Why the pound and the FTSE 100 are set to sink if Jeremy Corbyn wins the election

A Labour victory could create uncertainty for the FTSE 100 (INDEXFTSE:UKX) and for sterling.

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.

While a Labour victory in the General Election may still be highly unlikely, there has been a clear surge in support for Jeremy Corbyn in recent weeks. The Labour party has been able to narrow the Conservative party’s lead significantly, with YouGov now forecasting a hung parliament.

Therefore, if Labour’s momentum continues into Thursday’s election, the party could gain a considerable number of seats. While this may be viewed as a positive event by many voters in the UK, investors may think otherwise.

Sterling

Perhaps the most obvious impact of a strong result or even a victory for Labour could be a decline in the value of sterling. While many of Labour’s policies may prove to be successful in the long run, ultimately they represent a major change from the status quo. For example, Jeremy Corbyn plans to nationalise a number of industries, including energy suppliers and rail companies. This could create a significant amount of uncertainty and even fear among investors, as they look ahead to which other companies and industries could become state-owned.

The Labour party is also seeking to change tax rates. While they may only effect top earners directly, increases to corporation tax could lead to lower business confidence in future. The UK’s status as a popular place for international companies to do business may come under pressure, which could lead to further downgrades in the UK’s economic outlook.

Just as the aftermath of Brexit saw a weaker pound emerge, a Labour victory could do likewise. That’s not because the policies they are seeking to adopt will necessarily be unsuccessful in achieving their objectives, but rather because they represent change. Investors have historically been averse to major change.

FTSE 100

The effect on the FTSE 100 of a strong Labour result or even victory in the upcoming election is possibly less clear than for sterling. One the one hand, increased uncertainty and fear among investors could cause sentiment towards UK-focused stocks to come under pressure. However, on the other hand a depreciation of the pound could lead to rising profitability and share prices for international companies which report in sterling.

Overall, though, the decline in investor sentiment is likely to more than offset the gains made by a possible depreciation of sterling. Although the FTSE 100 is made up of international companies, many of its incumbents still rely on the UK for a sizeable part of their sales and profitability. Furthermore, if business confidence in the UK falls after the election result, it could lead to a knock-on effect in Europe and the rest of the world at a time when risks to world growth are already high.

Looking ahead

While a Labour victory may be unlikely, a strong campaign by Jeremy Corbyn has made the outcome of the election harder to predict. A good performance by Labour could lead to falls for the FTSE 100 and for sterling, which may create significant uncertainty for investors in the short run. However, while this may be a challenging period, it could present a buying opportunity for investors who can focus on company fundamentals, diversity and, most importantly, the long run.

More on Investing Articles

Investing Articles

Down 35% in 2 months! Should I buy NIO stock at $5?

NIO stock has plunged in recent weeks, losing a third of its market value despite surging sales. Is this EV…

Read more »

Two employees sat at desk welcoming customer to a Tesla car showroom
Investing Articles

Could 2026 be the year when Tesla stock implodes?

Tesla's 2025 business performance has been uneven. But Tesla stock has performed well overall and more than doubled since April.…

Read more »

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Investing Articles

Could these FTSE 100 losers be among the best stocks to buy in 2026?

In the absence of any disasters, Paul Summers wonders if some of the worst-performing shares in FTSE 100 this year…

Read more »

Midnight is celebrated along the River Thames in London with a spectacular and colourful firework display.
Investing Articles

Up 184% this year, what might this FTSE 100 share do in 2026?

This FTSE 100 share has almost tripled in value since the start of the year. Our writer explains why --…

Read more »

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

You can save £100 a month for 30 years to target a £2,000 a year second income, or…

It’s never too early – or too late – to start working on building a second income. But there’s a…

Read more »

Hydrogen testing at DLR Cologne
Investing Articles

Forget Rolls-Royce shares! 2 FTSE 100 stocks tipped to soar in 2026

Rolls-Royce's share price is expected to slow rapidly after 2025's stunning gains. Here are two top FTSE 100 shares now…

Read more »

Road 2025 to 2032 new year direction concept
Investing Articles

Brokers think this 83p FTSE 100 stock could soar 40% next year!

Mark Hartley takes a look at the factors driving high expectations for one major FTSE 100 retail stock – is…

Read more »

Investing Articles

I asked ChatGPT for the best FTSE 100 shares to consider for 2026, and it said…

Whatever an individual investor's favourite strategy, I reckon there's something for everyone among the shares in the FTSE 100.

Read more »