The rise and fall of the fund is expressed as a percentage, which is actually the so-called "period rate of return".
Period yield% = (final value-initial value)/initial value
The final value of the general fund's rate of return is the net value of the fund after the close, or the latest net value at present. The initial value is the net value of the fund in the previous trading day. For example, if today's net value is 1.5 and yesterday's net value is 1.4, then the rate of return = (1.5-1.4)/1.4 = 7.14%.
Seeing the percentage of the rate of return, we can distinguish the cycle of this rate of return. If you look at the daily net update, the yield is compared with the previous trading day. Some yields are marked, such as recent 1 month, recent 3 months, a certain year, etc. At this time, the final value and initial value have changed.