Cramer's lightning round: CRISPR Therapeutics will work perfectly in this market

• 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.

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Qualtrics International Inc: "I really like XM as a long-term growth play. ... Let these guys do their work and then it's a buy."

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Clearfield Inc: "There's an analyst that cut numbers and the stock fell apart. That was ridiculous."

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CRISPR Therapeutics AG: "That's one of those crazy science stocks that in this market will work perfectly."

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