The takeaway
ICF International Inc shows a pronounced seasonal pattern over 10 years of data — strongest in August (+6.7%) and softest in February (−3.6%).
Right now
In July, the stock has risen 60% of years, averaging +1.6%, roughly 0.5 pts behind the S&P 500.
The full picture
ICF International Inc's most dependable month has been August, higher in 10 of 10 years; February has been its least reliable, up just 40% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in August (+6.4 pts); it has trailed the market most in February (−3.3 pts).
“vs S&P” is ICF International Inc’s average for a month minus the S&P 500’s average for that same month — isolating ICF International Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, August has closed higher 100% of the time versus 100% across the last 10 years — the pattern is strengthening.
Figures are the typical (median) August return and how often it rose — the last 5 years versus the last 10(the heatmap’s default window). This verdict stays anchored to that 10-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
Strip the year back and a single month does the heavy lifting: August, up in all 10 Augusts while the other eleven tend to blur together.
Its average (+6.7%) and median (+6.4%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. Crucially, the gain is the stock's own rather than a rising tide's: August has cleared the S&P 500 by +6.4 points above the index. That consistency sets it apart from the field, where the average stock manages August only about 52% of the time.
A few other months pull their weight: April, July, and October have also closed higher more often than not. At the other end of the calendar, February has been the soft spot — the weakest of 5 months that average a loss (−3.6%), and the edge isn't year-round — the stock has trailed the S&P 500 in February, December, and September. Its roughest month on record was a −32.7% February in 2025 — a reminder of how hard even a seasonal name can fall.
August has now closed higher 10 years running. If anything it has sharpened recently — the last five Augusts run ahead of the earlier years.
The takeaway is less about when to buy than what to expect: August aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (August), its worst (February), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (August, +6.7%) has run well ahead of its worst (February, −3.6%) — the heatmap above shows how steady that gap has been year to year.
August has been the strongest, averaging +6.7% and closing higher in all 10 years on record since 2016.
It's the weakest, averaging −3.6% — historically a soft spot, though it still varies from year to year.
Explore
These names have the strongest July track records on record — a starting point for comparison.
Before you trade