Cramer's 'Mad Money Lightning Round': Ameritrade Makes the Grade

To see a full "Mad Money" Recap, please click here.

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Here's what Jim Cramer had to say about some of the stocks that callers offered up during the "Mad Money Lightning Round" Monday evening:

NitroMed(NTMD Quote): "Ten million [shares] of it is short. ... I'm not backing away from NTMD. I think you should buy it."

Cell Genesys(CEGE Quote): "Forget the Cell Genesys. (Cramer prefers Amgen(AMGN Quote).)

Powerwave Tech(PWAV Quote): "Powerwave is the company that augments the towers from cell phones. ... I think you do a 'mon back* on the pullback."

World Fuel Services(INT Quote): "There's really no edge to that stock. ... Let's ring the register and buy some higher quality."

Chesapeake Energy(CHK Quote): "The stock could actually go down to 25, and a lot of folks won't be able to take the pain. ... My take is that Chesapeake's a keeper."

Nektar Thearpeutics(NKTR Quote): "Not for me."

Ameritrade(AMTD Quote): "One of the greatest plays on the Net. They're survivors, they put it together. Two thumbs up, way up."

Southwest(LUV Quote): "Southwest is spiking here. I believe it could have a couple more days on the upside."

National City(NCC Quote): "That is exactly what you should own when the Fed decides to stop this nonsense."

Equitable Resources(EQT Quote): "This is one of those natural resource plays ... I think Equitable with a 2% yield is not attractive."

Constellation Brands(STZ Quote): "I am not a chartist. This Constellation Brands has turned from one of the greatest stocks in the past five years to the House of Pain."

Atmel(ATML Quote): "This is the kind of three-buck integrated circuit play that will put you in the [House of Pain]."

JDS Uniphase(JDSU Quote): "They are telling a compelling story. ... I like their different divisions. ... Perhaps maybe a baby bull."

Brown & Brown(BRO Quote): "Really good insurer. Doesn't get talked about enough. ... This company knows how to run a good business."