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Investing Specialists

Great Diversifiers, 401(k) Oddities, and Vanguard's New Fund

We take a numerical look through this week's Morningstar research. Plus, our most popular articles and videos for the week ended May 31.

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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.

2.12% vs 1.82%
That's how much the median stable-value fund in Morningstar's database returned versus the median money market mutual fund during the past 12 months. Christine Benz takes a look at stable-value funds and other oddities that investors might find in their 401(k) plans. does not own (actual or beneficial) shares in any of the securities mentioned above. Find out about Morningstar’s editorial policies.