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Investing Specialists

Morningstar Runs the Numbers

We take a numerical look through this week's Morningstar research. Plus, our most popular articles and videos for the week ended March 23.

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Inspired by Harper's Index (with a tip of the hat to FiveThirtyEight's Significant Digits blog), Morningstar Runs the Numbers uses a numbers-based approach to highlight recent Morningstar research, along with some outside news stories.

As  Berkshire Hathaway (BRK.B) has grown in size, its growth prospects in many ways have become more limited. Some analysts, including Morningstar's Gregg Warren, have raised concerns that the firm may have trouble growing as rapidly as it did in the past. While Warren Buffett is the world's greatest living investor, it's possible to find mutual funds that employ a similar patient, quality-conscious strategy and do so in a more nimble package. Our manager research team discusses three such funds. does not own (actual or beneficial) shares in any of the securities mentioned above. Find out about Morningstar’s editorial policies.