How to manage your psychology in the stock market

Michael Taylor looks at how to manage our psychology in the stock market.

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.

Many investors believe that other investors are their competition. 

They’re wrong.

Their only competition is themselves. Stock market investors go through a huge range of emotions, from excitement and greed, to fear and self-loathing. But fear not – there are several ways that we can manage our heads in this game and not make some common mistakes. 

Have a self-imposed limit on position size

By having a limit on how big our position is, we are able to stop our greed from ballooning out of control. When we spot a good opportunity in the market, it’s natural that we want to put our best ideas to work there. But this is dangerous – what if we are wrong?

Using a limit on position sizing will prevent us from being burned should we be wrong. If we do pick a winner, then one stock can easily become a large percentage of our portfolio – meaning that our portfolio’s performance is now correlated with that stock. With a position size limit, we’ll be forced to trim the position and bank profits as the position size increases. 

Look for reasons to not buy 

We all love buying stocks. But what we should be doing is looking for reasons not to buy the stock right from the start. That means doing some digging, and looking at whether management are aligned with shareholders. Check the director salaries. Check the director shareholdings. Are they clock punchers? Or are they well motivated to create and deliver shareholder value?

It’s also worth looking at what the company actually does, and going out to speak to its customers. If the customers tell you that the product is nothing special, then that means it is easily replaceable. And if it’s easily replaceable, then it has no moat. 

Check the company’s moat

If a company doesn’t have a moat, then it offers nothing to protect itself from copycats. That means anyone could set up as a competitor and erode our target company’s margins. Always check for the moat and see how strong it is.

Understand why you’re buying and when you’d sell

According to Sun Tzu from The Art of War, a good general wins first then battles. That is exactly what we should be doing with our investments.

If we understand why we’ve bought, then even if the price is showing our position as buying in the red, then we must remember why we bought in the first place and not get scared and shaken out of our position. 

We should also know at what point we’re happy to sell. If certain aspects of the business change, then we know we should sell our shares in the stock. 

Know what our sell triggers are, and then monitor the stock. 

Views expressed 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

This FTSE 100 stock supercharged my SIPP in 2025. Can it repeat the trick in 2026?

A FTSE 100 stock has lifted my SIPP this year, showing how long-term thinking, volatility, and optionality can shape retirement…

Read more »

UK supporters with flag
Investing Articles

£1k invested in the UK stock market during the pandemic is currently worth…

Jon Smith not only points out the specific gains from investing in the stock market generally since the pandemic, but…

Read more »

Santa Clara offices of NVIDIA
Investing Articles

Will Nvidia shares continue surging in 2026 and beyond?

2026 will be an exciting year for Nvidia shares as the semiconductor giant launches its latest generation of AI chips.…

Read more »

Investing Articles

Check out the BP share price and dividend forecast for 2026 – it’s hard to believe!

Harvey Jones is feeling rather glum about the BP share price but analysts reckon it's good to go. So who's…

Read more »

Investing Articles

I asked ChatGPT for its top FTSE 100 stock for 2026, and it said…

Muhammad Cheema asked ChatGPT for its top FTSE 100 pick, and its response surprised him. He thinks he’s found an…

Read more »

Investing Articles

By the end of 2026, can Rolls-Royce shares hit £17?

Rolls-Royce shares have had another phenomenal year, rising by 95.4%. Muhammad Cheema takes a look at whether they can continue…

Read more »

Investing Articles

Will Barclays shares continue their epic run into 2026 and beyond?

Noting that difference of opinion is a global norm, Zaven Boyrazian discusses what the experts think will happen to Barclays…

Read more »

Investing Articles

Prediction: analysts reckon Taylor Wimpey shares will soar almost 25% in 2026. Seriously?

When it comes to Taylor Wimpey shares, Harvey Jones is the eternal optimist. So will the high-yielding FTSE 250 housebuilder…

Read more »