Berkshire trails red-hot S&P 500 by biggest margin so far this year

Mihaela Păun

(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.) With hot tech stocks fueling its solid 5.1% gain in May, the S&P 500 closed Friday at a fresh record high . In a sharp contrast, shares of Berkshire Hathaway were close to unchanged for the month. As a result, Berkshire's widely held B shares are now running 16.3 percentage points behind the benchmark index