Warren Buffet’s firm joins S&P 100, upping share price

Berkshire Hathaway will replace Burlington Northern Santa Fe Corporation in the S&P 100 and S&P 500 indexes when Warren Buffett's deal to buy the railroad goes through, Dow Jones reports.

By entering the S&P lists, pensions firms will buy shares. This pushed the price of Class B shares of Berkshire up 7.4% to $73.01 in after-hours trading.

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