You might expect the £219 million Guinness Sustainable Energy Fund to have performed poorly in recent years, given the dreadful performance of renewable-energy infrastructure funds. Far from it: the fund returned 18% in 2025 after losing 17% in the previous three years, but returning 150% in the three before that.
That is because its portfolio is much broader. While the renewable infrastructure funds invest in just a few energy-generation projects, the Guinness Sustainable Energy Fund is spread across quoted companies in the equipment, efficiency, electric vehicles, power generation, batteries and infrastructure sectors.
Last year's returns were due to improving policy clarity, lower interest rates and surging power demand, not just from data centres and digital infrastructure but also from transport, building, industry and the re-shoring to the US of manufacturing, says co-manager Jonathan Waghorn. “Global investment in clean energy in 2025 was $2.2 trillion, twice as much as in fossil fuels, reflecting the fact that renewable energy is the cheapest form of electricity in most situations,” he notes. “Growing power demand has taken over from decarbonisation as the central secular theme.”
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Capitalise on the rising demand for electricity
The International Energy Agency forecasts that electricity demand will grow at 3.7% in 2026 – well above the 2015-2023 average of 2.6% – and at 4% per annum thereafter. AI and data centres currently account for 4%-5% of US power demand, but this will grow to around 12% by 2030. Electric vehicle (EV) sales are expected to increase by 4 million to 25 million in 2026 (when they will make up 29% of total sales). Battery prices fallen 93% since 2010, but are likely to drop significantly further by the 2030s. In China, which accounts for 60% of global sales, EV sales are already over half the total. In the US, they are just 10% (against 20%-25% in Europe) due to cheap gasoline and range anxiety in a country where driving distances are longer, but this is expected to increase to 45% by 2030. Policy support has been inconsistent but changes in Donald Trump's “One Big Beautiful Bill Act” last year were not as adverse as many feared.
China added 430GW of renewable capacity in 2025, more than the rest of the world put together, and hit its 2030 target six years early. Approvals for new coal-powered plants have slowed – Waghorn says that global coal-fired generation is at a peak and expects it to halve by 2050. He expects gas-fired generation to continue to grow until 2040, then decline slightly. Renewable energy's market share of energy demand will increase from 15% to 40% as electricity's share of total energy increases from 25% to 40% in 2045.
“Given the growth in electricity demand, it is no longer about renewables or fossil fuels, but about both,” says Waghorn. “Not only is renewable capacity cheaper but costs are falling and lead times for installation are shorter than for gas, whose costs are rising. Gas-fired generation will still have a very important role, providing base load capacity and smoothing out the intermittency of renewable energy. Nuclear power will be slower to expand as expertise needs to be built up.”
“There is significant scope for energy efficiency gains, enabling overall demand growth to slow from 2% to 1% per annum long term.” Growth in electricity demand requires a doubling in expenditure to $600 billion per annum by 2030 and a further increase to $800 billion by the 2040s. “Much of the Western world's power grid is 40-50 years old, and over half of US grid transformers are 30 years old. Estimates point to a doubling of the global power grid by 2040.”
All this adds to the investment opportunity, reflected in the breadth of the fund's portfolio. It makes the funds focused solely on renewable energy projects – with high sunk costs and facing falling wholesale prices – look stuck up a cul-de-sac. Despite this, the portfolio still trades on a 12% discount to the broader market – with higher earnings growth, estimated at 12.7% per annum in 2024-2027 and above that of global markets, there is surely plenty more upside to go for.
An energy fund for a world that still needs oil
The oil and gas sector was a popular contrarian tip for 2026, largely because it had performed so poorly for so long. With the Brent oil price stuck at $65 a barrel, the dollar weakening, demand weak and plenty of potential additional supply visible, the argument for the sector did not look compelling. Yet the Gulf war changed all that, with the oil price surging to over $100 a barrel. Oil and gas companies are back in favour, with the Guinness Global Energy Fund returning 41% in sterling in the first quarter. So is it too late to jump in?
Oil looks expensive relative to recent prices but it was a “cheap commodity and at a 100-year low relative to the gold price”, says co-manager Will Riley. “The world was paying just 2% of GDP for its oil compared with a 30-year average of 3%, and 5% in 2012.”
The International Energy Agency has reduced its estimate for growth in demand from 0.73 million barrels per day (bpd) in 2026 to an average fall of 80,000 bpd. In the longer-term, oil demand, which stood at 104 million bpd in 2025, was previously forecast to peak at 107 million bpd in the 2030s. That peak may be brought forward if higher prices now provide an incentive to shift from oil at the margin, but demand is expected to decline only slowly.
The closure of the Strait of Hormuz theoretically prevents 20 million bpd of oil and 10-11 billion cubic feet of gas per day reaching markets. Alternative pipelines can transport some of this oil, but only some. While high prices will stimulate new investment – both in new production and new transport infrastructure – that will take time. There is no simple alternative to replace Qatar's 20% of global liquefied natural gas (LNG) production, for example. On a longer time scale, there is potential for additional oil and gas supply around the world, which can partly offset the depletion of existing fields. This includes Venezuela, which has the world's largest oil reserves and whose heavy (and costly to extract) crude has a breakeven point of at $80 a barrel, estimates consultancy Wood Mackenzie. However, “under-investment, infrastructure decay, sanctions and loss of technical capacity will take years to rebuild even if political stability and foreign investment returns”, notes Riley.
The Guinness Global Energy Fund had returned a respectable 9% in sterling last year, before oil prices rose – comfortably ahead of the sector, though it had lagged badly over five and ten years. This explains why the fund had shrunk to £125 million, though it is now up to £240 million. Last year's performance was driven by the focus of companies on cash flow and returns on capital, says Riley. Integrated European majors, notably BP and Shell, have been good performers “as they tilted away from renewable energy to fossil fuels”. Canadian companies have also done well as the government U-turned towards fossil fuels.
At the start of the year, the Guinness Global Energy Fund portfolio was trading on a trailing price/earnings (p/e) ratio of 12.8, a 40% discount to global equities, with little prospect of growth in earnings and cash flow if prices remained flat. However, an $80-$90 Brent oil price will add 65% to earnings, says Riley. Even after recent share-price gains, that will bring the fund's p/e ratio back down to about 13 times, compared with a long-run average of 15. Rising earnings also enable firms to pay down debt while distributing higher dividends, making share buybacks and still funding more investment.
The crucial consequence of the Middle East crisis is that the world has been reminded of the risks of supply disruption. This is likely to result in significant investment in new production to reduce dependence on the Gulf, actively encouraged by governments. That is good news for oil and gas companies with the necessary capital and expertise. Professional investors, who neglected the sector for so long, will be looking for an opportunity to invest. So should retail investors.
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