1. Select an index fund with a low fund valuation for fixed investment. The lower the valuation of the fund, the less risk investors take.

2. Choose an index fund with small tracking error for fixed investment. The lower the tracking error of fund, the smaller the gap between fund and tracking index.

3. When index funds fall, fixed investment will reduce costs. The lower the cost, the smaller the risk of the investor's cost, and the higher the probability of gaining income in the future.

Long-term investment is meaningful only if it is fixed for a long time, and historically, the probability of long-term investment is relatively high.

5. Choose a fixed investment on Thursday. Historically, the probability of falling on Thursday is greater than rising, and a fixed investment on Thursday will make investors' costs lower.

Extended data:

How to invest in index funds?

1. The tracking index error of fixed investment is small.

The higher the fitting degree between the selected index fund and the tracking index, the higher its accuracy, the more accurate the expected return valuation, and the more obvious the advantages of the index fund.

2. Funds with balanced investment risks and expected returns.

Excellent fund issuing companies will have a strong ability to resist risks, and the corresponding credit risks and financial risks will be greatly reduced. The lower the net investment value of the fund, the more dispersed the costs and risks.

3. Index funds with low return on fixed investment

Choosing funds with lower service fees, management fees and subscription fees can reduce investment costs and improve profitability.

Because it is a fixed investment method, people can pay more attention to long-term profitability, while short-term price fluctuations or declines can effectively reduce the average cost.