Here’s why the soaring S&P 500 makes me fear a second FTSE 100 crash

The FTSE 100 is still in a slump, but in the US the S&P 500 index is hitting new all-time highs. Here’s why that scares me.

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.

In the USA, the S&P 500 index closed at an all-time high of 3,389.78 points on Tuesday. The NASDAQ hit a record too, and the Dow Jones Industrial Average is within a few percent of one. By contrast, the FTSE 100 is still down close to 20% this year. And at 6,087 points, it’s way below 2018’s all-time high of 7,903.5.

If stock markets genuinely reflected the real long-term earnings of their constituent companies, then we might expect new records to be a regular occurrence. But the real world is volatile, and I find this latest US stock market boom scary. It makes me feel twitchy about our dear Footsie too.

Valuation

The S&P 500 is currently on a P/E multiple of a little over 29. That is, the price of an S&P share on average is 29 times the value of its earnings. The long-term average for that index comes in at around 15 to 16 — an average that’s similar to the FTSE 100.

We’re not looking at forecast earnings here, which we’d expect to raise an index’s apparent valuation in the short term. No, this current S&P 500 valuation is a trailing one, based on reported earnings. So it’s mostly unaffected by the pandemic slowdown yet.

Earnings forecasts are really not very reliable right now. But America is in its worst economic downturn since the Great Depression (as is much of the world). And as more and more weak earnings reports come in, that P/E is going to rise further and further. Unless, of course, there’s a correction in share prices.

Dividends

To look at it another way, we can turn things round and look at dividend yields. That is, the ratio of the average dividend to the average share price. At the moment, the S&P 500 is on a dividend yield of 1.8%. Again, that’s a trailing figure based on reported dividends. And if dividends are cut during the recession, that yield will drop too.

But what does the FTSE 100 look like in similar valuation terms? Well, the Footsie is on a trailing P/E of approximately 16 at the moment. So S&P stocks are valued a full 80% higher than FTSE 100 stocks. And looking at dividends, the FTSE 100 yield stands at around 3.5%. That’s down from last year, even after the index’s fall, but it’s still around twice the S&P 500’s yield. What does this all say to me about the prospects for the FTSE 100?

FTSE 100 set for a fall?

Firstly, I think US stocks are overvalued. They’re high by historic standards, but the Covid-19 havoc makes today’s valuations look like madness to me. I really can see a correction coming. And when the US stock market falls, the rest of the world tends to follow suit. That leads me to rate the probability of a further UK stock market downturn as significant.

But it looks like we have a far wider safety margin with the FTSE 100, as P/E multiples are not going crazy and dividend yields are holding up better than we might have feared. What should UK investors do? I think the secret to successful investing has not changed. If we find shares in top FTSE 100 companies on attractive values, especially ones with a defensive edge, we should carry on as usual and buy for the long term.

Views expressed 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

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

Want to be a hit in the stock market? Here are 3 things super-successful investors do

Dreaming of strong performance when investing in the stock market? Christopher Ruane shares a trio of approaches used by some…

Read more »

Two white male workmen working on site at an oil rig
Investing Articles

The BP share price has been on a roller coaster, but where will it go next?

Analysts remain upbeat about 2026 prospects for the BP share price, even as an oil glut threatens and the price…

Read more »

Investing Articles

Prediction: move over Rolls-Royce, the BAE share price could climb another 45% in 2026

The BAE Systems share price has had a cracking run in 2025, but might the optimism be starting to slip…

Read more »

Tesla car at super charger station
Investing Articles

Will 2026 be make-or-break for the Tesla share price?

So what about the Tesla share price: does it indicate a long-term must-buy tech marvel, or a money pit for…

Read more »

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Investing Articles

Apple CEO Tim Cook just put $3m into this S&P 500 stock! Time to buy?

One household-name S&P 500 stock has crashed 65% inside five years. Yet Apple's billionaire CEO sees value and has been…

Read more »

Dividend Shares

How much do you need in an ISA to make £1,000 of passive income in 2026?

Jon Smith looks at how an investor could go from a standing start to generating £1,000 in passive income for…

Read more »

Investing Articles

Can the Lloyds share price hit £1.30 in 2026?

Can the Lloyds share price reproduce its 2025 performance in the year ahead? Stephen Wright thinks investors shouldn’t be too…

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

Down 45%, is it time to consider buying shares in this dominant tech company?

In today’s stock market, it’s worth looking for opportunities to buy shares created by investors being more confident about AI…

Read more »