CGI (GIB-A.TO) Seasonality
Recurring seasonal patterns for GIB-A.TO — the calendar windows where CGI 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.
GIB-A.TO seasonality at a glance
Over the last 10 years, GIB-A.TO's strongest seasonal window has been Nov 19 – Dec 19: it ended higher in 10 of 10 years (100% win rate) with an average return of +2.88% across a 30-day hold. On the weak side, GIB-A.TO has historically declined between Sep 2 – Sep 22, falling in 9 of 10 years (average -1.88%).
In total, our analysis finds 576 recurring seasonal windows for CGI — 413 bullish and 163 bearish. The next high-win-rate window, Oct 27 – Nov 26, opens tomorrow. These figures describe historical behaviour only — not a forecast.
GIB-A.TO'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 27d ago | Aug 30 – Sep 29 | 30d | -1.82% | 80% | -7.72% |
| Completedended 29d ago | Sep 7 – Sep 27 | 20d | -1.72% | 80% | -6.06% |
| Active30d left | Oct 26 – Nov 25 | 30d | +4.04% | 90% | — |
| Upcomingtomorrow | Oct 27 – Nov 26 | 30d | +4.58% | 90% | — |
| Upcomingin 2d | Oct 28 – Nov 27 | 30d | +4.63% | 80% | — |
| Upcomingin 4d | Oct 30 – Nov 29 | 30d | +4.26% | 80% | — |
| Upcomingin 6d | Nov 1 – Nov 21 | 20d | +2.98% | 90% | — |
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 GIB-A.TO seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
GIB-A.TO seasonality FAQ
What has historically been the best month to buy GIB-A.TO stock?
Based on the last 10 years of price data, GIB-A.TO's strongest seasonal window starts in November: Nov 19 to Dec 19, which ended higher in 10 of 10 years (100% win rate) with an average return of +2.88%. Past seasonal patterns do not guarantee future performance.
What is GIB-A.TO's strongest seasonal pattern?
GIB-A.TO's highest-win-rate pattern in our data is the Nov 19 – Dec 19 window (30-day hold): up in 10 of the last 10 years with an average move of +2.88%.
When has GIB-A.TO historically performed worst?
GIB-A.TO's weakest recurring window has been Sep 2 to Sep 22, declining in 9 of 10 years with an average return of -1.88%.
How reliable are GIB-A.TO's seasonal patterns?
Each GIB-A.TO pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. GIB-A.TO currently shows 576 recurring windows (413 bullish, 163 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is GIB-A.TO stock seasonality?
Seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing CGI's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where GIB-A.TO 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.