Teleperformance SE shares plunged Wednesday after a statement from Swedish fintech Klarna rekindled concern that artificial intelligence will hurt the French company’s call-center business.Buy-now-pay-later lender Klarna said its AI assistant, powered by OpenAI, is doing the equivalent work of 700 full-time agents and has had 2.3 million conversations, equal to two-thirds of the company’s customer service chats, within the first month of being deployed. The AI tool resolved errands much faster a...