Yes, index funds earn bid-ask spreads in addition to dividends. Index funds mainly earn bid-ask spreads, buying at a low price and selling at a high price to gain income. For example, when investors buy the fund, the net value is 1, and when they sell it, the net value is 1.22, so each fund can get a difference income of 0.22.

Investors should pay attention to the fact that dividends from index funds will not bring benefits to investors. Fund dividend refers to the distribution of part of the fund net value to investors, that is, the distribution of investors' own money. After the fund pays dividends, the net value will decrease, so the fund will not bring benefits to investors.

When investors invest in index funds, they can choose high-quality index funds for investment, because the probability of investing in index funds is relatively high. High-quality index funds are selected from three aspects: historical performance, withdrawal and fund manager. Historical performance: historical performance is the income since the establishment of the fund, and the higher the historical performance, the better the fund. Retreat: Retreat is the interval from the highest to the lowest net value of the fund in a period of time. The lower the retreat, the more stable the fund is. Fund manager: The fund manager is the manager of the fund. The higher the investment level of the fund manager, the better the fund.