I’d avoid these 5 mistakes to maximise returns from the best UK shares

When seeking out the best UK shares, I try to keep my own psychology in check. These five mistakes could destroy the best-planned 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.

When looking for the best UK shares to buy, investors like me often find the biggest challenge is their own emotions. Fear, greed, hope, frustration and boredom can wreak havoc, according to a new study by online trading platform IG.

Here are five mistakes that can scupper even the very best UK shares and how I get round them.

Being ruled by fear

Nobody likes losing money, but investors can take the principle too far, says IG analyst Chris Beauchamp. “Fear can cloud decision making, causing a trader to close out a position too early, or miss out on a profit by being too afraid to open a trade.”

To reduce the fear factor, I do my research carefully to be confident of buying the best UK shares I can. I want know why I’m buying, how long I plan to hold, what kind of return I expect, and how each stock fits into my portfolio. 

Getting too greedy

Investors who demand excessive gains often act irrationally, Beauchamp says. “It manifests itself when a trader gets over enthusiastic and trades beyond their means. Or opens more positions than usual or holds on to them for too long to chase an even greater gain.”

In my early years as an investor, I sold stocks when they didn’t deliver after just two or three months. Everybody wants to make money, but getting greedy isn’t good.

Expecting the best UK shares to be even better

It’s good to be optimistic when buying stocks, but don’t overdo it. Even the best UK shares may take time to show their true worth. Beauchamp says excessive optimism manifests itself in strange ways. “For example, someone might hold on to a losing trade because they believe that it will reverse its trend and become profitable.”

If buying a FTSE 100 blue-chip, I wouldn’t expect its share price to double in six months, then complain when it doesn’t. I set more realistic expectations.

Getting frustrated when UK shares do unexpected things

Beauchamp says too many traders get annoyed when markets behave in ways they didn’t anticipate. “The largest cause of frustration is loss, but it could also be that a trader didn’t gain as much profit as they thought they would.”

Even the best UK shares will make losses at some point. I don’t rush to sell when that happens, but check to see if my original investment case still holds. If it does, I take a deep breath then wait for the recovery.

Getting bored even by the best shares

If investors feel their portfolio isn’t delivering enough action, they may take unnecessary risks to stir up some excitement, Beauchamp also says.

I’ve done this. Usually when I’ve been checking my portfolio once too often, to see how it’s getting on. Now, I only check its progress every few weeks. I trust myself to pick the best UK shares I can. Then let them get on with it.

Harvey Jones 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

The key number that could signal a recovery for the Greggs share price in 2026

The Greggs share price has crashed in 2025, but is the company facing serious long-term challenges or are its issues…

Read more »

Rolls-Royce's Pearl 10X engine series
Investing Articles

Can the Rolls-Royce share price hit £16 in 2026? Here’s what the experts think

The Rolls-Royce share price has been unstoppable. Can AI data centres and higher defence spending keep the momentum going in…

Read more »

Businessman with tablet, waiting at the train station platform
Investing Articles

Up 150% in 5 years! What’s going on with the Lloyds share price?

The Lloyds share price has had a strong five years. Our writer sees reasons to think it could go even…

Read more »

Investing Articles

Where will Rolls-Royce shares go in 2026? Here’s what the experts say!

Rolls-Royce shares delivered a tremendous return for investors in 2025. Analysts expect next year to be positive, but slower.

Read more »

Emma Raducanu for Vodafone billboard animation at Piccadilly Circus, London
Investing Articles

Up 40% this year, can the Vodafone share price keep going?

Vodafone shareholders have been rewarded this year with a dividend increase on top of share price growth. Our writer weighs…

Read more »

Buffett at the BRK AGM
Investing Articles

Here’s why I like Tesco shares, but won’t be buying any!

Drawing inspiration from famed investor Warren Buffett's approach, our writer explains why Tesco shares aren't on his shopping list.

Read more »

Investing For Beginners

If the HSBC share price can clear these hurdles, it could fly in 2026

After a fantastic year, Jon Smith points out some of the potential road bumps for the HSBC share price, including…

Read more »

Investing Articles

I’m thrilled I bought Rolls-Royce shares in 2023. Will I buy more in 2026?

Rolls-Royce has become a superior company, with rising profits, buybacks, and shares now paying a dividend. So is the FTSE…

Read more »