

Tesla’s Battery Day Was Full of Promising News. Why Its Stock Is Falling Anyway.

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Wall Street has been waiting for Tesla’s battery technology day for months. Anticipation for the event has growth with Tesla’s share price.

Tuesday evening, in a setting that resembled a drive-in movie with hundreds of Tesla vehicles sitting in a California parking lot, CEO Elon Musk listed several innovations designed to cut battery cost per kilowatt-hour in half.