Revealed: the number one mistake investors repeatedly make

Are you making this costly mistake?

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

Investing isn’t a science. There’s no guaranteed get-rich-quick formula that can make you a millionaire overnight and any stock promoter who tries to sell you a trading strategy that guarantees profits is almost certainly lying. Indeed, even the world’s most experienced investors and money managers don’t guarantee profits as it’s just impossible to predict the market’s movements. 

But despite the fact that it’s beyond tough to know how the market will behave, investors continue to think that they know best. The simple fact of the matter is that this is investors’ biggest mistake. 

The biggest mistake

The stock market is driven by human emotion. Therefore it tends to be highly irrational. Trying to predict the market’s movements is a fool’s folly and trying to outperform by timing the market is just as useless. 

Many different academic studies back up these statements. Investment fund powerhouse Davis Advisors looked at the annualised returns of equity investors (based on returns of the S&P 500 index) over the 20-year period from 1994 to 2013. During this time, the market saw two major bull and bear markets, which would have produced very different reactions from investors. 

To model these reactions Davis’s analysts compared to the returns of five different investor groups over the period studied. They were those who remained invested over the entire period; those who missed just the best 10 trading days; those who missed the best 30 trading days of the study period; and those who missed the best 60 or 90 trading days. 

The difference in returns for these five groups is extremely revealing. The investor that stayed fully invested and rode out the turbulence achieved an average annual gain of 9.2%. However, the investors who missed the 10 best trading days or more saw compound average annual returns of only 5.5% or less.  

Another study, this time conducted by consulting firm Dalbar found that since 1984, the average US equity fund investor has lagged the market by an average of 7.3% per annum thanks to attempts to time the market. 

Put simply, the above figures show that timing the market (or trying to) is just a complete waste of time, effort and money. Missed opportunities and extra trading/tax costs add up over time. 

The bottom line 

For the average investor, trying to trade around the market, or using a trading strategy to try and beat the market, is a waste of time. Granted, some investors have the experience to cope with this style of dealing, but they’ve usually learned the hard way. 

If you’re looking to preserve your capital, and invest with minimum effort, buy-and-hold investing is the best way to go. For investors who have even less time, index investing may be the best strategy. 

If multiple studies have show that the average investor can’t beat the market, it makes no sense to try, especially when there’s such an easy alternative available. 

Rupert Hargreaves has no position in any shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Young Black woman using a debit card at an ATM to withdraw money
Investing Articles

Meet the FTSE 100’s newest bank stock

This FTSE 250 stock has skyrocketed nearly 900% over the past 60 months, earning it a place in the prestigious…

Read more »

Investing Articles

See what £10,000 invested in Shell shares 1 month ago is worth now

Harvey Jones looks at how Shell shares have fared over the past month and more importantly, what the long-term outlook…

Read more »

Finger clicking a button marked 'Buy' on a keyboard
Growth Shares

At its lowest level since July, here’s why I think the IAG share price is dead cheap

Jon Smith explains why the IAG share price has fallen over the past week but talks through the reasons why…

Read more »

Picture of an easyJet plane taking off.
Investing Articles

Will the easyJet share price rise 43% or 97% by this time next year?

City analysts believe easyJet's share price might almost double over the next year. Royston Wild considers the outlook for the…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

More great news for Rolls-Royce shares!

Rolls-Royce shares got a boost this week after some intriguing developments in the process of creating Europe's new fighter aircraft.

Read more »

Arrow symbol glowing amid black arrow symbols on black background.
Investing Articles

Persimmon’s share price surges 7% on double boost! Can it keep rising?

Persimmon's share price is surging, up 11% at one point earlier on Tuesday. Could this be the start of a…

Read more »

This way, That way, The other way - pointing in different directions
Investing Articles

What on earth’s happening to the Greggs share price?

Harvey Jones says Greggs’ share price has shown surprising resilience in the recent stock market turmoil, but the FTSE 250…

Read more »

Mature black woman at home texting on her cell phone while sitting on the couch
Investing Articles

Barclays shares are down 18%. Time to consider buying?

Barclays’ shares have plummeted in recent weeks. Edward Sheldon looks at what’s going on and provides his view on the…

Read more »