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.

Are index funds safe?

Are index funds safe, or are they a bubble waiting to burst?

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!.

Index funds are often touted as being suitable for most investors. It’s easy to see the appeal of them. Hard-earned savings can be eaten away by extortionate fees of active fund managers. The usually low lump sum and monthly contribution amounts appeal to those who wish to start small and save a percentage of their regular income. And passive investors can set up a monthly direct debit and then forget about their savings until retirement. Or can they?

Warren Buffett believes in index trackers, as do many of my fellow Fool’s. However, of late, numerous people have been warning about the dangers of investing in them. I wanted to examine this side of the argument.

Should you buy Rolls Royce 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.

Michael Burry, the famed investor from The Big Short, has concerns about passive funds. In Bloomberg, he likened index investing to the subprime CDOs that were instrumental in causing the 2008 financial crisis.

According to Burry, the similarities are caused because the price setting is not being done by “fundamental security-level analysis”. His worry is that passive investors are buying each company at a fixed ratio, rather than considering the actual value of the company in the underlying index.

Although I think index investing – or holding passive funds as part of an investment portfolio – could be a great strategy, I do share some of Burry’s concerns.

The main obstacle for me is – what happens if the markets go into free-fall?

The next bubble?

I question the temperament of a passive fund-holder. An investor with their money held totally in index funds could see their wealth drop by a huge margin. They would lack the benefit of an active fund or self-managed equities, which might enable them to shift assets to other territories or classes.

What would the average passive investor do in that situation? Hold and watch the price fall further, or sell and realise their losses? I think in this situation, a market sell-off could occur. Perhaps, then, we are in the bubble that Burry describes.

Of course, no one can predict what will happen in the market going forward. But in this situation, if the bubble pops, I think the true cool-headed passive investor who continues to buy at these low price points, might be rubbing their hands together.

Spiral?

I think that the problem of passive investors rushing to the door, and causing a downward spiral, could only arise if index funds owned the majority of the market. An estimate in 2017 put the global figure of shares owned by index funds at 18%.

Index funds have their place in the market, just as actively managed funds and personal investors who pick their investments do. Ultimately, though, if an investor can set aside time to learn about investing and keep up to date with the market news, and avoid picking a few losing stocks in the index, their returns should exceed the respective market index.

T Sligo 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

Smartly dressed middle-aged black gentleman working at his desk
Investing Articles

Near 5-year lows, here’s what the experts say about Greggs shares

Greggs’ shares went from a powerful growth story in 2024 to one of the FTSE 250’s worst-performing shares. Do experts…

Read more »

Investing Articles

How investing £20k in a Stocks and Shares ISA could generate a £15,815 yearly passive income for life

Harvey Jones shows how a single lump sum invested in a Stocks and Shares ISA can generate a high and…

Read more »

Investing Articles

Here are 3 cash-covered 7%-yielding FTSE 250 dividend shares with 30+ years of payouts

The FTSE 250 can be a minefield if you don't know what to look for. Mark Hartley breaks down his…

Read more »

Seniors having fun on bicycles in spring landscape
Investing Articles

With a 5.4% yield, 100 shares of this dividend stock could pay £250 of passive income

Our writer thinks this FTSE 250 bank stock still looks great value today, despite skyrocketing 303% over the past five…

Read more »

Landlady greets regular at real ale pub
Investing Articles

By mid-2027, analysts expect £10,000 in Diageo shares to be worth…

Diageo shares have tanked amid concerns over long-term demand for alcohol beverages. Is there the possibility of a rebound in…

Read more »

Wall Street sign in New York City
Investing Articles

UK investors are buying this stunning S&P 500 stock over Microsoft, Netflix and Nvidia. Why?

If you haven't heard of this S&P 500 growth stock yet, you soon will. British investors are keen but Harvey…

Read more »

Overjoyed exited middle aged married couple giving high five, finishing doing domestic paperwork together at home. Euphoric happy older mature spouses celebrating successful investment or purchase.
Investing Articles

How much do you need in an ISA to target a second income of £1,744 a month?

Harvey Jones shows how regular investing in FTSE 100 shares can build a generous second income for retirement, with minimum…

Read more »

Road 2025 to 2032 new year direction concept
Investing Articles

By July 2027, Lloyds shares could turn £5,000 into…

Do Lloyds' shares have what it takes to deliver another spectacular 40%+ gain in the 12 months to July 2027?…

Read more »