(This is the Warren Buffett Watch newsletter, news and analysis on all things Warren Buffett and Berkshire Hathaway. You can sign up here to receive it every Friday evening in your inbox.) Berkshire Hathaway's B shares have rebounded 7.2% higher since their near-term closing low of $459.11 on August 4. At that point, they had dropped almost 15% in the wake of Warren Buffett's surprise announcement in early May that he will be stepping down as CEO at the end of the year. That gives BRKB a YTD