Berkshire Hathaway class A Trades for $300,000 per Share

Berkshire Hathaway class A shares traded for $300,000 for the first time this morning. Berkshire class B shares traded at $200 for the first time (Berkshire A trades at 1500 times Berkshire B.)  $1,000 invested in Berkshire 52 years ago would be worth about $20 million today. The same amount invested in the S&P 500 would be worth about $130,000.
(Values were calculated using the compounded annual  gain of 20.8 percent from 1965-2017 for per-share market value of Berkshire, and the compounded annual gain of 9.7 percent from 1965-2017 in the S&P 500, with dividends included.)