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'Mad Money' Lightning Round: Alexion, AIG Are Buys

Tickers in this article: AIG PANW CMG TRN UNP ALXN ZIP
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NEW YORK (TheStreet) -- Here's what Jim Cramer had to say about some of the stocks that callers offered up during the "Mad Money Lightning Round" on CNBC Friday night:

Chipotle Mexican Grill (CMG) : "I think Chipotle bottomed but let's wait for a pullback."

Palo Alto Networks (PANW) : "That's a good company but its too expensive."

Zipcar (ZIP) : "They have bottomed but I don't want to own it. The traditional rental companies are coming on strong."

Alexion Pharmaceuticals (ALXN) : "I think it's a terrific stock. I'd wait for the end of the year then pick some up."

American International Group (AIG) : "The stock has dropped and that's a mistake. I want to be a buyer."

Trinity Industries (TRN) : "I'd rather own an actual rail. I like Union Pacific (UNP) ."

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-- Written by Scott Rutt in Washington, D.C.

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