Stock market bubble? What I’d buy and sell to protect my ISA today

A stock market bubble that bursts could wipe out years of hard-earned profits. Here’s what I’d do now to protect my ISA from a crash.

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.

When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in.

Read More

The content of this article is provided for information purposes only and is not intended to be, nor does it constitute, any form of personal advice. Investments in a currency other than sterling are exposed to currency exchange risk. Currency exchange rates are constantly changing, which may affect the value of the investment in sterling terms. You could lose money in sterling even if the stock price rises in the currency of origin. Stocks listed on overseas exchanges may be subject to additional dealing and exchange rate charges, and may have other tax implications, and may not provide the same, or any, regulatory protection as in the UK.

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.

I’ve heard a lot of talk about a potential stock market bubble popping soon. Euphoria is everywhere. Wild speculation reigns. And share prices are going gangbusters while investors fling cash into unprofitable companies. Even the biggest investment banks in the world are worried.

So how should I protect my ISA today?

First steps

Those of us who were heavily invested in the last major crash in March 2020 felt an enormous amount of pain. I personally lost tens of thousands in paper profits in my ISA. But three principles saved me. I didn’t panic. I tried to learn from my mistakes. And I never made the same mistake twice. 

You see, if another stock market bubble pops, it could potentially wipe out all the hard-earned gains I’ve made over the last decade. I wasn’t well set up for the last big crash. But I’ll definitely be ready this time.

Stock market bubble-up 

The rise of companies like Tesla seem to me a herald of the shaky foundations on which a stock market bubble is built. And the calls for some semblance of reality are getting louder every day. Goldman Sachs sees bubbles everywhere it looks, for example. Valuations are “extremely elevated”, writes the investment banks’s US equities chief David Kostin. 

Billionaire investor Seth Klarman, whom I’ve quoted many times in these pages before, said investors were now like “frogs in boiling water”. The hedge fund founder, quoted in the Financial Times, wrote that the market appeared to be acting as if all risk “has simply vanished”. 

A stock market bubble is all fun and games until it isn’t any more. As a long-term value investor I know that better than most. 

Personally, I’m starting to diversify my risk by spreading investments into companies with defensive qualities. To me that means companies whose products will be in demand in times both fair and foul.

These companies’ revenue and earnings stay relatively stable even in times of intense trouble. As such, they become a safe harbour for nervous investors if a stock market bubble approaches. I’m talking about sectors like pharmaceuticals, defence and consumer essential goods. 

What next

I’d still look closely at companies that appear undervalued. There’s no need to pile into expensive high P/E stocks just because I want a bit of safety. I own AIM-listed vaccine tester Open Orphan for example, and it appears a good bet to me. For my income investing I think there are few better plays than FTSE 100 giant GlaxoSmithKline. In the FTSE 250, defence player Qinetiq could be an option for me. 

Secondly, I will start taking a few profits here and there from my best performing shares, like 5G provider MTI Wireless Edge or battery metals producer Sylvania Platinum. The former is up over 90% for me in the last six months, while the latter has gained over 130%.

It’s impossible for me to predict when a stock market bubble could burst. The market can remain irrational longer than any of us can stay solvent. By being conservative, I might lose out on a few percentage points of gain here and there. 

But to me, there’s no harm in preparing for a pullback. Once those dominoes start to fall, the whole thing can collapse fast. I know which position I’d prefer to be in.

Should you invest, the value of your investment may rise or fall and your capital is at risk. Before investing, your individual circumstances should be assessed. Consider taking independent financial advice.

TomRodgers owns shares of MTI Wireless Edge Ltd., Open Orphan plc, and Sylvania Platinum. The Motley Fool UK owns shares of and has recommended Tesla. The Motley Fool UK has recommended GlaxoSmithKline. 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

Investing Articles

What might 2025 have in store for the Aviva share price? Let’s ask the experts

After a rocky five years, the Aviva share price has inched up in 2024. And City forecasters reckon we could…

Read more »

Hand of person putting wood cube block with word VALUE on wooden table
Investing Articles

Trading around an 11-year high, is Tesco’s share price still significantly undervalued?

Although Tesco’s share price has risen a lot in the past few years, it could still have significant value left…

Read more »

Passive income text with pin graph chart on business table
Investing Articles

£11,000 in savings? Investors could consider targeting £5,979 a year of passive income with this FTSE 250 high-yield gem!

This FTSE 250 firm currently delivers a yield of more than double the index’s average, which could generate very sizeable…

Read more »

Young Caucasian woman with pink her studying from her laptop screen
Investing Articles

Does a 9.7% yield and a P/E under 10 make the Legal & General share price a no-brainer?

With a very high dividend yield and a falling P/E forecast, could the Legal & General share price really be…

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

This growth stock is up 2,564% over 6 months! Is this FOMO?

This growth stock has experienced an incredible appreciation in its share price. It’s not a meme stock, but investors might…

Read more »

Investing Articles

This bank’s dividend yield will grow to 6.9% in 2026! And analysts say its undervalued

Analysts say this FTSE 100 stock’s dividend yield will continue to rise over the medium term. With the stock also…

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

Can we justify the red-hot Tesla share price?

It might just be FOMO, but the Tesla share price is going from strength to strength. Dr James Fox takes…

Read more »

Investing Articles

UK stocks are 52% discounted, says Goldman Sachs

With UK stocks staggeringly cheap right now, this Fool took the chance to add one unloved FTSE 100 share to…

Read more »