Fixed investment in the fund means that the bank regularly deducts a certain amount from the fund account of the purchaser every month according to the fund agreement, and purchases the fund on his behalf. The starting point ranges from 300 to 500. If the balance in the buyer's account is insufficient, the bank can't deduct money, which is essentially the money owed by the buyer to the fund company, and the bank has no right or obligation to overdraw the account. At most, it is recovered after the account has sufficient funds. If the funds in the long-term account are insufficient, the fixed investment agreement of the fund is invalid.
The security guard didn't make it clear, not that buying a fund is just a fixed investment. Fixed investment is designed for many monthly salaries, because their monthly income is relatively balanced and will not fluctuate too much. A common way to buy a fund is to buy a part of the fund at a time of sexual intercourse 1000 or more, and then it depends on whether the individual has made additional investment.
My advice to you is: invest in the fund when the funds on hand are above 1000. In addition, it is more important to charge yourself first and learn some knowledge in this field, otherwise it is easy to suffer.