Bengaluru/San Francisco — Shares of Tesla rose 11% before the bell on Tuesday, adding about $40bn to the value of the electric vehicle (EV) maker and giving another boost to the fortune of billionaire CEO Elon Musk.

S&P Dow Jones indices confirmed, after markets closed on Monday, that they would add the company to Wall Street’s main index from December 21, firing the starting gun on a major reorganisation of investment funds that track the basket of stocks...

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