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Vanguard is a leading mutual fund company.

Expanded Definition

Vanguard is best known for its index mutual funds. Vanguard 500 Index Fund (ticker VFINX) can be regarded as the best known S&P 500 index fund. However, the company has expanded to offer numerous other funds including sector funds, bond funds, and exchange traded funds.

Vanguard continues to emphasize low costs to the investor. It is famous for the lowest expense ratios.

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