French IT consulting firm Capgemini tightened its full-year revenue guidance on Wednesday, while citing caution amid soft demand and an uncertain economic environment. The firm, whose services range from cloud and AI to enterprise management across a wide array of industries, now estimates full-year revenue growth at constant currency in a range of -1 per cent to +1 per cent, compared to the previous estimate of between -2 per cent and 2 per cent. It also approved a multi-year share buyback