By Eric T. Ludwig CFP®
Published 4/8/2020
QUESTIONS:
- When does the stock market move the most: when it’s opened, or closed?
- During the pandemic crash, how have stocks performed during the day vs overnight?
- Do dividends make a difference to stock market performance?
As stocks started dropping in mid-February and the bottom fell out in March, something really started to bother me: why did it seem like all the market moves were happening overnight? I’d wake up in the morning and check the futures market, and the stock market would already be down 5%…before the opening bell rang!
Was this right? Let’s look:
I analyze the ETF “SPY”, which tracks the S&P 500. (On a side-note, SPY is the oldest ETF, which started trading in 1993).
From January 1st to April 7th of 2020, SPY is down -18% (including dividends, which we’ll come back to).
Now let’s divide the performance into two buckets: the movement during open trading hours, and the movement overnight.
Q1 2020: SPY Performance during:
Trading hours: +10%
Overnight: -25%
Look at those numbers again! This year, if you would’ve woken up and bought the SPY on each market open, then sold it on the each close, you’d be UP 10% for the year! On the other hand, if you would’ve bought the SPY at 3:00 pm each afternoon, then sold it the next morning, you’d be DOWN -25% for the year.
The suspicion was correct: not only is the majority of the market movement taking place when the market is actually CLOSED, stocks were actually creeping up when the market was open. Very strange.
This made me wonder if the phenomenon is some recent “glitch”. Doesn’t all the “news” and trading happen during the day, and therefore move the markets during the day? That would make sense.
Let’s back up a second. If you bought SPY on it’s first trading day on 1/29/1993, as of April 7th, 2020, you’d have a gain of exactly 900%. Get your financial calculator out, and you’ll find that’s a compound annual rate of 8.9%. Pretty sweet!
Now let’s ask, since 1993, what is the daytime performance? In other words, every day you woke up and bought SPY at 8:30 am at market open and sell it every day at 3:00 pm market close. Over the last 27 years, you would be…DOWN -3%! What! Yes, it’s very strange, but true. But the story gets stranger.
We know the buy-and-hold investor clocked in 900%. The own-it-only-during-the-day trader lost -3%. So now we know all the stock market performance happens overnight! That in itself is pretty incredible to me. I guess watching CNBC during the day is more of a waste of time than I realized. Just to repeat…almost all the return in the market is happening overnight.
Pop-quiz: what is the overnight trader’s return? Common sense would be 900% – 3% = 897%. But, that’s incorrect. The overnight trader is up 522%. How could that be = dividends!
1/29/1993 – 4/7/2020: SPY Performance during:
Trading hours: -3%
Overnight: 522%
Yes, dividends! The overnight trader is never receiving dividends because he sells out every morning. The dividends from the S&P 500 since 1993 attribute 378%. The overnight performance is the other 522%. And the daytime performance is -3%. Crazy, but true.
This solidifies 3 points:
- The “news” and “big market moves” during the day, don’t matter as much as we thought, if at all. It’s all about what happens overnight
- While the S&P 500 has risen 900% since 1993, 378% of that return is from dividends…Dividends matter!
- Buying-and-holding gets you all the benefits of the overnight moves AND all the dividends.
Summary:
- The overwhelming majority of the stock market moves take place when the market is closed, not during the normal trading hours.
- For the first 3 months of 2020, the stock market was positive during normal trading hours, and all the losses took place overnight.
- Should we only own the overnight session then? Don’t forget about dividends! Missing out on dividends would mean missing out almost half the S&P 500’s return over time!
*calculations used Yahoo! Finance data. Calculations are the authors. This is not an investment recommendation to buy or sell any investment.