Does Warren Buffett Know Something Wall Street Doesn't? He's Done This 1 Thing for the First Time in 30 Years, and It May Be a Warning for Investors.

Berkshire Hathaway Inc. (BRK.B) stock price is 468.67 and Berkshire Hathaway Inc. (BRK.B) 10-day simple moving average is 467.50. Berkshire Hathaway Inc. (BRK.B) stock price is 468.67 and ...