1, the performance transparency is high. When investors see the increase of the target index tracked by index funds, they will know the approximate increase of the net value of the index funds they invest in.

2. The liquidity of index fund portfolio is better than that of general centralized shareholding.

3. The cost of investing in index funds is low, because index funds are generally "buy and hold" investment strategies, so the transaction costs are relatively small, and the management fees charged by fund managers are also low.

4. Index funds are passive investments, so investors don't have to worry about the impact of fund manager changes on fund performance.

5. In the long run, index funds can beat most active funds.

6. In the long run, the stock index is generally upward, and investment index funds are profitable.