Best Trades Now: Biotech, Energy & Defensive Stocks

With the markets selling off again today, CNBC asked the experts for their best investment ideas now.

Betting on Biotech

“We like Celgene. It has a product on the market…for hard-to-treat blood cancers…and we also like Seattle Genetics, a great company working on the antibody space.”

Mark Monane, Needham & Co. Biotech Analyst

Playing Defense

“With IBM as well as with the other stock [Heinz ], there are two common threads. We like the fact that they have defensive characteristics, and when you look out on the horizon there’s a lot of uncertainty. They also have unique momentum trends going on.”

Keith Wirtz, Fifth Third Asset Management

Energizing Your Portfolio

"Why is it impossible for an oil and gas company to be a growth business? We didn't think that was the case in health care in the 1980s, or in technology in the early '90s, and yet those businesses all became growth businesses."

Jerry Castellini, Castleark Management Chief Investment Officer

Castellini likes: Petrohawk, Southwestern Energy, Ultra, Nabors Drilling, National Oilwell and Rowan Drilling