Stock market crash: I’ll watch these 5 warning signs while buying cheap shares!

While investors worry about a stock market crash, I keep a close eye on these five warning lights. So far, they haven’t stopped me buying cheap UK shares!

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.

The past two weeks have seen increased volatility in UK shares and US stocks. Since 15 February, the FTSE 100 has dropped by more than 4%, before bouncing back to 6,660 points today. Meanwhile, fears of a US tech bubble have knocked 200 points off the S&P 500 since its record high on 16 February. What’s going on? And should I pay attention to fears of a coming stock market crash?

Stock market crash: I watch these five warning lights

1. UK and US bond yields

Since early 2021, UK and US government bond prices have been sliding, driving up bond yields. Since higher bond yields point to higher inflation and increased borrowing costs, this has unnerved equity investors. Today, the benchmark 10-year Treasury yield peaked at 1.624%, its highest level in a year. Likewise, the 10-year UK Gilt yield is 0.783%, the highest since March 2020’s market meltdown. Thus, UK investors worried about a stock market crash should keep a close eye on bond yields. Any further weakness in bond prices could spell bad news for share prices.

2. UK and US inflation

Bond prices are falling and yields rising because investors worry about inflation. If rising consumer prices lift inflation too much, then the US Federal Reserve and the UK Bank of England may need to raise interest rates. However, if any inflation surge above the 2% target proves temporary, then interest rates should stay at rock bottom. Again, investors worried about the risks of a stock market crash should watch inflation levels like a hawk.

3. The oil price

As the global economy undergoes a post-Covid-19 bounce, demand for oil should also rebound. Yesterday, the OPEC cartel and its allies voted to freeze oil output at current levels. An unchanged oil supply pushed up the price of Brent crude by 3% to $68.74 a barrel today. Furthermore, the Brent crude price is up more than a third (37%) in 12 months. Obviously, higher oil prices feed directly into inflation, so I routinely monitor the price of ‘black gold’. Meanwhile, investors looking to profit from higher oil prices could check out the very generous cash dividends on offer at British supermajors Royal Dutch Shell and BP.

4. GDP growth

Economists are universally optimistic that economic growth will surge worldwide as the Covid-19 threat recedes. For example, Beijing expects China’s economy to grow by more than 6% in 2021. With another round of US stimulus spending on the horizon, the American economy could also come roaring back. But accelerated economic growth can trigger higher pay rises, feeding into consumer prices and lifting inflation. Thus, while I worry about a stock market crash, I’ll keep my eye on GDP (gross domestic product) growth in the US, UK, and other large economies.

5. Warren Buffett is worried about bonds

Warren Buffett, the billionaire Oracle of Omaha, appears more worried about a bond bubble than a stock market crash. Buffett recently warned, “Bonds are not the place to be these days”. But higher interest rates reduce the present value of future corporate cash flows. In this scenario, worst hit might be highly valued US tech stocks. Of course, I agree with ‘Uncle Warren’, which is why I favour cheap UK shares paying huge cash dividends! Indeed, I see the UK’s FTSE 100 as offering some of the best deals in years for value investors like me. That’s why I’ll keep buying UK shares for now!

Cliffdarcy 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 »