The FTSE 100 slump continues, so what do I think Foolish investors should do?

Here’s why Foolish investors shouldn’t care what the FTSE 100 (INDEXFTSE: UKX) is doing this week.

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.

So we’re just getting over the worldwide stock market slump, which saw the FTSE 100 lose nearly 7% of its value in the first 12 days of October.

Then, after a week of calm, we’re now subjected to headlines proclaiming “FTSE 100 slides to seven-month low,” and telling of £240bn being wiped off the value of Footsie stocks since May.

But was everyone shouting about the hundreds of billion previously added to the Footsie to get it up to those record levels? No, because it’s scare headlines that attract eyeballs, and nobody wants to read “Everything is just fine” stories.

Gone where?

A friend once asked me where all the money has gone whenever we hear of how much has been wiped off the stock market. But very little has actually gone anywhere.

The £240bn “gone since May” is simply the difference between the cash that would have been raised had every share in every company on the FTSE 100 been sold at May’s prices, and the amount the same theoretical exercise would raise today.

But only a small proportion of the entire FTSE has actually been bought and sold. And of those who sold, many will have been holding for a lot longer, and will have made nice long-term profits, regardless of the latest “seven-month low“, or whatever.

No losses

It’s often said that until you actually sell your shares, you haven’t gained or lost a penny (except for any dividends you’ve earned). That’s true, and bearing it in mind can help you avoid the worries about short-term price falls. Just don’t take it as literally as someone I once knew did.

On the grounds that he hadn’t made a gain or loss until he sold, he never sold losing shares and only ever sold winning ones. And as he only accounted for profit and loss when he sold, he always reckoned he was nicely ahead, while slowly accumulating a pile of worthless dross in his portfolio.

Why the fall?

Among other reasons, pundits seem to be putting it down to global political and economic uncertainty. The threat of a global trade war has been raised by a number of commentators, and the daily-claimed reversals on Brexit negotiations are being touted as a big worry, too… I read a headline yesterday that said a Brexit deal is 95% done, and today a rebuttal claiming it’s 0% done.

The murder of Jamal Khashoggi at a Saudi consulate in Turkey is one of the latest market-shaking events, though can you really see governments and defence firms shunning billions in arms profits for moral reasons?

Oh, and a budget dispute between Italy and the rest of the EU is also raising its head this week.

So what’s new?

But here’s a question. Can you ever remember a time when the world wasn’t awash with political and economic uncertainty? It’s certainly never happened in my lifetime.

The 20th century encompassed two world wars, the great crash of 1929, the 1970s oil crisis, the Cold War, and plenty more. But shares in the world’s major stockmarkets still wiped the floor with other forms of investment.

I reckon we should welcome short-term downturns, and use the opportunities to buy great shares at even better prices.

Views expressed 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

Close-up of British bank notes
Investing Articles

£9,000 in savings? Here’s how to try and turn that into a £193 monthly second income

With a long-term approach and applying basic principles of good investment, our writer reckons someone with under £10k could earn…

Read more »

Investing Articles

A 2026 stock market crash could be a rare passive income opportunity

If a stock market crash comes our way then it might throw up plentiful opportunities for investors to secure a…

Read more »

Tesla car at super charger station
Investing Articles

£10,000 invested in Tesla stock 1 year ago is now worth…

Dr James Fox takes a closer look at Tesla stock with the incredibly volatile mega-cap company surging and pulling back…

Read more »

British pound data
Investing Articles

My personal warning for anyone tempted by the plunging Aston Martin share price

Harvey Jones was so captivated by the plunging Aston Martin share price that he ignored an old piece of investment…

Read more »

Stacks of coins
Investing Articles

This penny share just crashed 13% to 19p! Time to buy?

After another fall today, this penny stock has now crashed 70% since April 2021. Is it one that should be…

Read more »

Trader on video call from his home office
Investing Articles

Down 19%! Here’s why Barclays shares look a serious bargain to me right now

Barclays shares have slumped recently, but a big gap between price and fair value has opened, offering nimble long-term investors…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Why Meta Platforms shares fell 12.5% in March

Historically, investors have done well by buying Meta Platforms shares when the price has fallen. But is the latest legal…

Read more »

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

£20,000 invested in BAE Systems shares 4 years ago is now worth…

BAE Systems' shares have soared since 2022, yet rising NATO budgets are just starting to feed through, so the real…

Read more »