Shares of Berkshire Hathaway Inc. Cl B inched 0.68% higher to $459.71 Thursday, on what proved to be an all-around favorable trading session for the stock market, with the S&P 500 Index rising 1.

Warren Buffett’s Berkshire Hathaway recently joined a rarefied club of companies valued at $1 trillion. Not everyone’s celebrating, though.The powerful rally that lifted the Omaha, Neb.-based company’s market value above the trillion-dollar threshold has some investors and analysts thinking its shares look a little pricey.

Though he came to Berkshire as a raw rookie in insurance, Jain was “handed the keys to our small and struggling reinsurance

Shares of Berkshire Hathaway Inc. Cl B slipped 0.02% to $456.60 Wednesday, on what proved to be an all-around grim trading session for the stock market, with the S&P 500 Index falling 0.29% to 5,618.26 and Dow Jones Industrial Average falling 0.