Tesla Inc. shares slid on Tuesday after the EV 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 Tuesday's trading down 21 percent to $330.21, the biggest one-day loss since early February. Declines started premarket and worsened as General Motors 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.
Broader markets also fell across the board.
Ahead of the S&P’s Friday announcement, Tesla’s price had largely reflected the assumed inclusion, said Baird analyst Ben Kallo, who called the decision “a relatively surprising development.” Instead of Elon Musk’s Tesla, S&P Dow Jones Indices added online retailer Etsy Inc., chip gear maker Teradyne Inc. and medical technology firm Catalent Inc.
“We think shares were reflecting expectations for substant…