You can look at lots of business metrics. What ultimately matters most, though, is the ability of a company to generate cash.

With this in mind, three Motley Fool contributors were asked to pick stocks to buy right now that are cash cows. Here's why they chose AbbVie (NYSE: ABBV), Gilead Sciences (NASDAQ: GILD), and Vertex Pharmaceuticals (NASDAQ: VRTX). 

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Source Fool.com