而且往往是大规律形成后,新规律是反的。
比如大盘99 年到09年,十年就是基本上横盘。
09年到19年,没有大回调的超级牛市. TQQQ probably 100x in 10 years without volatility decay
19年到现在,反复的大回调, TQQQ volatility decay is a hugh thing.
So if you find some patterns work well in the past, not only it may not work that well in the future, but the future pattern could be totally opposite.