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.

Want to become an ISA millionaire? Know when to sell shares!

Holding quality shares in a tax-efficient ISA increases your chances of becoming rich. So too does knowing when to sell your duds.

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!.

Here at the Motley Fool UK, it’s our belief that buying high-quality shares and holding them within a tax-efficient ISA can dramatically improve your wealth. With a bit of patience, you could even become a stock market millionaire.

Notwithstanding this, there will very likely be times in any investment career when it makes sense to sell a stock. Here’s are three reasons for doing so.

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.

The story has changed

It’s remarkably easy to fall in love with a particular share, particularly one you’ve devoted time to thoroughly researching.

Sadly, nothing is guaranteed in the market, regardless of how good the company’s story is. Today’s dream stock can quickly become a nightmare if events (internal, external, or both) go against it. The key is learning to distinguish a major setback from a temporary hurdle.

One might argue that the investment case for travel stocks has dramatically changed in 2020 due to the pandemic. Even when the coronavirus cloud does finally lift, some companies’ share prices may remain stagnant for a long time afterward due to the financial damage they’ve endured.

A good example from a different sector would be Lloyds Bank – one of the most popular stocks with retail investors.

Despite making it through the financial crisis, anyone backing the shares in March 2009 won’t have made much money since (dividends excluded). Had they switched to technology stocks, however, the outcome would have been very different.

The price is too high

Great shares are seldom without friends and rarely cheap as a consequence. What’s more, the very best of the best just go on getting more expensive as they continually beat expectations. This explains why top UK fund manager Terry Smith thinks there are more important things to focus on than the price you pay for a stock. 

Then again, there will be times when a share price becomes so utterly detached from a company’s fundamentals that taking at least some money off the table feels like the right thing to do (especially as you won’t pay tax on capital gains if it is held within an ISA). An example of this might be when a company is hyped beyond belief but has yet to make a profit.

Even if a stock’s prospects really are great, it will take time for these to be realised. Will all investors be prepared to hold and wait? I doubt it. 

You’ve made a mistake

Few active ISA investors are able to strike it rich without making a few/a lot of mistakes along the way. This may be the result of acting too cautiously, recklessly, or simply picking a stock that didn’t work out.

Regardless of the reason, admitting that you’ve made a mistake can be hard. This is why we cling to losing stocks even when there’s little chance of recovery. Even if a company is able to turn things around, the numbers might still be against you. Being 50% down requires a share to double in value just to get you back to break-even.

Now, that sort of move isn’t impossible, particularly in illiquid small-cap stocks, but it can take a while if it comes at all. In the meantime, other companies are making great money for their investors.

The opportunity cost of staying invested in a loser can often be greater than accepting the loss and learning from it. 

Paul Summers has no position in any of the shares mentioned. The Motley Fool UK has recommended Lloyds Banking Group. 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

Close-up as a woman counts out modern British banknotes.
Investing Articles

How to buy growth stocks at below-market prices

Don’t want to pay market prices for growth stocks? Here's a sneaky strategy investors can use to get deals at…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Are Meta shares at the start of a comeback?

Shares in Meta Platforms have been held back by the firm’s high-risk approach to AI. But is this the moment…

Read more »

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Investing Articles

With dividend yields averaging above 7%, are these 2 UK shares worth considering?

Muhammad Cheema looks at two UK shares: ITV and Legal & General. With yields of 6.1% and 8.1%, should investors…

Read more »

Close-up as a woman counts out modern British banknotes.
Investing Articles

How much do you need to invest in dividend stocks to be able to retire?

Some 77% of people in the UK won't have enough income to manage a moderate retirement. Here’s how dividend stocks…

Read more »

Abstract bull climbing indicators on stock chart
Investing Articles

FTSE 250 stock CMC’s shares have rocketed 51%! What’s going on?

CMC Markets' shares have surged by double-digits today after a strong full-year trading update. Is the FTSE 250 company now…

Read more »

A row of satellite radars at night
Investing Articles

Will I buy SpaceX at £100 a share in my SIPP?

Ben McPoland is considering adding SpaceX stock to his SIPP on 12 June. Might this be a no-brainer buy-and-hold opportunity?

Read more »

Young brown woman delighted with what she sees on her screen
Investing Articles

Aberdeen shares are back in the FTSE 100 — is this turnaround stock just getting started?

Following its return to the FTSE 100, Andrew Mackie examines whether Aberdeen's shares could be on the cusp of a…

Read more »

Shot of an young mixed-race woman using her cellphone while out cycling through the city
Investing Articles

Down 65% with a 5.65% yield! Is this dividend share a once-in-a-decade buy? 

Harvey Jones says this dividend share is still posting decent profits at a challenging time. Its low valuation and high…

Read more »