2 warning signs that a stock market crash could be just round the corner

As stocks continue to ride high, Andrew Mackie examines two warning signs that a stock market crash could be about to strike

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.

Businessman looking at a red arrow crashing through the floor

Image source: Getty Images.

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.

Over the last 10 years, equity markets have been riding the crest of a wave — the longest bull market in history. The short-lived recession, induced by the Covid-19 crash, turned out to be a mere blip on this upward trajectory. Central banks came to the rescue by injecting the largest fiscal and monetary stimulus ever seen in the economy. But as the consequences of this loose monetary policy become apparent, we could be on the cusp of a spectacular stock market crash.

Although a black swan event could happen any time, a number of danger signals are already clearly visible. These are my top two.

Rising inflation

Not a day goes by without inflation being talked about in the press. In the US, the latest figures for December put inflation at 7%, the largest yearly rise since 1982. Although the UK figure is not as high (currently at 5.4%) it has been on a similar upward trajectory for some time. The number one contributor to this rise has been soaring oil and gas prices.

A number of economists argue inflation will unwind as supply chains find their feet and economies re-open following Covid. I am not too sure. Indeed, if we are finally seeing the back of the pandemic, supply chain pressures will likely continue for some time.

Further, infrastructure spending in the commodities sector has been in decline for some time. One of the key factors that can attributed to this is the ESG trend. Activist investors and governments have stepped in to prevent oil companies from exploring for new reserves. Although well-intentioned, the reality is that the world needs fossil fuels and will do so for some time as we transition to a green economy. If one looks back in history, whenever oil prices have surged, a recession has never been far away.

Valuations in the US tech sector

By any measure, the US stock market looks overvalued. For me, the primary driver of the asset bubble in the tech sector, and most notably in software companies, has been ultra-easy financial conditions.

The US Federal Reserve has been way behind the curve when it comes to dealing with the threat of inflation. Only recently have they begun to signal their intention to accelerate the tapering of their purchases of financial assets. A number of interest rate rises are now expected. I think we all know what is likely to happen to tech companies, some of which have reached insane valuations, if rates do start rising from here.

The top five companies by market cap in the US – Apple, Alphabet, Tesla, Microsoft, Amazon – are undoubtedly great companies that generate huge profits. But at what point do their valuations become unsustainable? In early 2000, at the peak of the tech bubble, if I had invested in the five largest companies of the day – Microsoft, General Electric, Cisco, Intel, and Exxon Mobil – all of which we can agree are great companies – it would have turned out to be a very bad investment with negative real-returns over the next 10 years.

Today, virtually every tech ETF/fund on the planet is invested in these mega-cap stocks. We have a lot of investors on one side of the boat. The huge imbalances in the economy, that Covid has laid bare, means most could be jumping ship very soon.

Andrew Mackie has no position in any of the shares mentioned

Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. Teresa Kersten, an employee of LinkedIn, a Microsoft subsidiary, is a member of The Motley Fool’s board of directors. John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. The Motley Fool UK has recommended Alphabet (A shares), Amazon, Apple, Microsoft, and Tesla. 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

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Investing Articles

New to investing in the stock market? Here’s how to try to beat the Martin Lewis method!

Martin Lewis is now talking about stock market investing. Index funds are great, but going beyond them can yield amazing…

Read more »

Passive income text with pin graph chart on business table
Investing Articles

This superb passive income star now has a dividend yield of 10.4%!

This standout passive income gem now generates an annual dividend return higher than the ‘magic’ 10% figure, and consensus forecasts…

Read more »

Young woman working at modern office. Technical price graph and indicator, red and green candlestick chart and stock trading computer screen background.
Investing Articles

£5,000 invested in Tesco shares on 1 January 2025 is now worth…

Tesco shares proved a spectacular investment this year, rising 18.3% since New Year's Day. And the FTSE 100 stock isn't…

Read more »

This way, That way, The other way - pointing in different directions
Investing Articles

With 55% earnings growth forecast, here’s where Vodafone’s share price ‘should’ be trading…

Consensus forecasts point to 55% annual earnings growth to 2028. With a strategic shift ongoing, how undervalued is Vodafone’s share…

Read more »

A pastel colored growing graph with rising rocket.
Investing Articles

Here’s how I’m targeting £12,959 a year in my retirement from £20,000 in this ultra-high yielding FTSE 100 income share…

Analysts forecast this high-yield FTSE 100 income share will deliver rising dividends and capital gains, making it a powerful long-term…

Read more »

A senior man using hiking poles, on a hike on a coastal path along the coastline of Cornwall. He is looking away from the camera at the view.
Investing Articles

Is Diageo quietly turning into a top dividend share like British American Tobacco?

Smoking may be dying out but British American Tobacco remains a top dividend share. Harvey Jones wonders if ailing spirits…

Read more »

Young woman holding up three fingers
Investing Articles

Just released: our 3 top income-focused stocks to consider buying in December [PREMIUM PICKS]

Our goal here is to highlight some of our past recommendations that we think are of particular interest today, due…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

Tesco’s share price: is boring brilliant?

Tesco delivers steady profits, dividends, and market share gains. So is its share price undervaluing the resilience of Britain’s biggest…

Read more »