Cramer's lightning round: WW is not a buy - CNBC

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

Joby Aviation Inc: "Way too speculative. I don't want you in there. ... It's had its day already."Sign up now for the CNBC Investing Club to follow Jim Cramer's every move in the market.Questions for… [+233 chars]

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