Teradyne is trading 5.59% lower at $281.62 in pre-market amid a semiconductor and technology selloff. - Reuters said weak reactions to Alphabet, Amazon and Intel results amplified doubts that heavy AI infrastructure spending will generate adequate returns, weighing on chip and technology markets. - Teradyne's latest quarter was strong, but Q4 revenue guidance of $1.25 billion-$1.35 billion was below Q3 revenue of $1.31 billion. - Projected non-GAAP EPS of $1.95-$2.25 trailed Q3's $2.29; available evidence points to sector pressure, not a new company-specific announcement.