Shares of Teradyne declined in post-market trading on Tuesday after it warned of weaker demand for some systems and forecast another drop in revenue. The stock TER, -1.40% was down 7.3% to $97.00 in after-hours trading, and lost 1.4$104.59 at the close. Shares are down 2.8% in the past year. The automatic testing-equipment maker said it expects first-quarter revenue of $540 million to$590 million, a fall of about 4.5% to 12.5% from the same period a year earlier. Analysts polled by FactSet exp ...