Vanguard 500 Index Fund Summary Prospectus

Vanguard 500 Index Fund Summary Prospectus The Securities and Exchange Commission (SEC) has not approved or disapproved these securities or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense. April 12, 2013 Vanguard 500 Index Fund Investor Shares (VFINX) Vanguard 500 Index Fund Admiral Shares ... ................
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