About S&P MidCap 400

About Standard & Poor's

Standard & Poor's® (S&P), is an organization known around the world for its independent credit ratings, risk evaluation, investment research, data and valuations, and indices. For more than 140 years, the financial community has looked to S&P for information on many complex investment types.

About the S&P MidCap 400

Introduced in 1991, the S&P MidCap 400 is now the most widely used index for mid-sized companies. It is a weighted index in which each company's influence on index performance is directly proportional to its market value. It covers approximately 7% of the U.S. equities market.

See all 400 companies of the S&P MidCap 400