India, Oct. 12 -- The S&P 500 has seen strong gains in recent years. After a difficult 2022, the S&P 500 rose 24% in 2023, 23% in 2024 and around 16% in 2025. The Nasdaq Composite, which has a strong focus on technology companies, performed even better, rising 43% in 2023, 29% in 2024 and 20% in 2025. Both indexes continued to rise in 2026, mainly because of growing excitement around artificial intelligence.

However, a small group of technology companies is driving much of the market's growth. This means the stock market's strong performance depends heavily on a limited number of large companies. If these companies face problems, the wider market could also suffer.

Investors are now worried about a possible AI stock market bubble. The b...