MDYV selects stocks with the strongest value characteristics from the S&P mid-cap 400 (the parent Index). The fundamental value characteristics include: book value, earnings, and sales to price ratio. The fund's portfolio has a slightly less value exposure due to the S&P Style Indices methodology that divide the complete market capitalization of each Parent Index into growth and value segments resulting in a basket of stocks that overlap with core and growth funds. The underlying index is market cap-weighted and undergoes annual rebalance on the third Friday of December.