1, fund classification b: invest the assets of share A and share B as a whole, in which the holder of share B pays the agreed interest to the holder of share A every year, and the overall investment profit and loss will be borne by share B after paying the interest ... When the overall net value of the parent fund falls, the net value of share B falls first; Accordingly, when the overall net value of the parent fund rises, the net value of the B share will appreciate faster after providing the A share income. Share B usually gains certain leverage by participating in the distribution of residual income or taking losses to a greater extent, which has a more complicated internal capital structure and its nonlinear income characteristics make it imply options.

2. The sum of the product of the net value of each sub-fund of the graded fund and the share ratio is equal to the net value of the parent fund. For example, the net value of the parent fund split into two types of shares = the net value of class A sub-base X A share%+the net value of class B sub-base X B share%. If the parent fund is not split, it is a general fund.