Rivian Automotive (NASDAQ: RIVN) stock soared more than 8% in early trading on the Nasdaq this morning. (Hurray!)

Then its stock turned tail, gave back most of its gains, and as of 10:30 a.m. ET, it was up only 1.6%. (Boo!)

Why did Rivian stock rise and then fall back again? The answer is just one word: (NASDAQ: AAPL).

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Source Fool.com