Berkshire’s Corporate Performance vs. the S&P 500 Annual Percentage Change Year in Per-Share Book Value of Berkshire (1) in S&P 500 with Dividends Included (2) Relative Results (1)-(2) 1965 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.8 10.0 13.8 1966 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .