Lightning Round: Don't you dare trade this

It's that time again! The Lightning Round bell has rung, and Jim Cramer gives his take on a few favorite audience stocks:

Seagate Tech: "I think it's stalled right here, because in the end it is still related to PCs. But Seagate is a very inexpensive stock, and I would not trade it."

Paccar Inc: "It acts much better than Cummins, to tell you the truth. I happen to believe that the truck build is going to be good, so I am on the side of Paccar."

Disney: "Disney has two catalysts; it's got "Star Wars" coming up in the fourth quarter and it's got Shanghai Disney next year. So you've got to hold on to it and hope it comes down so you can buy some more Disney."

Read more from Mad Money with Jim Cramer
Cramer Remix: Why you need to avoid Chinese stocks
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Exelixis, Inc: "It's another cancer play that is very, very speculative. Far more speculative than the previous one that we talked about. Let's be careful out there."

Student Transportation Inc: "This thing is now yielding eight percent, and that is where I start getting nervous because I don't like that kind of high yield. Why? because it's a classic red flag."

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