Amgen's ( AMGN) shares should be doing better after the quarter the company reported Thursday, Jim Cramer said on CNBC's "Stop Trading!" segment Friday. "Amgen is pharma, why don't people understand that?" Cramer said. "It should be up more than $3. That's the biggest beat I've seen in the drug world" this earnings season. Cramer said the steady improvement this week in shares of Abbott Labs ( ABT) is "a prelude to Lilly ( LLY) trading up next week." Both had "good, but not fabulous, quarters," Lilly's coming earlier Friday. Defensive stocks peaked this week, at least for now, Cramer said. Let big drug stocks and the banks "come in a little" before buying them again, he said. Meanwhile, the buying of bearish options positions in infrastructure and oil-field services stocks suggests a bounce is due in the sectors. Unlike in previous market cycles, such companies are no longer solvency risks and the cycle has more room to run. Citing Schlumberger's ( SLB) conference call this morning, Cramer said: "You might think it's over but the companies know it isn't." He also said: "Their balance sheets are things of beauty. They're not going under." At the time of publication, Cramer had no positions in stocks mentioned.