Berkshire Hathaway shares fall as Buffett to step down as CEO at year-end

Berkshire Hathaway (BRK-B, BRK-A) stock fell over 2% in premarket trading on Monday after Warren Buffett said he will step down as CEO after 60 years at the helm of the conglomerate. The investing legend made official this weekend plans to hand the helm to the company's vice chairman, Greg Abel,…