Chip Somodevilla / Getty Images Quick Read Berkshire Hathaway has been underperforming the S&P of late. Warren Buffett’s looming retirement is a concern for some. With the Mag Seven exposure in the S&P, questions linger as to whether Berkshire Hathaway stock can keep up with the S&P in the AI age. Buffett’s successors have AI on their crosshairs, but they’re also in no rush to pay up for admission, especially as valuation concerns mount. Some investors get rich while others struggle because they n ...