Open trading of funds means that funds can be purchased and redeemed at any time, with no restrictions. The public trading of funds is generally aimed at open-end funds, and closed-end funds cannot be traded publicly. The scale of open-end funds is not fixed, and investors will issue or redeem new shares according to market demand, thus reducing their share. The price of closed-end funds will generally go through the process of first premium and then discount.

The fund open day is the time for investors to handle business status such as subscription, conversion and redemption.

For open-end funds, under normal circumstances, any working day should be able to handle the purchase, conversion, redemption and other businesses for investors. However, when the fund continues to purchase and expand its scale, in order to protect the rights and interests of investors, the fund company can take measures to suspend the subscription conversion business within a certain period of time to control the excessive expansion of the fund scale; Sometimes, fund companies may also take measures to suspend redemption.

During the working days during this period, the fund is closed, that is, the subscription, conversion and redemption business are suspended.

The fund open day is the working day for investors to handle a series of businesses such as account opening, subscription, redemption, account cancellation, loss reporting and transfer. The fund open day is the trading day when the fund allows subscription, redemption, conversion or fixed investment. Trading in the open period of the fund can only be conducted during the trading hours of the fund trading day. Open days of open-end funds in China are trading days of Shanghai Stock Exchange and Shenzhen Stock Exchange, and the processing time is 9:00- 15:00.

Open-end fund, also known as * * * mutual 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 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 is a main type of mutual fund, which is isomorphic with closed-end fund and forms two fund operation modes.

Open-end fund is one of the basic forms of fund operation in the world. Fund management companies can sell new fund shares to investors at any time, and also need to buy back their own fund shares at any time according to the requirements of investors.