What are the external deduction methods and internal deduction methods in fund subscription and subscription?

Hello, "external deduction method" and "internal deduction method" are both calculation methods for calculating fund subscription fee and subscription share, and their calculation formulas are different. At present, extrapolation is widely used.

The specific calculation formula of "external deduction method" is as follows: net subscription amount = subscription amount /( 1+ subscription rate); Subscription fee = subscription amount-net subscription amount; Subscription share = net subscription amount/net fund share on the subscription day. At present, the funds in the market basically adopt the calculation method of external deduction.

The calculation formula of "internal deduction method" is: subscription fee = subscription amount × subscription rate; Net subscription amount = subscription amount-subscription fee; Subscription share = net subscription amount on T day/net fund share ".