GET DAILY SIGNALSTeradyne (TER) Shares Slide -23.8% in 30 Days After Strong Q3 Results
Key Takeaways
- Teradyne shares declined roughly 23.8% over the past 30 days, falling from a closing price of $401.30 on September 28 to about $305.82 in late-October trading.
- The selloff accelerated on October 22, when TER dropped 10.8% in a broad Nasdaq retreat as investors repriced AI-infrastructure spending and high-valuation growth stocks.
- Despite the slide, Teradyne's Q3 2026 results (reported October 27) beat consensus, with revenue of about $1.31 billion (up roughly 70% year over year) and adjusted EPS of $2.29.
- Guidance pointed to decelerating growth — Q4 revenue at a midpoint near $1.30 billion, roughly flat sequentially — and shares slipped in after-hours trading following the report.
- A stretched valuation (trailing P/E in the low-40s versus a mid-30s five-year median) left little room for disappointment after a strong run earlier in 2026.
- For additional detail on this ticker, explore its Price Targets, Earnings, and Forecast pages.
Teradyne's Business and Market Position
Teradyne, Inc., headquartered in North Reading, Massachusetts, supplies automated test equipment for semiconductors and electronics. Its systems handle logic, mixed-signal, RF, memory, and system-level testing for foundries, fabless chipmakers, and integrated device manufacturers. The company also runs an advanced robotics segment through Universal Robots and Mobile Industrial Robots, focused on manufacturing and warehouse automation. Semiconductor test made up roughly 82% of third-quarter revenue, which positions TER as a direct beneficiary of AI-driven demand for memory, high-bandwidth interconnect, and compute chips. I also checked this using Tickeron’s AI Screener to see how the stock compares to others in the industry.
Stock Price Performance Over the Last 30 Days and Quarter
Over the last 30 days, TER declined about 23.8%, moving from a $401.30 close on September 28 to roughly $305.82. The pullback was steepest in the second half of October: after closing at a recent high of $449.04 on October 2, the stock gave back nearly a third of its value as selling pressure intensified. Over the trailing three months, the picture is choppier — from a late-July close near $320.65, TER is down only about 5%, but that headline figure masks a sharp early-October rally followed by a rapid reversal. The stock remains well below the 52-week high near $488 set earlier in 2026.
What Drove the 30-Day Decline
The 30-day decline had three main drivers. First, a broad technology selloff on October 22 hammered semiconductor-equipment names: the Nasdaq Composite fell 2.3% and TER dropped 10.8% as concerns mounted around AI capital-expenditure sustainability and elevated valuations across the sector. Second, Teradyne's Q3 report on October 27 — while beating estimates on revenue and adjusted EPS — signaled slower momentum ahead, with fourth-quarter revenue guided to a midpoint near $1.30 billion, roughly flat versus Q3. Shares fell in after-hours trading as investors focused on decelerating growth and a rise in inventory days outstanding to 98 from 69 the prior quarter. Third, the stock entered October trading at a rich multiple after a powerful 2026 run, leaving limited upside cushion once sentiment toward AI-linked chip names cooled.
Performance Over the Last Quarter and Sector Context
The broader quarterly trend reflects a market that had already priced in much of Teradyne's AI-driven growth. Early in the quarter, shares climbed to an October 2 closing high of $449.04 as demand for memory and interconnect testing stayed robust. That strength then collided with a sector-wide repricing of AI-infrastructure valuations, dragging peer equipment makers such as Lam Research and KLA lower alongside TER. While Teradyne's fundamentals remained strong — Q3 revenue grew about 70% year over year and the robotics unit reached profitability — the stock's premium valuation meant confirmation of strong results was not enough to sustain gains, and shares retraced most of their early-quarter advance.
Key Drivers to Watch Going Forward
Looking ahead, investors will monitor whether fourth-quarter guidance is delivered as expected and whether order momentum in memory and high-bandwidth interconnect testing continues. AI capital-expenditure trends among hyperscalers remain a central swing factor, given the concentration of Teradyne's recent growth in AI-linked demand. The trajectory of inventory levels, robotics segment profitability, and the competitive landscape in test equipment will also be closely watched. Macroeconomic conditions, including interest rates and broader risk appetite for growth stocks, could continue to influence valuation. As always, past performance does not guarantee future results, and investors should conduct their own research before making decisions.
Using AI Tools to Track Market Moves
In my own analysis, I often review Tickeron’s Trending AI Robots to see how automated strategies are performing on names like TER. The page highlights bots with strong recent results across different timeframes and risk levels, which gives me a practical way to compare approaches without building everything from scratch. It serves as a useful reference when evaluating how systematic models are handling volatility in the semiconductor sector right now.
Disclaimer
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Contributor
Sergey Savastiouk, Ph.D. has a degree in Applied Mathematics from Moscow University and has extensive experience as an entrepreneur, investor, manager, and mathematician. His professional expertise is in applied mathematics, mathematical modeling, system and pattern analysis, and software and hardware system integration. He has served as the CEO of several hi-tech start-up companies and nonprofit organizations, which has given him proven capabilities in business strategy for high-tech start-up companies, market assessment, company formation, team building, product development, marketing, and sales. He has published numerous articles in journals and magazines on related fields. As a retail investor, he spent 15 years developing his proprietary trading and quantitative algorithms (now Tickeron’s A.I.), which brought him significant returns in trading the stock market. His current work and goal in founding Tickeron is to bring professional, sophisticated stock market analysis capabilities to retail investors via an easy-to-use interface.
TER in upward trend: price may ascend as a result of having broken its lower Bollinger Band on October 15, 2026
TER may jump back above the lower band and head toward the middle band. Traders may consider buying the stock or exploring call options. In 35 of 37 cases where TER's price broke its lower Bollinger Band, its price rose further in the following month. The odds of a continued upward trend are 90%.
Technical Analysis (Indicators)
Bullish Trend Analysis
The RSI Oscillator points to a transition from a downward trend to an upward trend -- in cases where TER's RSI Indicator exited the oversold zone, 20 of 24 resulted in an increase in price. Tickeron's analysis proposes that the odds of a continued upward trend are 83%.
The Stochastic Oscillator shows that the ticker has stayed in the oversold zone for 11 days. The price of this ticker is presumed to bounce back soon, since the longer the ticker stays in the oversold zone, the more promptly an upward trend is expected.
Following a +4.80% 3-day Advance, the price is estimated to grow further. Considering data from situations where TER advanced for three days, in 254 of 315 cases, the price rose further within the following month. The odds of a continued upward trend are 81%.
The Aroon Indicator entered an Uptrend today. In 239 of 301 cases where TER Aroon's Indicator entered an Uptrend, the price rose further within the following month. The odds of a continued Uptrend are 79%.
Bearish Trend Analysis
The Momentum Indicator moved below the 0 level on October 12, 2026. You may want to consider selling the stock, shorting the stock, or exploring put options on TER as a result. In 65 of 89 cases where the Momentum Indicator fell below 0, the stock fell further within the subsequent month. The odds of a continued downward trend are 73%.
The Moving Average Convergence Divergence Histogram (MACD) for TER turned negative on October 12, 2026. This could be a sign that the stock is set to turn lower in the coming weeks. Traders may want to sell the stock or buy put options. Tickeron's A.I.dvisor looked at 49 similar instances when the indicator turned negative. In 38 of the 49 cases the stock turned lower in the days that followed. This puts the odds of success at 78%.
TER moved below its 50-day moving average on October 13, 2026 date and that indicates a change from an upward trend to a downward trend.
The 10-day moving average for TER crossed bearishly below the 50-day moving average on October 19, 2026. This indicates that the trend has shifted lower and could be considered a sell signal. In 12 of 14 past instances when the 10-day crossed below the 50-day, the stock continued to move higher over the following month. The odds of a continued downward trend are 86%.
Following a 3-day decline, the stock is projected to fall further. Considering past instances where TER declined for three days, the price rose further in 50 of 62 cases within the following month. The odds of a continued downward trend are 66%.
Fundamental Analysis (Ratings)
The Tickeron SMR rating for this company is 28 (best 1 - 100 worst), indicating very strong sales and a profitable business model. SMR (Sales, Margin, Return on Equity) rating is based on comparative analysis of weighted Sales, Income Margin and Return on Equity values compared against S&P 500 index constituents. The weighted SMR value is a proprietary formula developed by Tickeron and represents an overall profitability measure for a stock.
The Tickeron Profit vs. Risk Rating rating for this company is 38 (best 1 - 100 worst), indicating well-balanced risk and returns. The average Profit vs. Risk Rating rating for the industry is 72, placing this stock slightly better than average.
The Tickeron Seasonality Score of 41 (best 1 - 100 worst) indicates that the company is fair valued in the industry. The Tickeron Seasonality score describes the variance of predictable price changes around the same period every calendar year. These changes can be tied to a specific month, quarter, holiday or vacation period, as well as a meteorological or growing season.
The Tickeron Price Growth Rating for this company is 47 (best 1 - 100 worst), indicating steady price growth. TER’s price grows at a higher rate over the last 12 months as compared to S&P 500 index constituents.
The Tickeron PE Growth Rating for this company is 57 (best 1 - 100 worst), pointing to average earnings growth. The PE Growth rating is based on a comparative analysis of stock PE ratio increase over the last 12 months compared against S&P 500 index constituents.
The Tickeron Valuation Rating of 80 (best 1 - 100 worst) indicates that the company is slightly overvalued in the industry. This rating compares market capitalization estimated by our proprietary formula with the current market capitalization. This rating is based on the following metrics, as compared to industry averages: TER's P/B Ratio (14.723) is slightly higher than the industry average of (6.539). P/E Ratio (44.219) is within average values for comparable stocks, (92.867). Projected Growth (PEG Ratio) (0.734) is also within normal values, averaging (0.832). Dividend Yield (0.002) settles around the average of (0.008) among similar stocks. P/S Ratio (12.077) is also within normal values, averaging (27.093).
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General Information
an electronic test systems manufacturer
Industry ElectronicProductionEquipment
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