Many of the greatest investors of all time could be considered value investors. A value investing strategy centers around buying stocks at less than their fair value -- often much less.

One stock that seems to be greatly undervalued right now is pharmacy chain and health insurer CVS Health (NYSE: CVS). Let's take a peek under the hood at its fundamentals and valuation to better understand why the stock could be a no-brainer buy for value investors this month and beyond.

CVS Health is so massive in scope that it serves 100 million people each year -- approximately 1 in 3 Americans -- in at least some capacity. This includes not only its retail stores but also its Caremark business, which manages prescriptions, and its Aetna business, which provides health insurance to members.

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Source Fool.com