Stock market crash part II: 3 FTSE 100 shares I’d buy in a Stocks and Shares ISA as the economy sinks

Looking to go shopping on the FTSE 100? Royston Wild reveals three top UK shares he thinks are great buys despite the economic downturn.

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.

Sure, another stock market crash could be just around the corner. But it hasn’t stopped me from buying UK shares in recent weeks. In fact, I’ve a watchlist of top FTSE 100 shares I’ll be looking to buy should share prices collapse through the floor again.

Stock market crashes provide the means for you and I to build five-star stocks portfolios at little cost. Of course, FTSE 100 investors need to be careful before splashing the cash in times like these.  Market crashes often come when trading conditions for many companies have, or are about to, deteriorate significantly.

Get protected!

But stock pickers can take precautions to protect themselves in times like these. They can do a little digging to find FTSE 100 shares with strong balance sheets, for example. These are essential when the threat of a painful and prolonged economic downturn emerges.

Image of person checking their shares portfolio on mobile phone and computer

They can pick FTSE 100 stocks with what billionaire investor Warren Buffett calls economic moats, or what the most of know simply as competitive advantages. That can come in the form of cutting-edge products, significant brand power, broad geographic footprints, or low cost bases for example.

Buying companies with defensive operations like utilities, telecoms providers, food producers and general insurance suppliers is another good idea. Profits here tend to remain stable whatever the broader economic landscape is like.

And finally, stock investors can pick up UK shares that trade on low valuations, like bargain-basement price-to-earnings (P/E) ratios of around 10 times and below. These sort of ratings tend to bake in the possibility of earnings projections taking a whack. And so they offer investors a wide margin of safety and can protect them from severe share price drops.

3 FTSE 100 heroes on my radar

With all this in mind, let me reveal three FTSE 100 shares I’d buy for my Stocks and Shares ISA today:

  • BAE Systems is a great stress-free FTSE 100 share for many reasons. It offers a wide range of market-leading technologies to armed forces across the globe. It trades on a low forward P/E ratio of just 12 times. And finally, investors can take confidence from the fact that global defence budgets remain robust during economic upturns and downturns.
  • Reckitt Benckiser, meanwhile, can rely on the exceptional brand power of its products to keep driving profits higher. But goods like Dettol disinfectant, Nurofen painkillers and Finish dishwasher tablets provide an extra protective blanket for FTSE 100 investors. They are essential product categories that therefore don’t fall out of favour when broader consumer spending power sinks.
  • DS Smith is a UK share I already own in my ISA. And its low forward P/E ratio of 12 times is tempting me to buy even more. It is a major supplier of essential packaging to fast-moving consumer goods companies like Reckitt Benckiser. But this isn’t the only reason I reckon this FTSE 100 share should thrive. Its growing focus on e-commerce will allow it to capitalise spectacularly on the exciting online shopping phenomenon too.

Royston Wild owns shares of DS Smith. The Motley Fool UK has recommended DS Smith. 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

Sunrise over Earth
Investing Articles

Meet the ex-penny share up 109% that has topped Rolls-Royce and Nvidia in 2025

The share price of this investment trust has gone from pennies to above £1 over the past couple of years.…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

1 of the FTSE 100’s most reliable dividend stocks for me to buy now?

With most dividend stocks with 6.5% yields, there's a problem with the underlying business. But LondonMetric Property is a rare…

Read more »

Investing Articles

Is 2026 the year to consider buying oil stocks?

The time to buy cyclical stocks is when they're out of fashion with investors. And that looks to be the…

Read more »

ISA coins
Investing Articles

3 reasons I’m skipping a Cash ISA in 2026

Putting money into a Cash ISA can feel safe. But in 2026 and beyond, that comfort could come at a…

Read more »

US Stock

I asked ChatGPT if the Tesla share price could outperform Nvidia in 2026, with this result!

Jon Smith considers the performance of the Tesla share price against Nvidia stock and compares his view for next year…

Read more »

Investing Articles

Greggs: is this FTSE 250 stock about to crash again in 2026?

After this FTSE 250 stock crashed in 2025, our writer wonders if it will do the same in 2026. Or…

Read more »

Investing Articles

7%+ yields! Here are 3 major UK dividend share forecasts for 2026 and beyond

Mark Hartley checks forecasts and considers the long-term passive income potential of three of the UK's most popular dividend shares.

Read more »

Hand is turning a dice and changes the direction of an arrow symbolizing that the value of an ETF (Exchange Traded Fund) is going up (or vice versa)
Investing Articles

2 top ETFs to consider for an ISA in 2026

Here are two very different ETFs -- one set to ride the global robotics boom, the other offering a juicy…

Read more »