Graded fund refers to the classification of fund products into Class A and Class B, and then different income distribution is given respectively. Graded fund discount refers to the convenience of calculating the net value of the fund, and at the same time, the investors' income will be cashed on time to avoid operational difficulties caused by excessive expansion of the fund assets. At this time, the foundation will change regularly or irregularly.

The discount principle of graded funds is to set the discount clause first. When Grade B falls to a certain extent, the grading foundation will be discounted as a whole. After the discount, the net asset value will remain unchanged, but the relative investor account share will decrease. In this way, the ratio of Class A and Class B remains unchanged, and the leverage of funds returns to the initial state.