Includes approximately 10% of the capitalization of U.S. equity securities. These are comprised of stocks in the middle capitalization range. At the original time of screening, this was a $200 million to $5 billion market value range. Any midcap stocks already included in the S&P 500 are excluded from this index, which started on December 31, 1990. The level of the index reflects the total market value of all 400 component stocks relative to this date. A level of 135, for example, indicates that the market value of the index portfolio has risen 35% from December 31, 1990. The S&P 400 figure is presented as a total return. For more information, visit the Standard & Poor's Web site.
Note: We assume reinvestment of dividends on the last day of the month rather than everyday during the month. This may account for differences between the index returns published in Morningstar Office and the index returns published elsewhere.