Closed-end funds can look at income. During the period of fund closure, the net value of fund shares shall be announced at least once a week, usually on Friday. After the net value of the fund is announced, investors can probably calculate the income of the fund. Among them, the length of the fund's closed period is not directly related to the fund's income. The fund closure period means that the application for subscription and redemption of the fund is not accepted for a period of time after the fund contract takes effect, mainly for the fund manager to make preliminary arrangements for the raised funds according to the market conditions within a certain period of time. The fund closure period will generally not exceed 3 months.

Closed period is a period that open-end funds must go through, which can provide a relatively stable opening process for funds. The closure period of each fund varies with the type of fund. The so-called fund closure period refers to the time when the fund manager cannot accept the subscription, redemption and other businesses within the time limit stipulated in the fund contract and prospectus at the initial stage of the establishment of an open-end fund.

On the one hand, the closure period is set to facilitate the fund's backstage registration center and make the best preparation for future subscription and redemption; On the other hand, the fund manager can complete the preliminary investment arrangement according to the situation of the securities market. Because the investment income is related to the scale of funds, and the stability of the scale of funds is an important prerequisite for fund managers to control their positions.

The process from raising funds to investing in open-end funds needs to go through four periods, namely, raising period, capital verification period, closing period and normal subscription and redemption period. During these four periods, investors bought and sold fund shares in different ways.