Tesla plunges 21% after S&P snub and GM stakes Nikola

By Kit Rees and Stefan Nicola | Bloomberg
Tesla shares fell the most ever Tuesday after the electric-vehicle maker missed out on being included in the S&P 500 Index, taking investors who had bet on its entry to the benchmark by surprise.
Tesla shares closed down 21%. Declines started premarket and worsened as General Motors Co. said it would take a $2 billion equity stake in Nikola Corp. and partner with the fledgling truck maker to engineer and manufacture its Badger pickup. The news lifted