The sell-off for winners of the artificial-intelligence boom deepened and yanked stock markets lower worldwide while tensions escalated in the Middle East as the US launched more airstrikes at Iran in response to the killing of American troops.

US stock market today: Fresh selling in computer chipmakers and other companies that have benefited from the artificial intelligence boom dragged global equity markets lower on…

The rush late last week on Wall Street to dump chipmaker stocks – the so-called picks and shovels of the AI boom – has renewed fears of an investment bubble.

The sell-off for winners of the artificial-intelligence boom deepened and yanked stock markets lower worldwide while tensions escalated in the Middle East as the US launched more…