The S 500 now yields just 1.4% as companies that don't pay dividends or have low yields make up a larger share of the broader market. Investors looking for passive income may be turning to stocks with higher yields and track records of dividend raises.

Walmart (NYSE: WMT), WM (NYSE: WM) (formerly known as Waste Management), and Sherwin-Williams (NYSE: SHW) consistently buy back shares and raise their dividends. But they now yield less than the S 500.

Here's why these three dividend stocks are too successful for their own good, and why great companies can become poor sources of income over time.

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Source Fool.com