As the UK’s financial markets reel from a sudden outbreak of war in Iran, investors and everyday savers alike are facing a whirlwind of uncertainty. On April 5, 2026, the start of hostilities sent global stock markets into a tailspin, with the FTSE 100—the UK’s flagship index—briefly dipping into correction territory just a month earlier. The volatility has left many wondering: is this the calm before a bigger storm, or can the UK’s markets weather the turbulence?
According to reporting from The Motley Fool UK, the crisis in Iran has disrupted between 15% and 20% of the world’s oil and gas supply. This has sent energy prices soaring, with Britons already feeling the pain at the petrol pump. But the economic shocks don’t stop there. About a third of the global fertiliser supply has also been severely impacted—just as British farmers enter the crucial spring application period for winter cereals and the main planting season for vegetables. The timing, as many in the agricultural sector note, couldn’t be worse.
This dual blow to food and energy supply chains spells trouble for inflation, which had only recently shown signs of calming. Now, as price pressures mount, the spectre of a recession looms larger over the UK economy. Yet, as The Motley Fool UK points out, while the situation is fraught, it doesn’t guarantee a stock market crash. The FTSE 100, in particular, is considered relatively insulated thanks to its heavy weighting toward recession-resistant sectors such as energy, mining, defence, and healthcare. Many of these companies also derive a significant portion of their earnings from international markets, giving them a buffer against domestic shocks.
Still, even a correction—rather than a full-blown crash—can be painful for investors. So, what are the experts doing to protect their portfolios? Institutional analysts are doubling down on diversification and sticking to strict risk-tolerance limits. They’re also hunting for buying opportunities amid the chaos. Unilever, for example, has emerged as a defensive favourite. The consumer goods giant is busy transforming its product portfolio and boosting operational savings, even as it copes with the UK’s cost-of-living crisis. With a recent hiring freeze and tighter spending, Unilever’s management is aiming to bolster profit margins over the medium term.
JP Morgan’s analyst team recently reiterated its Buy recommendation for Unilever, setting a share price target of 5,700p. That implies a potential 36% upside from current levels, even with the current macroeconomic headwinds. However, as The Motley Fool UK cautions, executing a large-scale transformation during an economic wobble is no small feat. Pulling back on spending could make it harder to hit earlier growth targets. Nevertheless, for those seeking shelter from wider market volatility, Unilever shares, while not risk-free, may be worth considering.
Meanwhile, British savers have their own deadline to contend with. April 5, 2026, also marked the end of the tax year—and the last chance to take advantage of the £20,000 annual Stocks and Shares ISA limit. The ISA, now in its 27th year, has allowed holders to enjoy all income and capital gains tax-free. And the numbers are, frankly, astonishing. A Freedom of Information request revealed that there are 3,080 ISA millionaires in the UK. The 25 largest ISAs boast an average value of £10.98 million. If such a sum were invested in the FTSE 100, which currently yields 2.81%, it would generate a staggering £308,538 in annual dividend income.
But that’s just the start. The FTSE 250 is offering a dividend yield of 3.4%, and there are 79 stocks on the FTSE 350 yielding 5% or more. The top 10 FTSE 100 stocks yield 7%, which would generate £768,600 on a £10.98 million ISA. For those with more modest ambitions, investing £20,000 annually in an ISA could grow to over £1.1 million in 20 years, assuming a 9% growth rate. Of course, as The Motley Fool UK reminds readers, tax treatment depends on individual circumstances and may change in the future, so professional advice is always recommended.
Exceptional returns like these may sound out of reach, but history offers some inspiration. Tech giants such as Microsoft, Amazon, and Apple have created countless millionaires among their shareholders. Nvidia, in particular, stands out: analysis suggests that 27,000 of its workforce have become millionaires, largely through stock options. The company is now considered integral to the ongoing artificial intelligence revolution, which the World Economic Forum predicts could contribute up to 14%—or $15.7 trillion—to global GDP by 2030.
Yet, even Nvidia isn’t immune to the current geopolitical and economic headwinds. The war in the Middle East could disrupt some of the anticipated growth for AI. The region, with its cheap energy and abundant land, is an ideal location for data centres. Saudi Arabia, the United Arab Emirates, and Qatar are investing heavily in this area. However, higher interest rates—driven by rising inflation—could make constructing these data centres more expensive, potentially slowing sector growth and impacting Nvidia’s bottom line.
Despite these concerns, Nvidia’s stock remains highly regarded by analysts. It’s currently trading at about 24 times forward earnings—a valuation that’s considered cheap for a high-growth tech stock. According to The Motley Fool UK, 69 out of 70 brokers covering the company recommend buying its shares, and analysts believe it’s 60% undervalued. While a modest investment in Nvidia today may not make someone an overnight millionaire, its critical role in AI, robust pipeline of new products, and high profit margins suggest its share price could continue to grow steadily.
Back in the UK, the war’s impact on global shipping lanes has added another layer of complexity. On April 2, 2026, Iran offered transit access through the Strait of Hormuz—a waterway it had effectively shut down since early March following joint US-Israeli strikes on Tehran. This offer, broadcast on Iranian state television, could provide Europe and other regions with a crucial lifeline for energy supplies, but the price may be steep. Negotiations are ongoing, and the outcome could shape global energy markets for months to come.
For now, British investors and savers are left to navigate a landscape marked by volatility, opportunity, and risk. Defensive stocks like Unilever and potential high-growth plays like Nvidia offer some hope, but the broader economic picture remains uncertain. As the tax year closes and the world watches events in the Middle East unfold, the only certainty is that vigilance and adaptability will be more important than ever for those seeking to protect—and grow—their wealth.