Someone (Alec?) was talking a while back about using the wilshire 4500 as a primary holding and skipping the s&p 500. Some of the top holdings in the 4500 index actually qualify as large cap stocks and you end up with a much heavier weight of mid and small cap stocks. The breakdown of the 4500 has a nice smooth mix of large, mid and small cap companies.
Yes, see DFA recommendation conversation.
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- Alec