The Vanguard Group will close its $22.5 billion Vanguard Health Care Fund, according to a March 24 report from MarketWatch. The Valley Forge, Pa.-based company said the fund would be open only to existing shareholders and retirement plans.

The move comes at a time when assets in the fund have risen more than 50% over the last two years, thanks to market gains and shareholder demand, despite a hefty, $25,000 initial investment minimum.

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