Warren Buffett Cautions Investors While Sandisk Tops S&P 500 Gains in 2026

At Berkshire Hathaway’s annual meeting, Warren Buffett warned that "we've never had people in a more gambling mood than now," noting the market’s high valuation. The Buffett indicator, which compares total U.S. stock market value to GDP, has risen above 233%, a level historically linked to heightened risk. Meanwhile, the S&P 500 has climbed roughly 10% so far in 2026, but performance among its components varies sharply.

Memory‑chip maker Sandisk has been the standout performer, surging about 800% after a global shortage of memory chips drove prices higher amid the AI data‑center build‑out. Analysts expect the shortage to persist through 2026‑27, giving Sandisk continued upside. By contrast, Intuit has fallen around 60%, while Nvidia is projected to deliver strong returns in the second half of the year as AI spending accelerates.

Investors are urged to focus on quality businesses with solid fundamentals and maintain a long‑term buy‑and‑hold approach, rather than chasing speculative gains that could suffer in a future market correction.