The electric car maker is the biggest company ever to join the S&P 500, the most widely tracked broad stock-market benchmark. Shares of Tesla have surged 70% since S&P Dow Jones Indices announced its planned addition in November, boosting the company’s market value to more than $650 billion.
That’s more than three times the value of Berkshire Hathaway, the second-biggest addition to the index by market value, when it was added to the S&P 500 in 2010. Tesla is currently the sixth-largest publicly listed firm in the U.S. by that measure.
https://www.wsj.com/graphics/tesla-stock-joins-the-sp500/
