Lightning Round: It's become too hard to play

It's that time again! Jim Cramer rang the lightning round bell, which means he gave his take on caller favorite stocks at rapid speed:

Aqua America Inc: "It's a very consistent stock. It doesn't have upside, frankly, and it really has not worked out the way that I first thought it would. But it's not bad. And as far as I'm concerned you can own it. But 25 percent of your portfolio? No, we don't like anything to be more than 20 percent so you're going to have to trim that back a little. I know your [cost] basis is probably low. Pay the taxes, and cut it down."

Medical Properties Trust Inc: "I think this segment has now gotten too hard for me. I know it yields 7.5 percent, but that is a a sign of a red flag now. We are going to have to go with Ventas, okay. We are just going with Deb Cafaro [Ventas CEO]. This one's too difficult for me. I've liked it in the past, but it's too hard."

Biogen: "Biogen has come down a lot, and they took a lot of the air out on the stock and yet, you know what? I would still rather see you in Celgene, which I think has a better track record and is not hype oriented. Unfortunately I have to tell you I think Biogen has become."

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Vanguard Natural Resources: "It's too risky! Come on, man. That 15 percent yield is a definite red flag. That stock is going to be down there giving you the business if you're not careful."

Raytheon Company: "Raytheon is an easy one. Arm of the world because the United States is no longer the policeman. Raytheon is a buy."

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