The takeaway
Amkor Technology Inc shows a pronounced seasonal pattern over 10 years of data — strongest in July (+7.3%) and softest in March (−2.0%).
Right now
In July, the stock has risen 80% of years, averaging +7.3%, about +5.1 pts better than the S&P 500.
The full picture
Amkor Technology Inc's most dependable month has been July, higher in 8 of 10 years; March has been its least reliable, up just 30% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in November (+5.9 pts); it has trailed the market most in April (−3.6 pts).
“vs S&P” is Amkor Technology Inc’s average for a month minus the S&P 500’s average for that same month — isolating Amkor Technology Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, July has closed higher 60% of the time versus 80% across the last 10 years — the pattern is weakening.
Figures are the typical (median) July 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: July, up in 8 of 10 Julys while the other eleven tend to blur together.
Its average (+7.3%) and median (+6.7%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. That reliability comes with real swings, mind — even July ranges by 12.5% 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: July has cleared the S&P 500 by +5.1 points above the index. That consistency sets it apart from the field, where the average stock manages July only about 61% of the time.
The strength clusters rather than stands alone — May–July forms a firm stretch that carries much of the year. The weaker half of the year is plainer: March has been the soft spot — the weakest of 4 months that average a loss (−2.0%), and the edge isn't year-round — the stock has trailed the S&P 500 in April, March, and September. Its roughest month on record was a −27.8% May in 2019 — a reminder of how hard even a seasonal name can fall.
At its steadiest, July strung together 7 straight positive years. The pattern has softened of late, July's last five years slipping below its longer-run record.
The takeaway is less about when to buy than what to expect: July aside, the stock's months offer little reliable tilt. With returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (July), its worst (March), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (July, +7.3%) has run well ahead of its worst (March, −2.0%) — the heatmap above shows how steady that gap has been year to year.
July has been the strongest, averaging +7.3% and closing higher in 8 of 10 years since 2016.
It's the weakest, averaging −2.0% — 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