_OF is an OTC fund, and LOF is an OTC fund. _OF is more troublesome to trade.

funds are divided into broad sense and narrow sense. In broad sense, they refer to a certain amount of funds set up for a certain purpose, such as trust and investment funds, provident funds, retirement funds, etc. In narrow sense, they refer to funds with specific purposes and uses. Usually, funds mainly refer to securities investment funds. The income of securities investment funds comes from the future, and the performance of income is closely related to the performance of the underlying market of investment targets, which has certain risks.