The takeaway
Spok Holdings Inc shows a pronounced seasonal pattern over 10 years of data — strongest in August (+5.0%) and softest in April (−4.2%).
Right now
In July, the stock has fallen 50% of years, averaging −0.8%, roughly 3.0 pts behind the S&P 500.
The full picture
Spok Holdings Inc's most dependable month has been August, higher in 7 of 10 years; April has been its least reliable, up just 20% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in August (+4.7 pts); it has trailed the market most in April (−5.8 pts).
“vs S&P” is Spok Holdings Inc’s average for a month minus the S&P 500’s average for that same month — isolating Spok Holdings Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, August has closed higher 80% of the time versus 70% 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 7 of 10 Augusts while the other eleven tend to blur together.
The headline flatters a touch — its +5.0% average sits well above the +2.8% a typical year delivers, the work of a few big Augusts. That reliability comes with real swings, mind — even August ranges by 8.9% 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: August has cleared the S&P 500 by +4.7 points above the index. That consistency sets it apart from the field, where the average stock manages August only about 52% of the time.
The strength clusters rather than stands alone — August–November forms a firm stretch that carries much of the year. On the other side of the ledger, April has been the soft spot — the weakest of 4 months that average a loss (−4.2%), and the edge isn't year-round — the stock has trailed the S&P 500 in April, July, and March. Its roughest month on record was a −17.9% June in 2021 — a reminder of how hard even a seasonal name can fall.
A long streak recently broke — August had risen 5 years straight before a −0.2% reading in 2025. 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 (April), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (August, +5.0%) has run well ahead of its worst (April, −4.2%) — the heatmap above shows how steady that gap has been year to year.
August has been the strongest, averaging +5.0% and closing higher in 7 of 10 years since 2016.
It's the weakest, averaging −4.2% — 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