Fund giant Vanguard announced late Thursday that it has closed the $664 million Vanguard Global Equity fund to new investors.

In a prepared statement, the nation’s second largest mutual fund company said that the fund’s subadvisor Marathon Asset Management has stopped taking on new clients for global accounts with mandates similar to this particular fund’s. According to Valley Forge, Penn.-based Vanguard, Marathon took a similar step earlier this year because a rampup in new business had stretched its client service team thin.

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