SEOUL, Dec 5 : Artificial intelligence stocks could come under pressure after rising too fast and too much, but the industry is not in a bubble, the head of South Korean conglomerate that owns leading memory chipmaker SK Hynix said. Concerns about lofty AI stock valuations have begun to weigh on broader financial markets, while there are questions about when huge AI investments will translate into actual profits. "I don’t see a bubble in (the AI industry)," SK Group chairman Chey Tae-won said