1. A mutual fund that invests in the stocks that are the basis of a well-known stock or bond index
   "Many investors choose index funds for their low fees and broad market exposure"
    
2. A mutual fund whose assets are stocks on a given list
   "The index fund tracked the performance of the S&P 500"

Derived forms: index funds

Type of: mutual fund, mutual fund company, open-end fund, open-end investment company

Encyclopedia: Index fund