Does Teradyne (TER) stock go up or down depending on the month?
Teradyne month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +24.5% | +32.8% | -7.4% | +15.9% | +9.0% | +29.3% | -24.0% | |||||
| 2025 | -8.0% | -5.1% | -24.8% | -10.2% | +5.9% | +14.4% | +19.5% | +10.1% | +16.4% | +32.1% | +0.1% | +6.4% |
| 2024 | -11.0% | +7.2% | +8.9% | +3.1% | +21.2% | +5.2% | -11.6% | +4.2% | -2.0% | -20.7% | +3.6% | +14.5% |
| 2023 | +16.4% | -0.6% | +6.3% | -15.0% | +9.6% | +11.1% | +1.4% | -4.5% | -6.9% | -17.1% | +10.8% | +17.7% |
| 2022 | -28.2% | +0.4% | +0.3% | -10.8% | +3.6% | -18.0% | +12.7% | -16.1% | -11.2% | +8.3% | +14.9% | -6.5% |
| 2021 | -5.3% | +13.3% | -5.4% | +2.8% | +5.8% | +1.2% | -5.2% | -4.4% | -10.1% | +26.6% | +10.6% | +7.0% |
| 2020 | -3.2% | -11.0% | -7.8% | +15.5% | +7.2% | +26.1% | +5.3% | -4.5% | -6.5% | +10.6% | +25.6% | +8.7% |
| 2019 | +14.7% | +13.4% | -2.4% | +23.0% | -14.0% | +13.7% | +16.3% | -5.0% | +9.3% | +5.7% | +2.2% | +8.9% |
| 2018 | +9.5% | -1.0% | +0.7% | -28.8% | +16.5% | +0.4% | +13.6% | -4.8% | -10.2% | -6.8% | +3.6% | -12.1% |
| 2017 | +11.7% | +0.2% | +9.4% | +13.4% | +0.8% | -15.5% | +15.2% | +2.9% | +4.7% | +15.0% | -5.6% | +3.5% |
| 2016 | -6.0% | -1.8% | +13.2% | -12.4% | +4.8% | -0.6% | +0.3% | +6.6% | +2.5% | +7.9% | +4.7% | +4.2% |
| 2015 | -8.5% | +6.7% | -2.4% | -3.2% | +15.9% | -8.8% | -0.2% | -6.3% | -0.2% | +8.4% | +6.5% | -0.5% |
| 2014 | +6.8% | +7.8% | -1.9% | -11.2% | +0.7% | +10.1% | -7.0% | +13.0% | -5.8% | -5.1% | +7.9% | -0.3% |
| 2013 | +3.7% | -3.2% | +1.4% | +9.1% | -2.1% | -6.1% | -6.9% | +7.6% | +5.9% | -2.6% | +3.5% | |
| Average | +1.0% | +4.7% | -1.2% | -1.2% | +6.9% | +4.8% | +2.2% | -1.2% | -1.0% | +5.4% | +6.3% | +4.2% |
| % of years up | 46% | 64% | 43% | 50% | 93% | 64% | 57% | 38% | 38% | 69% | 85% | 69% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
Teradyne month by month: the summary
Over 2013-2026, here's what Teradyne (TER) stock did each month, on average: January +1.0% (up 46% of 13 years), February +4.7% (up 64% of 14 years), March -1.2% (up 43% of 14 years), April -1.2% (up 50% of 14 years), May +6.9% (up 93% of 14 years), June +4.8% (up 64% of 14 years), July +2.2% (up 57% of 14 years), August -1.2% (up 38% of 13 years), September -1.0% (up 38% of 13 years), October +5.4% (up 69% of 13 years), November +6.3% (up 85% of 13 years), December +4.2% (up 69% of 13 years). In other words, TER historically rose in January, February, May, June, July, October, November, December, and fell in March, April, August, September.
Does Teradyne really go up in May?
Over 2013-2026, May is Teradyne's strongest month: +6.9% on average, positive in 13 of 14 years. At the other end, August shows -1.2%. But a monthly gap is often built on one or two extreme years — the table above shows it: look at the spread, not just the average. Seasonality only means something when it has a cause (selling season, earnings calendar, year-end tax effects); with no identified cause, it's probably noise.
Frequently asked questions
Does Teradyne stock go up or down in November?
Over 13 years, TER rose +6.3% on average in November, finishing the month up 11 times out of 13 (85%). Median: +4.7%. It's one of its most consistent months. ⚠️ 13 years of data is not a prediction.
Does Teradyne stock go up or down in October?
Over 13 years, TER rose +5.4% on average in October, finishing the month up 9 times out of 13 (69%). Median: +7.9%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Teradyne stock go up or down in June?
Over 14 years, TER rose +4.8% on average in June, finishing the month up 9 times out of 14 (64%). Median: +3.2%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does Teradyne stock go up or down in February?
Over 14 years, TER rose +4.7% on average in February, finishing the month up 9 times out of 14 (64%). Median: +2.1%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does Teradyne stock go up or down in December?
Over 13 years, TER rose +4.2% on average in December, finishing the month up 9 times out of 13 (69%). Median: +4.2%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Teradyne stock go up or down in July?
Over 14 years, TER rose +2.2% on average in July, finishing the month up 8 times out of 14 (57%). Median: +0.9%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
What is the best month to buy Teradyne stock?
Historically, May: over the last 14 years, TER gained +6.9% on average that month and finished up 93% of the time (14 years observed). August is the weakest month (-1.2%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Why does Teradyne stock often rise in May?
May has averaged as its best month over 14 years (+6.9%, up 93% of years). No clearly established recurring seasonal driver explains this month — it's a statistical tendency over 14 years of history, not a prediction.
Is there a best month to invest in the stock market in general?
There's no universal rule: every stock has its own seasonality. For TER it's May (+6.9% on average over 14 years) — another stock will look completely different. The calendar effects people cite ("sell in May", the year-end rally) are market-wide averages, not laws: on TER, May is the most consistent month (93% positive years). We also rank all 12 months for the whole market.
Does stock seasonality actually work?
Careful. A month that rose 14 times out of 14 can simply be chance: with 12 months and a dozen years, patterns appear naturally even in random data. Seasonality describes what happened; it doesn't explain why and predicts nothing. Treat it as context, never as a standalone buy signal.
What data is this table based on?
On TER's real monthly closing prices from 2013 to 2026 (14 years), source Yahoo Finance. Each cell = the price change over that month. Price performance, excluding dividends. Incomplete months and quote gaps are excluded.