From Liz Ann latest twitt
This is an interesting pair of stats courtesy of my friends at
: using S&P 500 tracking ETF (SPY) as a proxy for U.S. stock market dating back to its 1993 inception, they looked at how an investor would have done only owning market on day after "up days" versus only owning market on day after "down days” … hypothetical strategy is pretty simple to calculate (but NOT replicable without factoring in trading costs); as shown in chart, over past 40 years, only owning SPY on trading days immediately following down days for SPY, you'd be up 785%; conversely, only owning SPY on trading days immediately following up days for SPY, you'd be up a measly 16.7%
我無法複製/貼上圖表,但你仍然應該明白她文字中所說的內容。
從本質上講,你只在 SPY 下跌的那一天進行投資,你就獲得更多。 我們可以把意思延伸到,當市場下跌 X% 時投入固定投資。 當市場已經大幅下跌時,就像美國人喜歡說的那樣,"Back Up Your Truck" as recently as in 2020 or 2022。
X%由您的風險承受能力和您的現金儲備水準決定。