Open-end fund refers to a fund operation mode in which fund sponsors can sell fund shares or shares to investors at any time according to their needs, and can redeem the issued fund shares or shares at the request of investors. Investors can buy funds through fund sales agencies, so that the assets and scale of the fund will increase accordingly, or they can sell their fund shares to the fund to recover cash, so that the assets and scale of the fund will decrease accordingly.

Open-end fund refers to an investment fund whose scale is not fixed, but which can issue new shares or be redeemed by investors at any time according to market supply and demand. Closed-end fund is relative to open-end fund, which refers to the investment fund whose fund size has been determined before issuance and remains unchanged within the specified period after issuance.