Lower oil and gas prices, weaker refining and chemicals margins and “challenging” economic conditions almost halved Royal Dutch Shell’s fourth­ quarter profits and forced the energy major to slow the pace of its share buyback programme. The Anglo-Dutch company said net income adjusted for cost of supply – its preferred profit measure –   fell to $2.9bn in the three months to  December This compares with $5.7bn in the same period a year ago and is below analysts’ consensus forecasts of $3.2bn. Full-year earnings for 2019 fell 23 per cent to $16.5bn. The group’s shares fell 3.3 per cent in early London trading.

Shell said on Thursday that it would slow investor payouts. It now plans to buy back $1bn of shares in the next quarter compared with $2.8bn in the fourth quarter of 2019. In 2018, it launched a $25bn buyback programme, which it had promised after its $54bn acquisition of BG Group in 2016 with a plan to complete it by the end of 2020. While Shell has made $15bn of share repurchases, chief executive Ben van Beurden noted a “challenging”economy and said the pace of buybacks “remains subject to macro conditions and further debt   reduction”.

Earnings at the gas business fell 47 per cent to $1.9bn after higher trading activity failed to offset lower prices. The group’s exploration and production division reported a loss of $787m, compared with a profit of $1.6bn in the same quarter a year ago, because of lower oil prices, decommissioning costs and write-offs related to its business in Albania.

Shell reported production of 2.8m barrels of oil equivalent a day in the fourth quarter, in line with the same period a year ago. The downstream refining and chemicals business reported earnings down 64 per cent to just over $1bn as weaker margins hit profits. Shell had warned in December about “materially lower” margins amid a weaker global economy. Cash flow from operations fell 53 per cent to $10.3bn in the fourth quarter compared with a year ago. Free cash flow, which enables the company to pay for dividends and share buybacks, dropped from $16.7bn to $5-4bn over the period.