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.

2. Classify according to the representativeness of indicators.

Among all index funds, stock index funds are often contacted by everyone. If we subdivide these stock indexes, we can subdivide these stock index funds into comprehensive index, broad base index and narrow base index.

Composite index: This kind of index reflects the overall trend of all stocks. For example, the familiar Shanghai Composite Index is an index that reflects the performance of all stocks in Shanghai Stock Exchange.

Broad-based index: This kind of index selects the underlying index from the whole market. Not biased towards a certain industry or a certain theme, such as the Shanghai and Shenzhen 300 Index and the CSI 500 Index.

Narrow base index: This kind of index refers to the index that selects the target from a specific range, such as industry index (medicine index, consumption index), theme index (environmental protection index, pension index, Belt and Road index) and so on.