The Vanguard Group of Valley Forge, Pa., announced that the board of directors of its Vanguard Capital Opportunity Fund has raised the fund's minimum initial investment from $3,000 to $25,000 for new accounts in an effort to curb rising inflows into the fund.

The new minimum was to be effective at the close of business Sept. 20. Existing accounts will not be subject to the change, the announcement said.

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