少写了几个字，可能有误解。

Geometric average equals arithmetic average only if  the return rate is zero throughout the entire period (or the account value holds constant).  For all other scenarios, geometric average necessarily is lower than arithmetic average.   

所有跟帖： 

• only if the return rate is CONSTANT.... -slow_quick- ♂ (78 bytes) () 12/31/2023 postreply 18:20:17

• 几何平均是10%，算术平均是10.5% -BullishSolar- ♂ (0 bytes) () 12/31/2023 postreply 18:23:24

• 您别生气哈，这两个回报率怎么算其实主帖里都有。。。 -slow_quick- ♂ (45 bytes) () 12/31/2023 postreply 19:25:28

• 仔细看了看，才知道“平均年回报率“是什么意思。 -BullishSolar- ♂ (0 bytes) () 12/31/2023 postreply 19:41:54

• 你是对的，是我一边想return, 一边想principal (value). 结果混起来了。 -Francine- ♀ (0 bytes) () 12/31/2023 postreply 18:29:51

• 还一边看PACKERS VS VIKINGS. -Francine- ♀ (0 bytes) () 12/31/2023 postreply 18:34:27

• 哈哈，这才是人生 -slow_quick- ♂ (0 bytes) () 12/31/2023 postreply 19:15:35