S&P 500's Rapid Rise Raises Concerns of Overheating Amid Historical Precedents
The S&P 500 has risen over 16% in April and May, a pace seen only four times since WWII. Three prior instances followed major economic shocks; the last similar rise outside recession occurred before the 1987 crash. Investors are concerned about rapid gains driven by AI enthusiasm despite lingering risks like potential Fed rate hikes.

Topics: AI investment economic history Federal Reserve policy S&P 500 stock rally