Index fund is a kind of fund that grows synchronously with the market based on the principle of fitting the target index and tracking the change of the target index. According to the different types of assets, we can divide index funds into stock index funds, commodity index funds and bond index funds.

Stock index fund: it is a fund that tracks the trend of stock index. For example, tracking index funds such as Shanghai and Shenzhen 300, CSI 500, dividend index and small and medium-sized board.

Commodity index fund: it is a fund that tracks the trend of commodity index. For example, tracking index funds such as gold, silver and crude oil.

Bond index fund: it is a fund that tracks the trend of bond index. For example, tracking 10-year treasury bonds, 5-year treasury bonds, credit bonds and other index funds.