Cramer's lightning round: Resmed had a hiccup. That was a chance to buy

KEY POINTS

• 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.

ResMed: "I believe in [CEO] Mick Farrell. I know the stock had a hiccup, that was a buying opportunity. This is a good situation."

Gulfport Energy: Sell, sell, sell. "A weak fossil fuel is even worse than a good fossil fuel."

JD.com: "I do not like it."

Nucor Corp.: "If you want to own a steel stock it is the one to own. Otherwise, I gotta tell you it's a 9-times earnings, which is really unbeliablely low, but value is not working in this market and that's the problem. Value doesn't matter."

WATCH: Cramer's lightning round

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