article[BRK.B]Berkshire's operating profits were down 30% in the fourth quarter. (Michael Nagle/Bloomberg)[Berkshire Hathaway's] fourth-quarter earnings report and CEO Greg Abel's inaugural shareholder letter are landing with a thud in the stock market Monday as Berkshire stock is down 5%. Berkshire Stock Falls 5% as Earnings, Abel Letter Fail to Excite Investors - Barron'sSkip to Main ContentThis copy is for your personal, non-commercial use only. Distribution and use of this material are governed by our S ...