3 common mistakes investors make with penny stocks

On the lookout for penny stocks, Christopher Ruane shares three common mistakes he seeks to avoid when choosing them for his portfolio.

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.

In for a penny, in for a pound? Penny stocks can seem appealing. The idea that an investment that costs a matter of pence could generate pounds of rewards can be beguiling.

But there are a lot of simple mistakes investors make choosing penny stocks. Here are three I’ve observed.

Focus on price not value

Here’s a thought experiment. Let’s say my children could travel to school in the cheapest bus the school can buy — or the most expensive. Which would I prefer?

The answer seems obvious. For most people, quality is worth paying for. Yet penny stocks can focus our attention on price not value.

The legendary investor Warren Buffett said that “price is what you pay, value is what you get”. A penny stock could indeed turn out to be good value. But to assess what the underlying value is, I’d look not just at the price. I’dd also consider the company’s future ability to generate profits and create shareholder value.

Penny stocks and balance sheets

One common mistake investors make is buying on share price alone without looking at the company’s balance sheet.

Imagine buying a second hand car for £100. That might sound like a bargain. But if it needs to have an MOT the following week that identifies £3,000 of necessary repairs, even the £100 price tag could seem like a bad bargain in retrospect.

It’s the same when a company has a lot of debt or other future financial obligations that dwarf its financial resources. How will it pay them? Will it have a rights issue and dilute shareholders as a penny stock like Hammerson did last year?

Balance sheets scare many people. But they aren’t as technical as they may sound. Before investing in any penny stocks I’d always spend at least a few minutes looking at a company’s recent balance sheets. Seeing what a company’s debt profile looks like is a crucial indicator of its financial health, in my view.

Single-asset focus

A lot of penny stocks are exclusively or mainly focused on a single asset. I find that’s particularly true with early-stage resource stocks. For example, Bacanora Lithium is pinning a lot of hope on one project in Mexico.

Sometimes, such a focus is positive and a lack of diversification can amplify rewards. If a company owns one mining licence and literally strikes gold, its return on capital could be huge.

But the reverse is true as well – if a company is over-concentrated in one asset, the lack of diversification can disproportionately damage it. Single-asset focus improves potential reward only by increasing potential risk, in many cases.

That matters because, as Warren Buffett reminds us: “Rule number one: never lose money. Rule number two: never forget rule number one”. That can be hard to do. But by learning from common mistakes other investors make, I hope I can improve my likely returns when identifying penny stocks to consider for my portfolio.

christopherruane 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

Investing Articles

Will the S&P 500 crash in 2026?

The S&P 500 delivered impressive gains in 2025, but valuations are now running high. Are US stocks stretched to breaking…

Read more »

Teenage boy is walking back from the shop with his grandparent. He is carrying the shopping bag and they are linking arms.
Investing Articles

How much do you need in a SIPP to generate a brilliant second income of £2,000 a month?

Harvey Jones crunches the numbers to show how investors can generate a high and rising passive income from a portfolio…

Read more »

Investing Articles

Will Lloyds shares rise 76% again in 2026?

What needs to go right for Lloyds shares to post another 76% rise? Our Foolish author dives into what might…

Read more »

Investing Articles

How much passive income will I get from investing £10,000 in an ISA for 10 years?

Harvey Jones shows how he plans to boost the amount of passive income he gets when he retires, from FTSE…

Read more »

Investing Articles

Down 34% in 2025 — but could this be one of the UK’s top growth stocks for 2026?

With clarity over research funding on the horizon, could Judges Scientific be one of the UK’s best growth stocks to…

Read more »

piggy bank, searching with binoculars
Investing Articles

Can the rampant Barclays share price beat Lloyds in 2026?

Harvey Jones says the Barclays share price was neck and neck with Lloyds over the last year, and checks out…

Read more »

Investing Articles

Here’s how Rolls-Royce shares could hit £25 in 2026

If Rolls-Royce shares continue their recent performance, then £25 might be on the cards for 2026. Let's take a look…

Read more »

Departure & Arrival sign, representing selling and buying in a portfolio
Investing Articles

Prediction: in 2026 the red-hot Rolls-Royce share price could turn £10,000 into…

Harvey Jones can't believe how rapidlly the Rolls-Royce share price has climbed. Now he looks at the FTSE 100 growth…

Read more »