Berkshire Hathaway Inc. Cl B stock underperforms Thursday when compared to competitors

Shares of Berkshire Hathaway Inc. Cl B BRK.B sank 1.00% to $320.00 Thursday, on what proved to be an all-around rough trading session for the stock market, with the S&P 500 Index SPX falling 0.72% to 4,061.22 and Dow Jones Industrial Average DJIA falling 0.86% to 33,127.74.

This was the stock’s third consecutive day of losses.

Berkshire Hathaway…