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Tesla is pricing its second offering of stock at $767 apiece.

An announcement Thursday that Tesla would put an additional $2 billion worth of stock on the market surprised almost everyone.

Just two weeks ago, CEO Elon Musk said the company didn't need to raise any more money.

But it's taking advantage of seemingly insatiable demand for its stock.

Tesla shares have almost doubled since the start of the year, and it's quadrupled since June.

That demand continued to surge Thursday, even though issuing additional company shares can dilute the value of those already on the market.

Shares closed up another 5%. Shares of Tesla Inc. are essentially flat Friday before the opening bell.

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