1. Fund share: refers to the certificate issued by the fund sponsors to investors, indicating that the holder enjoys the right to distribute income, the right to obtain the remaining property after liquidation and other related rights according to his share, and undertakes corresponding obligations.

2. Net share value: it is the value currently purchased. Cumulative net worth is the value calculated by adding the net stock value to the original dividend. Although some funds have low net worth, they have paid more dividends in the past, so the accumulated net worth is high, and such funds are more worth investing in.

3. Reference market value: The net value of open-end funds changes at any time. The net value of the fund will be calculated and announced after the market closes every day, but you can only buy or redeem the fund during the trading hours, so the net value of the fund during this period is actually unknown. In order to give investors a reference, there will be a reference market value, which is very small from the final net value of the day. Investors can calculate the profit and loss of their own funds according to this reference market value, and then choose to continue holding or selling.