Global stocks fell on Tuesday as technology shares slid despite blockbuster results from Samsung Electronics, with ?investors remaining concerned about the sustainability of the artificial intelligence (AI) driven rally, while oil prices rose on renewed Middle East tensions. Samsung Electronics forecast a 19-fold jump in April-June operating profit to 89.4 trillion ?won (€51 billion), a third straight quarter of record operating profit for the world’s largest memory-chipmaker.DublinShares in home builder Cairn rose by 0.8 per cent to €2.54 after the company said it recorded a 60 per cent rise in revenue to €450 million in the first half of the…