Shares of Berkshire Hathaway Inc. Cl B dropped 0.85% to $441.82 Thursday, on what proved to be an all-around poor trading session for the stock market, with the S&P 500 Index falling 0.78% to 5,

Berkshire Hathaway 's (NYSE: BRK.A) (NYSE: BRK.B) stock has risen more than 50% over the past three years as the S&P 500 rallied less than 30%. That continued Berkshire's long tradition of beating the S&P 500 over the past four decades.

Berkshire Hathaway's share price hit a record high on Monday, reflecting investors' confidence in Warren Buffett's company, which is often regarded as a microcosm of the broader American economy.

Shares of Berkshire Hathaway Inc. Cl B rose 1.53% to $445.61 Wednesday, on what proved to be an all-around mixed trading session for the stock market, with the Dow Jones Industrial Average rising 0.59% to 41,

Buffett’s interest in Chubb may have arisen due to various qualities, including a well-orchestrated 2016 merger and business practices that complement the Berkshire Hathaway insurance portfolio. Synergies between the two companies may change the trajectory of the property and casualty insurance business.

Shares of Warren Buffett's Berkshire Hathaway are headed for their first records in months. Class A shares recently traded above $637,000, higher than their March 28 record close of $634,440. The lower-priced Class B stock traded above $423,