We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- 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. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

The great AI stock market crash! Has it already started?

Talk of a US stock market crash seems to be in the headlines almost every day these days, as stock prices keep on setting new records.

| More on:
Mindful young woman breathing out with closed eyes, calming down in stressful situation, working on computer in modern kitchen.

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

There’s an old saying — if we knew the stock market was going to crash tomorrow, it would crash today.

And based on what happened to US markets Friday (10 October), has the crash already started? It was the biggest US daily fall since President Trump shocked the world with his massive tariff plans in April.

Should you buy Nvidia shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

The S&P 500 lost 2.7% on the day, with the Nasdaq down 3.6%. AI-related companies have accounted for around 80% of US stock market gains this year. Is it time to hit the Sell button?

Panic! Or maybe not

The first thing is… relax. And then don’t read too much into one day’s stock market moves. As I write on Monday (13 October), US stock market futures are bouncing back.

It seems like Friday’s investors were paying more attention to Trump’s renewed tariff threat to China than to JP Morgan CEO Jamie Dimon. It was Dimon who, last week, warned of a 30% chance of a stock market crash within the next six months — or maybe two years.

OpenAI CEO Sam Altman has said he expects some people will lose a lot of money backing AI stock bubbles. But he’s also said: “We are confident that this technology will drive a new wave of unprecedented economic growth.

Who’s right? The bears who expect losses from an AI slump? Or the bulls who see big AI gains? I reckon they’re all right, to some degree.

2000 all over?

The dotcom bubble bursting in 2000 was scary. And some today see Nvidia (NASDAQ: NVDA) as the Amazon of the AI bubble.

Remember Amazon crashed more than 90%? Let’s not forget that it went on to soar much higher — and even investors buying at the 1999 peak would have enjoyed a multi-bagger if they’d held on.

There’s something very different about Nvidia though — valuation. Never mind the dotcom price-to-earnings (P/E) valuations in the hundreds, or even in the thousands (and that’s for companies with actual earnings). Nvidia currently has a forecast P/E of 42, dropping to around 25 by 2028.

With the kind of growth potential it could have, Nvidia stock doesn’t look overpriced to me. Valuation is, of course, based on forecasts — and those surely reflect the massive AI optimism we see in all the headlines today.

If companies are ploughing too much cash into AI too soon, those forecasts could be excessive. And if they’re lowered, that’s another thing that could trigger a deflation.

Bull or Buffett?

I’m bullish on AI driving Nvidia higher in the long term. But I’m really wary of the cash piling into everything AI right now. I fully expect some of the high flyers to crash and burn. And I fear they’ll drag the quality companies down with them.

I prefer Warren Buffett‘s approach of holding cash and waiting for better future buying opportunities — his Berkshire Hathaway is sitting on around $340bn.

But I’m approaching it like this out of long-term excitement, not short-term fear. And which company do I most hope to be able to buy cheaply in the not-too-distant future? It’s Nvidia, which I firmly rate as worthy of long-term consideration — even with the short-term danger.

JPMorgan Chase is an advertising partner of Motley Fool Money. Alan Oscroft has no position in any of the shares mentioned. The Motley Fool UK has recommended Amazon and 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

Affectionate Asian senior mother and daughter using smartphone together at home, smiling joyfully
Investing Articles

Growth AND dividends? Check out this top cheap penny share!

Looking to get maximum bang for your buck? Consider this white-hot UK penny share with an 11.5% dividend yield and…

Read more »

Smiling young man sitting in cafe and checking messages, with his laptop in front of him.
Investing Articles

Snowflake lit up my ISA last week. Could this AI stock be next?

Edward Sheldon’s ISA got a massive boost last week when Snowflake shares surged 40%. He believes there’s more to come…

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

How much would you need in an ISA to match the new State Pension and get another £12,547 a year?

Harvey Jones says nobody should rely purely on the State Pension to fund retirement. They should also aim to generate…

Read more »

Rear view image depicting a senior man in his 70s sitting on a bench leading down to the iconic Seven Sisters cliffs on the coastline of East Sussex, UK. The man is wearing casual clothing - blue denim jeans, a red checked shirt, navy blue gilet. The man is having a rest from hiking and his hiking pole is leaning up against the bench.
Investing Articles

How much is £9,999 invested in a Cash ISA 9 years ago worth today?

Harvey Jones says the Cash ISA may look tempting but is likely to shrink the value of your money over…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Are Lloyds shares 23% undervalued?

Lloyds shares have fallen in value since a high reached earlier this year. Could this be a sign the FTSE…

Read more »

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

Here’s why Legal & General is still one of the UK’s most popular SIPP buys

So far in 2026, UK SIPP investors have largely stuck to the same group of favourite FTSE 100 stocks. And…

Read more »

Mature people enjoying time together during road trip
Investing Articles

How have Aviva shares become a dividend juggernaut? 5 reasons why

With a long record of dividend growth and enormous yields, Aviva's shares are in high demand with income investors. Can…

Read more »

Middle aged businesswoman using laptop while working from home
US Stock

This is the most undervalued stock in the Dow Jones index

Jon Smith points out a Dow Jones stock with a price-to-earnings ratio below 10, with strong recent earnings that could…

Read more »