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NEW YORK (TheStreet) -- Here's what Jim Cramer had to say about some of the stocks callers offered up during the Mad Money Lightning Round Wednesday evening:

Arrowhead Research (ARWR): "This is the height of speculation."

Potbelly (PBPB): "I'm not touching it."

Opko Health (OPK): "I think the stock have moved up too much. I do like Opko. It's a good hold here."

Pioneer Natural Resources (PXD): "The oil complex is going down. Be careful until they find their level."

International Business Machines (IBM): "I'm going to say don't buy right now. I want to wait."

Hawaiian Holdings (HA): "I like that one."

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

To email Scott about this article, click here: Scott Rutt

At the time of publication, Cramer's Action Alerts PLUS had no position in stocks mentioned.