the classification of money funds is mainly to realize classified charging for large customers and general customers. As there is no transaction fee for money market funds, the manager will charge a sales service fee at a certain proportion of the purchase amount. Charging a service fee of .1% for large customers, that is, customers with a share of 5 million or more, is called a class B share, and charging a service fee of .25% for ordinary customers (below 5 million) is called a class A share. Since the fund income is calculated after the service fee is withdrawn, there will be two income indicators.