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CNBC's Jim Cramer cautioned investors against chasing shares of Cerebras Systems

after its explosive market debut Thursday.

"While there might be a situation in the future where I can recommend Cerebras, I just can't even come close to justifying the valuation up here given how much it's already run right out of the gate," the "Mad Money" host said. "For now, I say keep your bat on your shoulder and hope the stock gives you a giant pullback. Because at these levels, it's too rich for me."