Teradyne stock heads into the open after an 13.3% slide

At the close on September 14, 2026, Teradyne stock finished the Nasdaq session at USD 329.20, down 13.3 percent from the prior close. The shares saw heavy trading and underperformed the broader tech benchmarks as artificial intelligence sentiment cooled.

Teradyne stock closed at USD 329.20 on the Nasdaq on September 14, 2026, losing 13.3 percent from its prior close as a sharp pullback ended a recent winning streak. The move left the shares well below their 52-week high and marked a notable reversal after gains earlier in the month.

September 14, 2026 in numbers

Teradyne Inc. (ISIN US8807701029, Nasdaq: TER) finished the last completed session on September 14, 2026 at USD 329.20, down USD 50.52 or 13.3 percent compared with the previous Nasdaq close, according to market data for that date. In the same report, the intraday trading range showed the shares slipping from an opening gap near USD 347 to a low closer to the final print, with the close reinforcing the downward pressure after a four-session run higher ended.Seeking Alpha reported on September 14, 2026 that the stock slid 13 percent as traders took profits following the recent advance, noting that the close at USD 329.20 represented a drop of USD 50.52 from the prior close.

According to a session wrap by Yahoo Finance on September 15, 2026, Teradyne shares at USD 335.68 remained 30.6 percent below a 52-week high of USD 483.84 from June 2026, underscoring the scale of the recent correction relative to their earlier peak. While the broader Nasdaq benchmarks also weakened during the latest session, Teradyne underperformed the composite index, which fell around 0.6 percent as technology names faced pressure from cooling artificial intelligence enthusiasm.AP noted that the Nasdaq Composite closed lower on September 14, 2026, highlighting that sector-wide weakness added to the pressure on individual semiconductor and testing equipment names.

Today’s outlook for Teradyne

Looking ahead to today’s US session on September 15, 2026, investors in Teradyne are watching broader technology sentiment and semiconductor peer performance after the sharp drop in the previous session, with cooling enthusiasm around artificial intelligence and related hardware cited as a headwind for growth-oriented names in market commentary.The Motley Fool described on September 14, 2026 how warnings about the sustainability of artificial intelligence spending weighed on major tech and chip stocks, a backdrop that could remain relevant for Teradyne today. No company-specific earnings release or scheduled event for Teradyne within the next few trading days appears in available calendars, so today’s trading will likely be driven mainly by sector moves, macro news such as rate developments, and any fresh analyst commentary on semiconductor and test equipment providers.