This episode of The Motley Fool's Market Checkup drills down on the days hottest headlines and plays a game of investing chicken with the world's biggest biotech. Market Checkup gives a full examination of the recent regulatory action around potential new generic threat to a big-time blockbuster drug and looks at a study questioning the benefits of robotic surgery.

In this video, health-care analysts David Williamson and Max Macaluso play the always popular game of investing chicken with Gilead Sciences. The rules of the game are simple: What would have to go wrong with Gilead before it became a bad investment? Watch and find out how competitive threats and product launches can alter a bullish investor's perception of a stock.