The basic concept of rate refers to the proportion of expenses that investors need to pay when purchasing fund shares. Investors buy different funds, and the subscription rate may be different due to the size of the subscription amount.

Here, calculate the maximum rate. The subscription amount of open-end funds actually includes subscription fee and net subscription amount, and the subscription fee can be calculated according to a certain proportion of subscription amount or net subscription amount.

Subscription fee = net subscription amount × applicable subscription rate, net subscription amount = subscription amount-subscription fee subscription amount = net subscription amount/net value of fund unit on the subscription day.