Does TransDigm Group (TDG) stock go up or down depending on the month?
TransDigm Group month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +7.3% | -8.7% | -11.0% | +0.1% | +8.5% | +5.9% | -5.8% | |||||
| 2025 | +6.8% | +1.0% | +1.2% | +2.2% | +3.9% | +3.6% | +5.8% | -13.0% | -5.8% | -0.7% | +3.9% | -2.2% |
| 2024 | +8.0% | +7.8% | +4.6% | +1.3% | +7.6% | -4.9% | +1.3% | +6.1% | +3.9% | -8.7% | -3.8% | +1.1% |
| 2023 | +14.0% | +3.6% | -0.9% | +3.8% | +1.1% | +15.6% | +0.6% | +0.5% | -6.7% | -1.8% | +16.3% | +5.1% |
| 2022 | -3.2% | +8.2% | -2.3% | -8.7% | +1.8% | -11.3% | +16.0% | -3.5% | -12.6% | +9.7% | +9.2% | +0.2% |
| 2021 | -10.6% | +4.2% | +2.0% | +4.4% | +5.7% | -0.2% | -1.0% | -5.2% | +2.8% | -0.1% | -7.3% | +10.1% |
| 2020 | +14.9% | -13.3% | -42.6% | +13.4% | +17.0% | +4.1% | -2.4% | +15.8% | -4.9% | +0.5% | +21.3% | +6.8% |
| 2019 | +15.0% | +11.0% | +4.6% | +6.3% | -8.6% | +9.7% | +0.3% | +10.9% | -3.3% | +1.1% | +7.8% | -1.3% |
| 2018 | +15.4% | -9.0% | +6.5% | +4.4% | +4.2% | +3.3% | +8.8% | -6.8% | +6.4% | -11.3% | +9.5% | -6.0% |
| 2017 | -13.1% | +17.5% | -13.4% | +12.1% | +8.7% | +0.3% | +4.9% | -7.6% | -1.9% | +8.5% | +2.3% | -3.2% |
| 2016 | -1.6% | -5.0% | +3.2% | +3.4% | +15.7% | +0.1% | +6.0% | +2.0% | +1.4% | -5.8% | -7.7% | -1.0% |
| 2015 | +4.7% | +5.5% | +0.9% | -3.0% | +6.6% | -0.6% | +0.7% | +1.6% | -7.6% | +3.5% | +6.7% | -2.6% |
| 2014 | +3.7% | +6.7% | +4.0% | -4.0% | +6.1% | -11.4% | +0.4% | +12.0% | -1.9% | +1.5% | +5.8% | -0.7% |
| 2013 | +5.1% | +7.4% | -4.0% | -0.5% | +7.3% | -7.8% | -5.2% | +1.2% | +4.8% | +7.6% | +2.9% | |
| Average | +4.7% | +2.5% | -2.6% | +2.3% | +5.6% | +1.5% | +2.0% | +0.6% | -2.2% | +0.1% | +5.5% | +0.7% |
| % of years up | 69% | 71% | 64% | 71% | 86% | 64% | 71% | 54% | 38% | 54% | 77% | 46% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
TransDigm Group month by month: the summary
Over 2013-2026, here's what TransDigm Group (TDG) stock did each month, on average: January +4.7% (up 69% of 13 years), February +2.5% (up 71% of 14 years), March -2.6% (up 64% of 14 years), April +2.3% (up 71% of 14 years), May +5.6% (up 86% of 14 years), June +1.5% (up 64% of 14 years), July +2.0% (up 71% of 14 years), August +0.6% (up 54% of 13 years), September -2.2% (up 38% of 13 years), October +0.1% (up 54% of 13 years), November +5.5% (up 77% of 13 years), December +0.7% (up 46% of 13 years). In other words, TDG historically rose in January, February, April, May, June, July, August, October, November, December, and fell in March, September.
Does TransDigm Group really go up in May?
Over 2013-2026, May is TransDigm Group's strongest month: +5.6% on average, positive in 12 of 14 years. At the other end, March shows -2.6%. 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 TransDigm Group stock go up or down in August?
Over 13 years, TDG rose +0.6% on average in August, finishing the month up 7 times out of 13 (54%). Median: +0.5%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does TransDigm Group stock go up or down in November?
Over 13 years, TDG rose +5.5% on average in November, finishing the month up 10 times out of 13 (77%). Median: +6.7%. It's one of its most consistent months. ⚠️ 13 years of data is not a prediction.
Does TransDigm Group stock go up or down in January?
Over 13 years, TDG rose +4.7% on average in January, finishing the month up 9 times out of 13 (69%). Median: +6.8%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does TransDigm Group stock go up or down in February?
Over 14 years, TDG rose +2.5% on average in February, finishing the month up 10 times out of 14 (71%). Median: +4.7%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does TransDigm Group stock go up or down in April?
Over 14 years, TDG rose +2.3% on average in April, finishing the month up 10 times out of 14 (71%). Median: +2.8%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does TransDigm Group stock go up or down in September?
Over 13 years, TDG fell -2.2% on average in September, finishing the month up 5 times out of 13 (38%). Median: -1.9%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
What is the best month to buy TransDigm Group stock?
Historically, May: over the last 14 years, TDG gained +5.6% on average that month and finished up 86% of the time (14 years observed). March is the weakest month (-2.6%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Do TransDigm's quarterly earnings move the stock?
May — when TransDigm reports quarterly earnings — has been its best month over 14 years (+5.6% on average, up 86% of years). Earnings are a known driver of moves. ⚠️ This is a past tendency over a short history, not a rule. Use it as context, never as a buy plan.
Why does TransDigm Group stock often rise in May?
May has averaged as its best month over 14 years (+5.6%, up 86% of years). This month covers TransDigm's quarterly earnings release — a known driver of moves, and over this history it has tended to push the stock higher.
Why is TransDigm Group stock weaker in March?
March has averaged as its weakest month over 14 years (-2.6%, up only 64% 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 TDG it's May (+5.6% 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 TDG, May is the most consistent month (86% 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 TDG'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.