed the Core CPI holding at 2.6% annually, a factor that could solidify the Fed's hawkish stance for the remainder of the quarter.