Cramer's lightning round: Dump shares of Nio and buy Tesla instead

• It's that time again! "Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Vale S.A.: "I can't believe that I'm actually going to recommend Vale, but I'm going to recommend it because I just think this is a multi-year move. I do like Cleveland-Cliffs more, though, OK? Because I don't trust that whole country to get it right. Cleveland-Cliffs is better."

Nucor: "Listen to me on Nucor, it's a multi-year move. ... Remember, it is the best-performing stock in the S&P so far this year. When Nucor gets going, that is nothing. It's a multi-year move. The moves are either two or three years, so a reasonable price target? No. You have to have a reasonable timeline, and the timeline is several years out."

Nio: "You should be switching. You should be in Tesla. Remember the piece that we did with Larry Williams... a couple weeks ago which said this is the single best time to buy Tesla, right here, right now? That's what you're going to do tomorrow."

Social Capital Hedosophia Holdings Corp. V: "That's SoFi. I like SoFi. That's [CEO] Anthony Noto. He's on his game. I think you're fine with it. I'd buy some."

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