There are many aspects of Intuitive Surgical's ( ISRG 0.88% ) business to appreciate. However, as famous investor Benjamin Graham one said, a good company can be a bad investment if you pay too much for it. After a big rally in Intuitive Surgical's price following third-quarter earnings, is the stock worth buying in December?

What does Intuitive Surgical do?

From a big-picture perspective, Intuitive Surgical makes surgical robots. It was one of the first to market with a robotic-assisted surgery (RAS) system, and its products are highly respected. At the end of the third quarter of 2025, there were 10,763 of its da Vinci surgical robots operating around the world.

The opportunity for surgical robotics is huge. That's highlighted by two other statistics from the third-quarter e

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