Net fund value = rate of change of P/E ratio+rate of change of yield+dividends when investing.

From the formula, we can see the change rate of P/E ratio, that is, the investor's mood will affect the change of fund net value; The profitability of the company will also affect the changes in the net value of the fund.

Therefore, the value of the fund's net value cannot be maintained at a number, either decreasing or increasing.