Global shares mostly drop amid Iran war worries and surging oil prices

Global shares traded mostly lower Tuesday as optimism encouraged by a record rally on Wall Street clashed with anxiety about surging oil prices and a possible AI bubble. Britain's FTSE 100 shed 0.5% to 10,219.65. “Global equities remain dangerously dependent on a tiny cluster of AI leaders, creating a rally structure that looks powerful on the surface but increasingly fragile underneath,” said Stephen Innes, analyst with SPI Asset Management.