Michael Buek, who has been with Vanguard since 1987 and has worked on index funds since 1991, has worked on this fund since its 1994 inception. He took over as lead manager in 2005. The fund's former manager, Gus Sauter, who also is Vanguard's CIO and index specialist, still supervises this offering and others run by Vanguard's quantitative equity group.
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