Teradyne is trading 12.4% up at $360.25 in after-hours trading, rebounding sharply from recent semiconductor sector weakness tied to AI spending concerns and competition in China.
- The recovery follows a heavy sell-off earlier on July 28, 2026, when chipmakers fell on worries regarding sustained AI infrastructure costs and rising Chinese rivals.
- After-hours price volatility has been amplified by thinner market liquidity following the broader sector downturn.