When setting the fixed investment of the fund, you will be asked to choose monthly or quarterly, and then agree on a deduction date. If June 18 is selected, the deduction will be made according to the monthly or quarterly 18 you set, and it will be postponed on non-trading days.

If you want to control yourself and keep changing the date, I don't think it will work. This requires you to constantly modify the fund's fixed investment contract and change the date of deduction, and you can't predict which day it will rise and which day it will fall.

If you want to buy first, you can directly invest in cash instead of the purchase date agreed in the contract.

Fixed investment is to invest in a fund with fluctuations. If there is no fluctuating fund, there is no need to make a fixed investment. The advantage of fixed investment is to balance costs.

Recommend several funds: Bank of Communications Steady, China Merchants Pioneer, China Shipping Bonus, and Shanghai Investment Pioneer (remember: the fixed investment must be converted from dividends to investment)