Plenty of companies operate behind a business moat, which makes it hard for competitors to steal their thunder. Intuitive Surgical (NASDAQ:ISRG) made its moat a mile wide, filled it with boiling acid, and populated it with mutant alligators.

In this video, Fool contributor Anders Bylund explains why he owns Intuitive Surgical's stock and what it would take to wrest the shares from his iron-fisted grip. Spoiler alert: It takes much more than some upstart competition, because most companies will find it very difficult to even enter the robotic surgery market.

Fool contributor Anders Bylund owns shares of Intuitive Surgical, but he holds no other position in any company mentioned. Check out Anders' bio and holdings or follow him on Twitter and Google+.

The Motley Fool owns shares of MAKO Surgical. Motley Fool newsletter services have recommended buying shares of Intuitive Surgical and MAKO Surgical. The Motley Fool has a disclosure policy.

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