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.

Just because it’s plausible, doesn’t mean it’s right

Investing manias didn’t stop with tulips, or the South Sea Bubble — or the dotcom era and subsequent dubious investment themes.

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!.

Back in the 1960s and 1970s, the ‘Nifty Fifty’ were 50 large American companies whose shares were regarded as solid, dependable, low-risk growth stocks, with stable earnings.
 
Companies such as Coca-Cola, General Electric, Procter & Gamble, and Johnson & Johnson, in other words: the bedrock of the American economy.

The proposition for investors was simple. These were companies that were built to last, were well positioned for growth, and were well managed — so buy a broad cross-section of the Nifty Fifty, hold for the long term, and forget about fancy stock picking.
 
It worked great — right up until it didn’t. First, some of the Nifty Fifty weren’t in fact so nifty, after all. Eastman-Kodak, Polaroid, Xerox, Gillette: need I say more? Plus, valuations became stratospheric, over time. By the early 1970s, valuations — price-to-earnings ratios — were around 70.
 
Eventually, a few years into the Seventies, it all came crashing to earth. As, doubtless, so might today’s wildly hyped ‘FAANG’ mania, with FAANG standing for Facebook, Apple, Amazon, Netflix, and Google (now Alphabet).

History repeats itself

The trouble is, such episodes are far from isolated examples — and indeed, stretch right back to the South Sea Bubble of the early 1700s, and the Tulip Mania of 80 years earlier.
 
The dotcom mania, for instance. In the mid-1990s, any stock that could spin a half-decent e-commerce tale — and many that, frankly, couldn’t — got swept up in the same rabid enthusiasm, seeing sky-high valuations and a mass suspension of investor disbelief.
 
You didn’t need profits, or even sales revenues, investors were told. You needed ‘eyeballs’. Or was it ‘clicks’? I forget.

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.

But eventually — in the closing hours of 1999, as it happens — reality rudely intruded.
 
One by one, the dotcom heroes crashed to earth. And even those that survived — such as Amazon — did so with massively lower valuations and share prices.

BRIC’d

These investing ‘themes’ — as they’re known — aren’t always just about companies, or industries.

Remember the BRICs? For a few years, anything to do with Brazil, Russia, India, or China could do no wrong.

But of the four, only China has really stood the test of time. And that is more as an economy, not so much as a source of reliable homes for your investment cash.

Russia, India, Brazil? One way or another, the shine has undeniably come off.

Sell! Sell! Oh no, buy!

Now let’s come closer to the present day. Last October, to be exact. And here’s a sorry tale not about misplaced claims for what investors should buy, but for what they should sell.

Anyone remember the COP26 climate change conference in Glasgow last October, attended by world leaders, and kicked-off by our very own Boris Johnson?
 
Countries signed up to ban future oil exploration, to call a halt to new oil fields, and phase out fossil fuels as quickly as possible. Analysts queued up to point out that the balance sheets of the world’s major oil giants had a fatal flaw: their gigantic oil fields were largely valueless. ‘Stranded assets’ was the term used: the oil was there, alright — but no one would want it.
 
Then Russia invaded Ukraine. Suddenly, those same world leaders — Boris Johnson among them — were touting ‘energy security’.
 
And equally suddenly, stock markets came to the realisation that those same unloved oil giants’ balance sheets were stuffed full of valuable ‘black gold’: oil reserves that were no longer stranded, but immensely valuable.
 
Their share prices soared commensurately. My holding in Shell, for instance, is up 49% since COP26. BlackRock Energy and Resources Trust, another holding, is up 44%.
 
Clearly, anyone who sold out of the oil majors in the wake of the COP26 hoopla will be feeling virtuous, but poorer.

Their hype; your risk

My message in all this? Avoid getting sucked in by grandiose — if persuasive — investing themes.

A dabble, yes. A modest investment, maybe.

But have an eye to the downside. Don’t bet the farm. Stay diversified, and don’t over-commit.

The narrative may be compelling, but that doesn’t mean that it is true — or inevitable.

John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. Malcolm holds shares in Shell and BlackRock Energy and Resources Trust. The Motley Fool UK has recommended Amazon and Apple. 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

Young Black woman looking concerned while in front of her laptop
Investing Articles

Have investors got BT shares all wrong?

BT shares spiked during the 1990s telecom boom, then struggled for two decades. Harvey Jones says it's the future that…

Read more »

BUY AND HOLD spelled in letters on top of a pile of books. Alongside is a piggy bank in glasses. Buy and hold is a popular long term stock and shares strategy.
Investing Articles

Looking for buying opportunities in June? Here’s 1 to consider from my Stocks and Shares ISA

The conflict in Iran is making one of the investments in Stephen Wright’s Stocks and Shares ISA volatile. But could…

Read more »

Row of blue European Union flags in Brussels.
Investing Articles

After crashing 13.7% today, is Wise now a stock market bargain at 805p?

Wise was one of the biggest fallers on the UK stock market today. What on earth is going on with…

Read more »

Road 2025 to 2032 new year direction concept
Investing Articles

At 8% is this eye-popping FTSE 100 dividend yield simply too good to be true?

The dividend yield is to die for, but the share price is lacking in life. Harvey Jones examines whether this…

Read more »

The flag of the United States of America flying in front of the Capitol building
Investing Articles

UK investors are piling into this legendary S&P 500 growth stock while it’s down 50%

This US growth stock fell from $240 to $80 amid AI disruption fears. And investors are now aggressively buying it…

Read more »

Abstract 3d arrows with rocket
Investing Articles

£19,469 invested in BAE Systems shares 6 months ago is now worth…

BAE Systems shares have been charging higher of late. Is now the time to consider buying or is this top…

Read more »

Finger clicking a button marked 'Buy' on a keyboard
Growth Shares

Analysts think this growth share could rally a further 26% in the next year

Jon Smith talks through a growth share that's up 20% in the past month and could keep going based on…

Read more »

Two business people sitting at cafe working on new project using laptop. Young businesswoman taking notes and businessman working on laptop computer.
Investing Articles

Are we staring at a once-in-a-decade chance to buy cheap FTSE 100 shares like this one?

Harvey Jones is on the hunt for cheap shares and cannot believe some of the bargains available today. One UK…

Read more »