Tesla Is a Great Product but Not a Great Stock, Says Shark Tank Star Kevin O'Leary

Shark Tank Star Kevin O'Leary is more fond of Tesla's (TSLA) - Get Report product than its stock.

"At some point it has to fall to gravity," he said. "It's been trading on a different planet for years and now it has to trade on Earth."

Tesla shares are up 48% since the start of the year. 

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