Buying well-established businesses tends to work well for investors over the long haul. That is because such companies tend to dominate their industries, which fuels revenue and profit growth over time.

As the unquestioned leader among asset managers, (NYSE: BLK) has been an excellent investment during the past 10 years. But should investors still buy the stock? Let's discuss BlackRock's fundamentals and valuation to tackle this question.

With more than 40 million people invested in its iShares exchange-traded funds (ETFs), BlackRock is the largest asset manager in the world. This massive client base is what supports the company's leading $110 billion market capitalization. 

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Source Fool.com