AECOM (ACM) Seasonality
Recurring seasonal patterns for ACM — the calendar windows where AECOM has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
ACM seasonality at a glance
Over the last 10 years, ACM's strongest seasonal window has been Oct 24 – Nov 13: it ended higher in 10 of 10 years (100% win rate) with an average return of +6.20% across a 20-day hold. On the weak side, ACM has historically declined between May 4 – May 14, falling in 9 of 10 years (average -3.11%).
In total, our analysis finds 735 recurring seasonal windows for AECOM — 529 bullish and 206 bearish. The next high-win-rate window, Oct 10 – Nov 9, opens in 29 days. These figures describe historical behaviour only — not a forecast.
ACM's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 9d ago | Aug 23 – Sep 2 | 10d | +1.65% | 80% | +2.58% |
| Completedended 10d ago | Aug 22 – Sep 1 | 10d | +1.79% | 80% | +2.22% |
| Upcomingin 29d | Oct 10 – Nov 9 | 30d | +4.53% | 80% | — |
| Upcomingin 30d | Oct 11 – Nov 10 | 30d | +6.32% | 80% | — |
| Upcomingin 31d | Oct 12 – Nov 11 | 30d | +6.68% | 80% | — |
| Upcomingin 32d | Oct 13 – Nov 12 | 30d | +6.54% | 80% | — |
| Upcomingin 33d | Oct 14 – Nov 13 | 30d | +6.58% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore ACM seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
ACM seasonality FAQ
What has historically been the best month to buy ACM stock?
Based on the last 10 years of price data, ACM's strongest seasonal window starts in October: Oct 24 to Nov 13, which ended higher in 10 of 10 years (100% win rate) with an average return of +6.20%. Past seasonal patterns do not guarantee future performance.
What is ACM's strongest seasonal pattern?
ACM's highest-win-rate pattern in our data is the Oct 24 – Nov 13 window (20-day hold): up in 10 of the last 10 years with an average move of +6.20%.
When has ACM historically performed worst?
ACM's weakest recurring window has been May 4 to May 14, declining in 9 of 10 years with an average return of -3.11%.
How reliable are ACM's seasonal patterns?
Each ACM pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. ACM currently shows 735 recurring windows (529 bullish, 206 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is ACM stock seasonality?
Seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing AECOM's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where ACM has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.