Red, interesting about the Vanguard funds. In particular VEXMX as it doesn’t invest in all the stocks in a particular index. They sampled Standard and Poor’s Completion Index, so they included Verb in their sample.The description is:

This fund offers investors a low-cost way to gain broad exposure to U.S. mid- and small-capitalization stocks in one fund. The fund invests in about 3,000 stocks, which span many different industries and account for about one-fourth of the market-cap of the U.S. stock market. One of the fund’s risks is its full exposure to the mid- and small-cap markets, which tend to be more volatile than the large-cap market. The fund is considered a complement to Vanguard 500 Index Fund. Together they provide exposure to the entire U.S. equity market.

Principal Investment Strategies

The Fund employs an indexing investment approach designed to track the performance of the Standard & Poor‘s Completion Index, a broadly diversified index of stocks of small and mid-size U.S. companies. The S&P Completion Index contains all of the U.S. common stocks regularly traded on the New York Stock Exchange, Cboe and the Nasdaq over-the-counter market, except those stocks included in the S&P 500 Index. The Fund invests by sampling the Index, meaning that it holds a broadly diversified collection of securities that, in the aggregate, approximates the full Index in terms of key characteristics. These characteristics include industry weightings and market capitalization, as well as certain financial measures, such as price/earnings ratio and dividend yield.