CHIP STOCKS HIT RECORD SHARE OF S&P 500 Semiconductor stocks now make up a record 19.7% of the S&P 500, nearly four times their 2020 weighting, driven by the AI boom. The surge has fueled concerns over market concentration and stretched valuations, though strong ETF inflows continue to support the sector. Investors are watching whether AI spending can justify current chip stock prices.(*Walter Bloomberg)