Berkshire Hathaway Class B shares jump after Warren Buffett's company reported better than expected earnings for the second quarter.
Class B shares rose 2.8% on Monday after the results.
The company's stock has lagged the market this year. Its shares rose 1 percent from Friday to Friday, up 6.2 percent versus the S & P 500.
Each Berkshire Hathaway Class A Share is convertible into 1,500 Class B Common Shares at the option of the holder.