Volume Spike Investor

Intuitive Surgical Inc. (Nasdaq: ISRG) shares are up more than 15 percent to $1976.10 in premarket trading as of 7:30 a.m., and were among the most active with more than 1.5 million shares after hours. The company posted better-than-expected earnings and revenue for the second quarter, with EPS of $1.62, or 37 cents above consensus. The company increased its procedure growth guidance for 2009 to more than 45 percent, vs. 40 percent previously. — Mike Tarsala