MP Materials Corp. (NYSE:MP) is one of the stocks Jim Cramer had in this week’s game plan. Cramer called it one of the “good ones,” as he remarked: “We got a couple real good ones lumped in here today. We got Affirm for buy now, pay later, Sandisk for tech storage, and MP Materials for rare earth materials. All three have had, they’ve had tremendous stories to tell for a while now. Although Sandisk has had a huge and now parabolic run, and I, you know, I don’t like to recommend the ones that are in parabo ...