It's an index fund that follows precise and mechanical stock selection rules. Being a "total market" index fund it is required to have some microcaps. It's been a fabulous holding for 35 years. Current expense ratio is about 0.10%. Doubt fund management knows almost anything about their microcap holdings which probably comprise about 5% of the portfolio.
One other thing. Current Portfolio Turnover: 4.0%! So it's an extremely efficient and tax advantaged way to invest.
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