如果算年回报率,需要一月一号投入,然后十二月31号股市关闭后计算。
每月定投的年回报率比较复杂,可以参考fool.com的两个公式:
https://www.fool.com/investing/how-to-calculate/monthly-return-on-investment/#:~:text=If%20you%20want%20to%20know,then%20subtract%201%20back%20out.