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Tesla shares plunge as Musk is on the defensive

Photo: Chuck Burton / AP

Tesla shares plunged by as much as 5% in after hours trading and CEO Elon Musk was on the defensive in an earnings call as the electric-carmaker reported a $619.4 million loss today — its biggest ever. Again and again, the usually chest-out Musk told Wall Street analysts about the growing pains of ramping up to produce hundreds of thousands of cars a year, at one point declining even to forecast how many units of the ostensibly company-changing Model 3 Tesla would produce in the last quarter of the year, apart from finally saying it will be in the thousands per week.

"We are in a vertical climb here," he said of the company's ramp-up difficulties.