Global chipmakers add $200 billion in record rally on AI frenzy

Global chipmakers saw their market value soar as investors rushed to get exposure to artificial intelligence, the latest sign of a frenetic bull run that is pushing tech stocks to all-time highs.The sector is being swept up by a wave of good news from AI companies, including ChatGPT-owner OpenAI’s record $500 billion valuation on an employee share sale and its pacts with a group of South Korean chipmakers, as well as a report that Intel Corp. is in talks to add Advanced Micro Devices Inc. as a customer.The ...