The monthly deduction time for the fixed fund investment is determined by you when you handle the fixed fund investment business. Generally divided into the beginning \ end of each month. If the business is set at the beginning of each month, the deduction will be made on the first working day of each month, based on the net value of the fund on the day of deduction. If you decide to invest in 500 yuan every month, the net fund value at the end of the effective working day in that month is 0.80 yuan. If it is a back-end charge, then your fixed investment share of the fund in that month is 625. (At the same time, you should know whether you charge front-end fees or back-end fees, because different charging methods will also affect the share, which is also determined when you go through the formalities of purchasing funds. In addition, the subscription and redemption fees of each fund are different, and the prescribed fee-free period is also different. Therefore, the most important thing is to see what fund you buy.