Lightning Round: This is a risky stock

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

Alcoa: "The stock is up huge, but I think it's stalled right here waiting for the next quarter. And I want to buy it because the price of aluminum is going higher."

Prospect Capital: "It's got a big yield, but who knows what they really own. It's one of those mezzanine finance companies, and those companies are out of favor and I'm not going to try to bring them back in favor."

HCA Holdings: "The Supreme court review made me feel like I too had to back away from HCA. I think you have to wait now, because it's had an amazing run and now you have this new wrinkle that makes it too hard to own."

Yelp: "This is a long-term situation. It is a risky stock, they have to keep adding listings ... I think Yelp is the online yellow pages for the future, but the future is going to get very rocky."

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Solarwinds: "It's very hot management software. I think the stock has moved up too much and I'm not going to touch it. I prefer"

Groupon: "I'm a little biased with Groupon because we had a major crash at the restaurant that I own, with their software. It was very disturbing to me ... the quarter was good but I'm going to have to spend more time looking into it, because the crash is such that I don't really understand it."

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