Tesla challenger Rivian just announced a $700 million investment led by Amazon (AMZN)

Rivian has announced that Amazon would lead a $700 million investment round in the truck- and SUV-focused electric-vehicle startup.
Rivian has been seen as a rival to Tesla in the pickup segment; Tesla has yet to unveil a pickup.
Reports had circulated that General Motors would join Amazon in the investment, but Rivian's announcement did not mention GM participation.On Friday, the truck- and SUV-focused electric-vehicle maker Rivian announced a $700 million investment round led by Amazon.
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