The COVID-19 crisis highlights a golden rule of investing 

It’s a golden rule of investing, and the spread of COVID-19 illustrates its importance, especially as I don’t think markets are close to bottom yet.

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.

Pity the individual who chose to begin their investment journey a few weeks ago. Especially pity them if they had a big lump sum and invested it all. 

Don’t get me wrong, I’m sure the markets will recover, eventually. But this situation does illustrate a golden rule of investing — never throw all your money at the stock market in one go.

Actually, on thinking about it, I would not pity an investor who has just begun their investment journey if they had followed this rule — I would envy them.  

The markets have further to fall

Already we have seen a share rout, followed by a mini recovery, and then further falls. The mini recovery saw many conclude that shares had hit bottom, that ‘now was a time to buy.’

Such false dawns are common occurrences during stock market crises. The infamous 1929 crash saw many short-lived recoveries which tempted shareholders back in.

COVID-19 is spreading exponentially. It makes most of us nervous about our own health and the health of loved ones — is that a seasonal cold, or the dreaded virus? We wouldn’t be human if those thoughts didn’t cross our minds every time there’s a sneeze. 

I believe the markets are underestimating the likely spread of the virus and its economic impact. They always are lousy at judging something that changes exponentially. Maybe it’s in our genes — Ray Kurzweil, the famous futurologist and Google’s Director of Engineering has said that our evolutionary past means we have no instinctive understanding of exponential — we might get it intellectually, but not in our gut. 

As the virus spreads, we will change our behaviour, employers may eventually become more nervous about workers spreading the virus than about lost production, and markets will fall a lot further.

As for predicting the recovery, getting the timing right is nigh on impossible.

Diversify over time

That is why diversification over time is so important. If you plough all your money into stocks in one go, you risk timing your investment with stock market falls. 

Sure, if you sit tight you will probably regain your money eventually, but you can do better.

If, instead, you drip feed your money into the market — say once a month for three years, or once every three months, you are limiting the risk while increasing the chances that that you will benefit from a recovery.

Three different situations, same response

Let’s say that you were savvy enough to have liquidated your portfolio at market peak, you have a lump sum for some other reason, or you invest a proportion of your income every month.

I would say spread out your investment over three years. If you invest a proportion of your income every month, then relax, you are following that strategy by default.

Follow that approach and just as investment losses occur on the falls, profits will accrue on the rises. 

Views expressed in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Young Caucasian man making doubtful face at camera
Investing Articles

Time to start preparing for a stock market crash?

2025's been an uneven year on stock markets. This writer is not trying to time the next stock market crash…

Read more »

Santa Clara offices of NVIDIA
Investing Articles

Nvidia stock’s had a great 2025. Can it keep going?

Christopher Ruane sees an argument for Nvidia stock's positive momentum to continue -- and another for the share price to…

Read more »

Close-up of a woman holding modern polymer ten, twenty and fifty pound notes.
Investing Articles

£20,000 in savings? Here’s how someone could aim to turn that into a £10,958 annual second income!

Earning a second income doesn't necessarily mean doing more work. Christopher Ruane highlights one long-term approach based on owning dividend…

Read more »

Road 2025 to 2032 new year direction concept
Investing Articles

My favourite FTSE value stock falls another 6% on today’s results – should I buy more?

Harvey Jones highlights a FTSE 100 value stock that he used to consider boring, but has been surprisingly volatile lately.…

Read more »

UK supporters with flag
Investing Articles

See what £10,000 invested in the FTSE 100 at the start of 2025 is worth today…

Harvey Jones is thrilled by the stunning performance of the FTSE 100, but says he's having a lot more fun…

Read more »

Investing Articles

Prediction: here’s where the latest forecasts show the Vodafone share price going next

With the Vodafone turnaround strategy progressing, strong cash flow forecasts could be the key share price driver for the next…

Read more »

Front view of a young couple walking down terraced Street in Whitley Bay in the north-east of England they are heading into the town centre and deciding which shops to go to they are also holding hands and carrying bags over their shoulders.
Investing Articles

How much do you need in a SIPP or ISA to aim for a £2,500 monthly pension income?

Harvey Jones says many investors overlook the value of a SIPP in building a second income for later life, and…

Read more »

Friends at the bay near the village of Diabaig on the side of Loch Torridon in Wester Ross, Scotland. They are taking a break from their bike ride to relax and chat. They are laughing together.
Investing Articles

Can you turn your Stocks and Shares ISA into a lean, mean passive income machine?

Harvey Jones shows investors how they can use their Stocks and Shares ISA to generate high, rising and reliable dividends…

Read more »