Teradyne is trading 5.9% lower at $339.88 as semiconductor stocks face pressure from concerns about AI-infrastructure spending and hotter U.S. inflation reviving rate-hike fears. - Losses extend declines from recent sessions; Bloomberg-reported market coverage described the selloff as global, citing AI-return concerns and inflation-driven rate expectations. - On October 15, no clear company-specific catalyst was identified. Teradyne had announced its third-quarter results date, but no new result or guidance change explained the move; volume data was not provided.