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IBM shares plunged more than 20% on Tuesday, wiping over $50bn from its market value in the biggest one-day selloff since the 1987 crash, after the tech giant warned customers were diverting spending …

Samsung Electronics reported a 19-fold jump in quarterly profit, but its stock fell up to 10% as investors took profits from the AI-fueled rally, dragging down other chip stocks like Micron, Sandisk, …