The FTSE 100 tracks the performance of the the 100 largest companies on the London Stock Exchange. That includes mining firms Antofagasta, Rio Tinto and Peers Endeavour which have been boosted by surging metals prices.
Defence firms also performed strongly, with Bae Systems, Babcock and Rolls-Royce all saw their value increase, as did large banks, including Lloyds, Barclays, Standard Chartered and HSBC.
Dan Coatsworth, head of markets at AJ Bell, said: “This is a historic moment and already makes 2026 one of the most significant years for the blue-chip index since its launch in 1984.”
He said crossing the 10,000-point threshold was “the best New Year’s present Chancellor Rachel Reeves could want”.
“The FTSE 100’s achievements just go to show what’s possible when buying UK shares.
“It also proves to cynics that the UK market is not stuck in the mud, and that the US stock market is not the only place to make money.