Cramer's lightning round: NiSource is a buy

• 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.

Nio: "Pass, pass, hard pass. Going elsewhere. We're not fooling around anymore."

Canopy Growth Corp.: "If you like Canopy Growth, just go buy Constellation. I want the exposure to the rest of the stuff. I need an integrated company."

NiSource: "There's a stock I want to own. Very reliable, good dividend, fantastic management. Buy, buy, buy."

Coupang Inc.: "You know what, it's the largest deal. I've been studying the company for a while now given the fact it frankly just does nothing but go down. I think you can start a position here, and no more."

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