Cramer's lightning round: Invitae is a winner

• It's that time again! "Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Regenxbio: "It's a totally speculative situation. Don't put even ... a small percentage of your assets in it."

Laredo Petroleum: "I'm not a fan of Laredo. I'm not a fan of the balance sheet, I'm not a fan of the industyr right now, so I'm going to have to go against that one. Parsley's better by the way if you have to be in it."

MKS Instruments: "I like your strategy. You're doing it just right. ... I think it's good, let the rest run."

Invitae: "I think you've got a winner and I support it."

TG Therapeutics: "You know, it finally worked."

Vertex Pharmaceuticals: "I think this stock is undervalued. I think it could go up a lot."

Kinder Morgan: "If you have to own a pipeline company, it is at 52-week high, it's not bad, I just don't think you have to own these, but it's not bad."

Ventas: "It's a tough one ... but that was a disappointing last quarter. Plain and simple."

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