The takeaway
Acm Research Inc shows a pronounced seasonal pattern over 9 years of data — strongest in February (+16.4%) and softest in October (−14.4%).
Right now
In July, the stock has risen 50% of years, averaging +8.2%, about +6.0 pts better than the S&P 500.
The full picture
Acm Research Inc's most dependable month has been February, higher in 6 of 8 years; October has been its least reliable, up just 0% of the time.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| 2017 | — | — | — | — | — | — | — | — | — | — |
Month by month
The stock's clearest edge over the S&P 500 lands in February (+16.7 pts); it has trailed the market most in October (−15.4 pts).
“vs S&P” is Acm Research Inc’s average for a month minus the S&P 500’s average for that same month — isolating Acm Research Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, February has closed higher 80% of the time versus 75% across the last 9 years — the pattern is weakening.
Figures are the typical (median) February return and how often it rose — the last 5 years versus the last 9(the heatmap’s default window). This verdict stays anchored to that 9-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
Dependability is the through-line here. February stands out, higher in 6 of 8 Februaries, but it heads a clutch of months that pull the year reliably upward.
The headline flatters a touch — its +16.4% average sits well above the +7.4% a typical year delivers, the work of a few big Februaries. That reliability comes with real swings, mind — even February ranges by 28.4% from year to year, so any single year can land far from the average. Crucially, the gain is the stock's own rather than a rising tide's: February has cleared the S&P 500 by +16.7 points above the index. It bucks the broad tape, besides: February lifts just 49% of stocks across the market.
A few other months pull their weight: May, June, and November have also closed higher more often than not. At the other end of the calendar, October has been the soft spot — the weakest of 2 months that average a loss (−14.4%), and the edge isn't year-round — the stock has trailed the S&P 500 in October and April. Its roughest month on record was a −51.0% October in 2022 — a reminder of how hard even a seasonal name can fall.
The pattern has softened of late, February's last five years slipping below its longer-run record.
The takeaway is less about when to buy than what to expect: February aside, the stock's months offer little reliable tilt. With a short 9-year record and returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (February), its worst (October), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2017 its best month (February, +16.4%) has run well ahead of its worst (October, −14.4%) — the heatmap above shows how steady that gap has been year to year.
February has been the strongest, averaging +16.4% and closing higher in 6 of 8 years since 2017.
It's the weakest, averaging −14.4% — 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