How much money a fund of 100 yuan can earn a day depends on the rate of return of the fund. For example, if you buy a stock fund, the subscription amount is 100 yuan, and the market of the fund is relatively good, with an increase of 4% that day, then the money you can earn in one day is 100*4%=4 yuan.

If the increase of the fund is relatively small, only 2%, then the money you can earn in a day is 100*2%=2 yuan, so how much you earn in a day depends on the increase. The better the increase, the more money you earn. The lower the increase, the less money you earn.

Extended data:

Can the fund 100 earn one yuan a day?

The fund 100 can earn one yuan a day, but the increase of the fund must be above 1% to earn one yuan. If the increase is not below 1%, you will not earn a dollar, and if there is negative income, you will lose money.

However, 100 yuan is not too much. You can use it to accumulate experience when buying funds. Basically, you can't make a lot of money, because the income of the fund will also be related to the principal. The principal of 100 is a little low, and it is basically difficult to make big money.