We have some exciting news to share! The Motley Fool UK has now become an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. We’ll be introducing a new name and brand over the coming weeks — we're very excited to share it with you and embark on this new chapter together!

3 warning signs I’m watching for to predict another stock market crash

By looking at signs such as bond yields and price-to-earnings ratios, Jonathan Smith tries to see whether another stock market crash is heading his way.

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.

It’s almost a year to the day when we hit the bottom of the 2020 stock market crash. It’s easy to look back with the benefit of hindsight, a year on. At the time, nobody knew whether the FTSE 100 was going to fall another 10% or even more. Will it happen again? Although the stock market crash caught some by surprise, there are some warning signs that I can look at to try and gauge if another stock market crash is on the way. 

Valuations and debt levels

The valuation of a company is one sign. Now, I can’t just look at one company and say that due to the price-to-earnings ratio, the entire stock market could crash. But I can look at the average ratio across the FTSE All Share index and get a good idea. At the moment, the FTSE All Share average P/E ratio is around 21. The average over the past 10 years is around 17. If the ratio gets very high, it leads me to conclude that the market is overvalued and could be due a correction.

It does look like valuations are above average at the moment, but not drastically enough to suggest a 25% stock market crash to bring about a fair rebalancing. And of course, while this warning sign of high P/E ratios is useful, it doesn’t account for surprise events such as a global pandemic. Last year, valuations didn’t look stretched, but we still saw a market crash.

Another warning sign is the amount of debt the companies have. If I’m looking at one company, I can use the debt-to-equity ratio. For the whole market, it’s a little harder to get an accurate figure. So this sign is one I need to look out for as I’m researching individual companies. I’ve seen a lot of FTSE 100 companies increase debt over the past year due to the pandemic. But that was unavoidable for many. 

Higher debt levels means more constraints for businesses, as they need to pay back the lender (with interest). If these levels get out of control, a company could go bust.

Market crash warning signs, but not flashing right now

As someone who buys stocks, it might not seen too logical to spend time looking at the bond markets. But bond yields give me a good indication about the future direction of stocks. Higher yields mean investors think interest rates will rise. 

So a warning sign for me is the rising yields that we’ve started to see in the UK. If they continue to rise, I think we could see a crash in some form. Higher rates ultimately mean a higher cost of borrowing for corporates.

None of the above signs are out of control, so I don’t see a stock market crash happening in the near future.

As a result, I’ll continue to stick to buying stocks that I believe have good long-term potential. Even with a crash, a good quality company should be able to ride it out in the long run. In fact, by investing small amounts regularly, I’ll be able to bring my average buying price lower if we do see a crash.

Until more of the warning signs start flashing red, I feel comfortable continuing on my investing strategy.

jonathansmith1 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

Businessman with tablet, waiting at the train station platform
Dividend Shares

After years of pain, is the Diageo share price looking up?

For almost five years, the Diageo share price has delivered nothing but pain to long-suffering shareholders. But I see early…

Read more »

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

Should I dump Duolingo from my ISA and buy Palantir stock instead?

These two AI-powered software stocks have been heading in very different directions, making me wonder if I should sell one…

Read more »

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

Warren Buffett just sounded an alarm to the stock market

Last week Warren Buffett used a six-letter word that should give investors pause for thought. But is the Oracle of…

Read more »

Investing Articles

Here are the lazy passive income streams paying me while I sleep

Find out which passive income stocks this writer owns, as well as one from the FTSE 100 index that he's…

Read more »

View of Lake District. English countryside with fields in the foreground and a lake and hills behind.
Investing Articles

How much do you need in an ISA to aim for a £2,613 monthly second income

Harvey Jones explains how a spread of FTSE 100 shares held in an ISA could generate enough second income to…

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

9 dividend-paying FTSE 100 shares to target a huge ISA retirement income!

Royston Wild explains how a diversified portfolio of FTSE 100 shares can deliver a strong (and growing) passive income in…

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

£20,000 in an ISA? This passive income stock could give you £3,271 in dividends in 2025 and 2026

This passive income stock carries yields of 7.8% for 2026 and 7.9% for next year. So what makes it one…

Read more »

happy senior couple using a laptop in their living room to look at their financial budgets
Investing Articles

Plan to fund your retirement with just the State Pension? Good luck with that!

The UK's State Pension is ranked as one of the worst among the world's developed economies. Consider this alternative to…

Read more »