It should be noted that if investors buy funds in bulk, they will sell the funds in accordance with the principle of first-in first-out, and calculate the holding days.
For example, investors buy 1 000 fund when the net value of No.8 fund is1yuan, buy 1000 fund again when the net value of No.6 fund is 1.5 on the 5th, and redeem 100 when the net value of No.20 fund is 1.8 yuan. Then 1.5 million funds include 1.5 million funds bought on the 8th and 500 funds bought on the 6th. The charging standard for redemption of this fund is: if it is held for less than 7 days, it will be charged according to the standard of 1.5%; If the holding days are less than 30 days and more than or equal to 7 days, it will be charged according to the standard of 0.75%.
Then the redemption fee for investors to redeem 1500 funds =1000x1.8× 0.75%+500x1.8×1.5% = 27 yuan; Net income =1000× (1.8-1)+500× (1.8-1.5) = 950 yuan.