Is it boom time for the UK stock market now Boris Johnson has resigned?

Henry Adefope details how Boris Johnson’s departure could ignite a stock market rally that he does not want to miss out on this year.

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.

Smiling young man sitting in cafe and checking messages, with his laptop in front of him.

Image source: Getty Images

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 UK stock market, as well as the pound, immediately rallied after Boris Johnson’s resignation as UK Prime Minister. Analysts also note that in the three years of the PM’s reign, the FTSE 100 index was down about 300 points overall. Granted, these series of events could be incidental. But, I can’t help but feel Boris’ departure presents a good buying opportunity for me in the market right now. 

Are UK stock markets set to boom?

Since the start of the year, markets have been declining rather than growing.

In the UK, the FTSE 100 has fallen by 4% since the New Year, while the FTSE 250 has fallen to a greater extent, by 20%.

Companies in the FTSE 100 derive the lion’s share of their income from abroad. Therefore, I know this index is much more likely to react to global events. In contrast, the FTSE 250 index presents a more relevant picture of how domestically focused stocks are faring. It is in bear market territory currently. But, following news of the PM’s resignation last Thursday, it instantly jumped to a one-week high. 

Could FTSE 250 be the most likely to benefit? 

Whenever the stock market corrects itself downwards, I ask myself whether I can benefit from a reversal. I observed immediate stock market optimism following Johnson’s resignation. And I foresee a greater bounce for the stock market when the new PM is chosen.

I know from the history books that new Prime Ministerial appointments can make a difference to the stock market.

I will cite two examples. In 9 April 1992, John Major’s Tory government coasted to a landslide election win. And the stock market drove higher. The euphoria was short-lived, however. By that summer, the UK stock market, as well as the domestic currency, declined. Additionally, Tony Blair arrived in Downing Street in 1997 when a bull run was afoot. It continued until 2000. However, by the end of 2003, the UK stock market had lost almost all the ground it had made.

The common theme that I have deduced from these two events is that the national optimism following a major political event tends to be reflected in domestic share prices. At least in the short term, although I plan to hold any new investments for years to come rather than selling once I’ve made a small profit. 

How I plan to take advantage of stock market optimism 

My Stocks and Shares ISA portfolio has weathered some serious volatility so far this year, from soaring inflation and rising interest rates, to the war in Ukraine. I have noted a considerable decline in the value of my ISA as a result of this triple threat of variables.

I am focused on the long term, so you will not see me losing sleep because of these market headwinds. Nevertheless, I am also keen to take advantage of any tactical market opportunities that can help me to recoup my losses for the year so far.  

This is why I am bullish on the UK stock market in the short term, particularly the companies listed in the FTSE 250. I intend to load up on several domestic-focused value shares that can withstand inflation as the nation rides the wave of political hope and optimism in the search for the new PM, however short-lived this turns out to be.

Henry Adefope and The Motley Fool UK have 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

Stacks of coins
Investing Articles

Here are 7 FTSE 250 stocks to target an ISA income

Looking for the best dividend stocks to buy for 2026? Casting the net outside the FTSE 100 can turbocharge an…

Read more »

Investing Articles

£20k in an ISA? 7 dividend shares to target a £1,500 passive income in 2026

Looking for ways to make a passive income from a cash lump sum? Discover a portfolio of quality dividend shares…

Read more »

Night Takeoff Of The American Space Shuttle
Investing Articles

Will the battered Greggs share price rebound 59% in 2026?

Greggs' share price has dived to multi-year lows in 2025. But City analysts think its more recent price recovery will…

Read more »

Investing Articles

5 high-quality FTSE 100 stocks that bombed in 2025 but could rebound in 2026

These FTSE 100 shares have been some of the biggest losers in the index this year. Edward Sheldon sees recovery…

Read more »

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

These are the biggest dividend yields on the FTSE All Share Index as 2026 begins

Dr James Fox explains that large dividend yields can be a warning sign and investors need to look for signs…

Read more »

Investing Articles

Are BAE Systems shares the best UK industrials investment going into 2026?

Dr James Fox takes a closer look at BAE Systems shares and the alternatives following an impressive 2025 and as…

Read more »

Investing Articles

Is 2026 the year the Diageo share price bounces back?

Will next year be the start of a turnaround for the Diageo share price? Stephen Wright looks at a key…

Read more »

Investing Articles

Here’s my top FTSE 250 pick for 2026

UK investors looking for under-the-radar opportunities should check out the FTSE 250. And 2026 could be an exciting year for…

Read more »