Cramer's lightning round: This business is better than people think
It's that time again! Jim Cramer rang the lightning round bell, which means he gave his take on callers' favorite stocks at rapid speed: Groupon: "I think there's real worth here. I still think the stock could get to $5. The business is better than people think." Exelixis: "Development-stage biotech company. You know from Alder Bio that I'm a little...