There are several types of open-end funds: currency, bond, capital preservation and stock. There is no redemption fee for the money fund, and the income is equivalent to six months to one year's deposits, which can be redeemed at any time without loss. The subscription and redemption costs of bond funds are relatively low, and the income is generally greater than that of money funds, but there is also a risk of loss, and the loss will not be great. Stock funds have the highest subscription and redemption costs, and the fund assets are stocks. When the stock market falls, the fund will have the risk of losing money, but when the stock market rises, there will be gains. Judging from the past trend of foreign fund markets, through long-term investment, the average annual return rate of stock funds is about 18%~20%, and that of bond funds is 7%~ 10%. There may be ups and downs in the meantime, and investment is also a kind of persistence. Mentality is the key! Many people also know this truth, but in the end they still can't hold on and give up when they see the loss! So stick to it!