The interest of Yu 'ebao will fluctuate because its interest is linked to the market. Yu 'ebao is actually a monetary fund, and its interest is related to the assets invested by the fund. Under normal circumstances, the seven-day annualized rate of return of Yu 'ebao fluctuates between 2.0% and 3.0%.

To calculate the interest of Yu 'ebao for one day, you can use the following formula:

Interest = balance treasure amount × (7-day annualized rate of return ÷365)

It should be noted that the interest of Yu 'ebao is not fixed and will change with the market environment and the investment strategy of the fund. Therefore, the specific amount of interest may vary from day to day.

Take the 7-day annualized rate of return of 2.5% as an example. If you deposit 10000 yuan in the balance book, the interest for one day is about:

10000 Yuan× (2.5% ÷ 365) ≈ 0.685 Yuan

This calculation result is for reference only, and the actual interest may be different due to the change of the 7-day annualized rate of return of Yu 'ebao and the market environment.