The stock was last quoted at $452.50, down 4.7%, on volume of nearly 110,000, according to Nasdaq.com. Based on Thursday's regular-session close at $474.65, the shares have risen more than 60% in the past year, hitting a 52-week high of $443 in October. The company said it sold 152 of its da Vinci robotic surgery systems in the latest quarter vs. sales of 124 systems in the same period a year ago, and 133 systems in the third quarter. Wall Street had cooled on Intuitive Surgical ahead of the report, mainly because of valuation, with 11 of the 17 analysts covering the shares at either hold (10) or underperform (1), and the median 12-month price target at $467.50. Check out TheStreet's quote page for Intuitive Surgical for year-to-date share performance, analyst ratings, earnings estimates and much more.