Cramer’s lightning round: I say thumbs up to MP Materials

MP Materials Corp: “I say, thumbs up, MP Materials.”

RPC Inc: “I want you to hold [onto] it.”

Marvell Technology Inc: “You don’t want to buy until it reports. After it reports, we’re going to take a solid look at it. … If you do own it now, you’ll do just fine.”

Li Auto Inc: “Listen to [Tesla CEO] Elon Musk on the conference call. He likes the Chinese automakers. Who am I to go against the smartest man in the world?”