Forget a cash ISA: a stock market crash could be a FTSE 100 buying opportunity

The FTSE 100 (INDEXFTSE: UKX) could offer stronger return potential than a cash ISA.

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.

With the FTSE 100 having declined by over 10% in the last five months, it is understandable that many investors are feeling nervous about their portfolios. After all, they are likely to be valued at a lower level than they were earlier this year, and there is the potential for recent declines to continue.

Increased uncertainty could mean that many investors become somewhat fearful regarding their investment portfolios. This could lead them to determine that a cash ISA may be a better place to invest. It offers stable returns which, in recent months, have outperformed the FTSE 100. In the long run, though, investing in a cash ISA rather than shares could prove to be the wrong move.

Real returns

Although cash ISAs may outperform shares over short-term periods where the latter experiences declines, the reality is that inflation remains above the return on a cash ISA. This means that over time, the real-terms value of any investment in a cash ISA is likely to fall. As a result, having too much wealth invested in one over the long term could be detrimental to an individual’s standard of living, since it will be unable to maintain its spending power.

The FTSE 100, on the other hand, has a long track record of beating inflation. It has the potential to deliver high single-digit total returns, while a dividend yield in excess of 4% suggests that its income return alone is likely to beat inflation during normal market conditions.

Bear market

Although the FTSE 100 is still some way off bear market territory, it would not be a major surprise for the index to fall by another 10%. There are significant risks facing the world economy, such as tariffs, Brexit and rising US interest rates. They could impact negatively on investor sentiment and cause share prices to decline yet further. In such a scenario, cash ISAs may outperform stocks over a period of months.

In the long run though, a bear market could be a buying opportunity for investors. High-quality companies may end up trading at lower valuations, which could provide wider margins of safety. This could lead to higher return potential, as well as lower risk, for investors who are looking five or 10 years ahead. As such, if the FTSE 100 does experience further volatility, it may be the right time to dump a cash ISA, rather than invest more capital into it.

Outlook

As mentioned, recent stock market volatility could continue. However, this is nothing new for the index. The FTSE 100 has always been relatively volatile, and it has always followed a cycle of ups and downs. Focusing on company valuations could be a sound means of judging when the rises and falls provide the greatest opportunities for investors. Although cash ISAs may offer less risk in the short run, in the long run they seem to offer little return appeal versus the FTSE 100.

Peter Stephens has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned 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

Investing Articles

Is 2026 the year the Diageo share price bounces back?

Will next year be the start of a turnaround for the Diageo share price? Stephen Wright looks at a key…

Read more »

Investing Articles

Here’s my top FTSE 250 pick for 2026

UK investors looking for under-the-radar opportunities should check out the FTSE 250. And 2026 could be an exciting year for…

Read more »

Yellow number one sitting on blue background
Investing Articles

Here’s my number 1 passive income stock for 2026

Stephen Wright thinks a 5.5% dividend yield from a company with a strong competitive advantage is something passive income investors…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

Should I sell my Scottish Mortgage shares in 2026?

After a strong run for Scottish Mortgage shares, our writer wonders if he should offload them to bank profits in…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Down 35%! These 2 blue-chips are 2025’s big losers. But are they the best shares to buy in 2026?

Harvey Jones reckons he's found two of the best shares to buy for the year ahead, but he also acknowledges…

Read more »

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

State Pension worries? 3 investment trusts to target a £2.6m retirement fund

Royston Wild isn't worried about possible State Pension changes. Here he identifies three investment trusts to target a multi-million-pound portfolio.

Read more »

Smiling white woman holding iPhone with Airpods in ear
Dividend Shares

4 dirt-cheap dividend stocks to consider for 2026!

Discover four great dividend stocks that could deliver long-term passive income -- and why our writer Royston Wild thinks they’re…

Read more »

Young mixed-race woman jumping for joy in a park with confetti falling around her
Investing Articles

These fabulous 5 UK stocks doubled in 2025 – can they do it again next year?

These five UK stocks have more than doubled investors' money as the FTSE 100 surges. Harvey Jones wonders if they…

Read more »