(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 shares fell roughly 1% this week while the S&P 500 edged 0.6% higher, ending the week at a fresh all-time high . The A  and  B shares are now down 13% from their all-time closing highs almost a year ago in early May, just before Warren Buffett revealed he planned to step down as CEO at the end of 2025. The S&P has gained 26% over the same period. Berkshire's stock price drop, however, is making the shares more attractive to some. In a featured  Barron's analysis , Andrew Bary writes that at the company's current price "not a lot has to go right ...…