Berkshire’s Performance vs. the S&P 500 Annual Percentage Change Year in Per-Share Book Value of Berkshire in Per-Share Market Value of Berkshire in S&P 500 with Dividends Included 1965 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.8 49.5 10.0 1966 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .