Electric cars

Tesla Shares Plunge in Sell-off

Had reached all-time high earlier in week

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Tesla shares, which soared to a new all-time high earlier this week, were thrown into reverse Tuesday in the biggest one-day drop the stock has seen since January 2012. The selloff is being driven by the highest trading volume in TSLA stock since May.

Halfway through the trading day, TSLA was down more than $15, a drop of greater than 12 percent.