Should I invest £1,000 in the S&P 500 in October?

Our writer takes a look at the S&P 500’s remarkable run and wonders whether he should invest some cash into the index this month.

| More on:

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.

Little pumpkins and mandarines with painted faces for Halloween on wooden background

Image source: Getty Images

The S&P 500 has long been the gold standard for stock market returns. This blue-chip index, which tracks the performance of the 500 largest publicly traded companies in the US, has returned just above 10% on average since its 1957 inception.

Over the last 10 years, however, the annualised return has been running slightly higher than that (around 12%). With dividends reinvested, it’s been above 13%! That’s an incredible, inflation-busting return!

This hot run of form isn’t guaranteed to continue. But if it did and the index returned 12%, then a £1,000 investment today would become £29,959 after 30 years (discounting any platform fees and currency fluctuations). That’s down to the incredible power of compounding.

So, should I invest a grand in the index this month?

Echoes of the past?

My worry here is that the S&P 500 has surged 20% this year and, at 5,751 points, is near an all-time record. This has been driven by stocks like artificial intelligence (AI) chipmaker Nvidia (up 154%).

While I wouldn’t bet against it hitting 6,000 before 2025, the index’s P/E ratio is now approaching 30, which is well above its historic average. I’m concerned about this sky-high valuation.

On top of this, I’ve just read that the S&P 500 is having it’s best year since 1997. In hindsight, we know what was lurking around the corner not long after that — a huge tech market crash!

Could the same happen to the AI stocks that have driven the market higher? We don’t know, but it does make me reluctant to invest a lump sum in the index right now.

As Mark Twain (purportedly) said: “History doesn’t repeat itself, but it does rhyme.” This can certainly be true in the stock market.

Fund management FOMO

According to the Financial Times, UBS analysts estimate that Nvidia alone accounts for 1.43% of the 2.1% year-to-date underperformance of active fund managers focused on US large-caps. In other words, those not holding the chipmaker’s shares have struggled to keep up with the S&P 500’s return this year.

The beauty about being an individual long-term stock-picker is that I can exercise patience. I’m not compelled to chase S&P 500 rallies or popular stocks.

Unloved small fry

So, this month, I’m going to continue hunting for UK small-cap stocks. Unlike the S&P 500, these market-cap minnows are still very much out of favour.

One stock that I’m considering adding to is Windward (LSE: WNWD). This is a small software firm operating an AI-powered platform that uses predictive analytics to manage risks on the high seas.

The shares are down 23% in the past month, which I imagine is linked to where the firm is based (Israel). Obviously, the wider Middle East conflict presents risks.

Stepping back though, this situation is also leading to massive headaches for shipping companies, especially around key waterways like the Red Sea and Gulf of Oman. Windward’s focus on maritime intelligence and risk management, including tools to monitor war risk zones, appears more relevant than ever today.

In H1, revenue jumped 37% year on year to $17.6m, with new commercial contracts won and losses shrinking. Its blue-chip customers already include BPShell, and Interpol. At 124p, I reckon the stock could outperform the S&P 500.

Ben McPoland has positions in Windward. The Motley Fool UK has recommended Nvidia. 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

Man writing 'now' having crossed out 'later', 'tomorrow' and 'next week'
Investing Articles

The best time to buy stocks? It might be right now

Short-term issues that delay long-term trends create opportunities to buy stocks. And that could be happening right now with a…

Read more »

Queen Street, one of Cardiff's main shopping streets, busy with Saturday shoppers.
Investing Articles

Here’s why Next stock rose 5% and topped the FTSE 100 today

Next was the leading FTSE 100 stock today, rising 5%. Our writer takes a look at why and asks if…

Read more »

Renewable energies concept collage
Investing Articles

Up 458% in a year, could the Ceres Power share price go even higher?

Christopher Ruane reviews some highs and lows of the Ceres Power share price over the years and wonders whether the…

Read more »

Rolls-Royce's Pearl 10X engine series
Investing Articles

Are the glory days over for Rolls-Royce shares?

Rolls-Royce shares have soared in recent years. Lately, though, they have taken a tumble. Could there be worse still to…

Read more »

Group of friends meet up in a pub
Investing Articles

Are ‘66% off’ Diageo shares a once-in-a-decade opportunity?

Diageo shares have taken another hit in the early weeks of 2026. Are we looking at a massive bargain or…

Read more »

Investing Articles

Meet the UK stock under £1.50 smashing Rolls-Royce shares over the past year

While Rolls-Royce shares get all the attention, this under-the-radar trust has quietly made investors a fortune. But is it still…

Read more »

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

Down 19%, the red lights are flashing for Barclays shares!

Barclays shares have fallen almost a fifth in value as the Middle East war has intensified. Royston Wild argues that…

Read more »

Aviva logo on glass meeting room door
Investing Articles

After falling another 5%, are Aviva shares too cheap to ignore?

£10,000 invested in Aviva shares five years ago would have grown 50% by now. But what might the future hold,…

Read more »