Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

This is the FTSE 100’s worst-performing share over a year. I’m happy to own it!

This popular stock is the FTSE 100’s worst-performing share over 12 months. It’s crashed by a sixth (16.6%). Why do I keep buying it? Here’s the answer!

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.

A GlaxoSmithKline scientist uses a microscope

Image: GlaxoSmithKline

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.

The past year has been pretty good for the FTSE 100 index. As I write, the Footsie stands at 6,919.88 points. On 14 April 2020, it closed at 5,791.30, hit by surging Covid-19 infections. Thus, the index is up almost 1130 points in 12 months — almost a fifth (19.5%). Of course, as a broad market index, the FTSE 100 tells us nothing about individual share successes and failures. Alas, my largest shareholding is the FTSE 100’s worst performer over the past year.

The FTSE 100 rebounds

As panic over Covid-19 gripped markets, global stock prices collapsed last spring. By 23 March, the FTSE 100 had plunged to a closing low of 4,993.89. However, thanks to massive monetary support from central banks and fiscal support from governments, optimism soon returned. Share prices soared, with this confidence continuing into this year. In 2021, the Footsie has already added almost 460 points (7.1%).

Over the past year, there have been huge variances in share performances within the FTSE 100. Good news: of the 101 stocks in the Footsie, no fewer than 89 have risen in value over 12 months. These uplifts range from a tiny 0.1% to an impressive 138.6%. Eight of these winning stocks have doubled or better since 14 April 2020. The average gain among these 89 winners is a tidy 45.5% (more than double the 19.5% gain of the wider index).

This is the Footsie’s biggest loser

At the other end of the scale lie 11 losers: the FTSE 100 shares that lost value over the past year. These losses range from just 0.5% to 16.6%, with the average loss coming to 7.4%. But these 11 losers include some real heavyweights, including a global bank, two giant oil companies, and a major pharmaceutical firm. Now for the bad news: shareholders of GlaxoSmithKline (LSE: GSK) own the FTSE 100’s worst-performing share over the past 12 months. I count myself among their number, as GSK is my biggest individual shareholding. Am I annoyed that the GSK share price has fallen by a sixth in a year? Yes! Am I rushing to sell? No! Here’s why.

I think the GSK share price is too cheap

As a young investor in the 1980s/90s, I would often make snap decisions, many of which backfired. After 35 years, I know to take stock before making considered decisions. So, why aren’t I selling the FTSE 100’s biggest loser today? Because I believe these shares to be undervalued and hence due a future re-rating. Also, having fallen over 30% from their 2020 peak (1,857p on 24 January 2020), I don’t see much more downside.

At the current share price of 1,295p, GSK shares trade on a price-to-earnings ratio of 11.26 with an earnings yield of 8.9%. But GSK is the world’s largest vaccine maker by revenue, so its 2020 earnings were depressed by routine vaccination programmes being abandoned during the pandemic. As Covid-19 recedes, these earnings should recover. Meanwhile, the steady 80p-per-share yearly cash payout equates to a dividend yield of 6.2% (almost double that of the wider FTSE 100).

GSK is undergoing rapid change and I do see some risks. It plans to split into two separate businesses in 2022 (BioPharma and Consumer Healthcare), which might hurt earnings. Also, the dividend is set to fall, which is bad news for income investors. And history suggests such radical corporate restructuring can have mixed results, often leading to worse returns. Nevertheless, while GSK’s stock trades at a big discount to the wider FTSE 100, I’ll keep buying more shares by reinvesting my juicy dividends.

Cliffdarcy owns shares of GlaxoSmithKline. 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

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

From hero to zero: are Lloyds shares a ticking time-bomb after a 70% gain in 2025?

In 2025, Lloyds shares have produced around 10 years’ worth of average stock market gains. Could they be heading for…

Read more »

Young female business analyst looking at a graph chart while working from home
Investing Articles

Which stock market is best: the UK or US? Here’s how British investors can benefit regardless

Stock market diversification helps spread risk and capitalise on growth and income. Mark Hartley considers the options for British investors.

Read more »

Exterior of BT Group head office - One Braham, London
Investing Articles

Will the epic BT share price surge 77% in 2026?

BT's share price is tipped to rise next year. Discover what could drive the FTSE stock higher -- and what…

Read more »

Friends at the bay near the village of Diabaig on the side of Loch Torridon in Wester Ross, Scotland. They are taking a break from their bike ride to relax and chat. They are laughing together.
Investing Articles

I asked ChatGPT for 5 world-class UK stocks for a retirement portfolio. Here’s what it gave me

Searching for top-quality UK stocks for a retirement portfolio? Here are some names that the world's most popular generative AI…

Read more »

Happy male couple looking at a laptop screen together
Investing Articles

I just asked ChatGPT a really stupid question about FTSE 100 stocks and it said…

Harvey Jones insulted artificial intelligence by asking it a very basic question about which FTSE 100 stocks to buy and…

Read more »

Road trip. Father and son travelling together by car
Growth Shares

The share price of my favourite FTSE 100 growth stock can’t stop falling. Time to buy?

Paul Summers loves the near-monopoly this FTSE 100 company enjoys. But he's also concerned its shares have tumbled over 20%…

Read more »

UK coloured flags waving above large crowd on a stadium sport match.
Dividend Shares

Shock news: over 1 year, the FTSE 100 is beating the S&P 500!

For most of the last 15 years, the US S&P 500 index has thrashed the UK's FTSE 100. However, this…

Read more »

Aerial shot showing an aircraft shadow flying over an idyllic beach
Investing Articles

Why are investors flooding into IAG shares this week?

In the last week, investors have been snapping up IAG shares like there's no tomorrow. What could have sparked the…

Read more »