Teradyne is trading at $227.40 (+6.89%) in pre-market, appearing to reflect a sector rebound after the November 5 sell-off rather than a fresh company-specific catalyst. - Reuters reported chip stocks gained ground pre-market following the technology-led rout, with several major chipmakers rising 5% to 8.3%. - The supplied sector context also points to a broad bounce. - Teradyne’s latest earnings were reported October 27; no new company-specific announcement explaining the move was found.