In large companies, such plans are often administered by big mutual fund companies like Fidelity Investments, Vanguard Group and T.

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Mutual fund pioneer John Bogle, the founder of The Vanguard Group, offers this rule of thumb for investors: Own the same percentage of bonds as your age.

NPR: Vanguard Founder Advises Riding Out The Storm

No-frills Vanguard Group , the second-largest U.S. mutual fund company, is attracting a number of investors who are willing to pay for fee-based financial advice.

FORBES: Magazine Article