The takeaway
Viant Technology Inc shows a pronounced seasonal pattern over 5 years of data — strongest in December (+4.5%) and softest in September (−10.0%).
Right now
In July, the stock has fallen 60% of years, averaging −2.8%, roughly 4.9 pts behind the S&P 500.
The full picture
Viant Technology Inc's most dependable month has been December, higher in 4 of 5 years; September has been its least reliable, up just 20% of the time.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Win rate % | ||||||||||||
| Median return % | ||||||||||||
| 2025 | ||||||||||||
| 2024 | ||||||||||||
| 2023 | ||||||||||||
| 2022 | ||||||||||||
| 2021 | — |
Month by month
The stock's clearest edge over the S&P 500 lands in January (+12.0 pts); it has trailed the market most in April (−12.3 pts).
“vs S&P” is Viant Technology Inc’s average for a month minus the S&P 500’s average for that same month — isolating Viant Technology Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, December has closed higher 80% of the time versus 80% across the last 5 years — the pattern is holding.
Figures are the typical (median) December return and how often it rose — the last 5 years versus the last 5(the heatmap’s default window). This verdict stays anchored to that 5-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: December, up in 4 of 5 Decembers while the other eleven tend to blur together.
Its average (+4.5%) and median (+4.7%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. It is also the calendar's calmest month, its returns swinging least from year to year (a 3.6% spread), and even its worst December in 5 years lost only 1.6% — the gentlest downside anywhere on its calendar. Crucially, the gain is the stock's own rather than a rising tide's: December has cleared the S&P 500 by +3.5 points above the index. That consistency sets it apart from the field, where the average stock manages December only about 58% of the time.
The strength clusters rather than stands alone — October–March forms a firm stretch that carries much of the year. The weaker half of the year is plainer: September has been the soft spot — the weakest of 7 months that average a loss (−10.0%), and the edge isn't year-round — the stock has trailed the S&P 500 in April, September, and March. Its roughest month on record was a −38.7% July in 2021 — a reminder of how hard even a seasonal name can fall.
The takeaway is less about when to buy than what to expect: December aside, the stock's months offer little reliable tilt. With a short 5-year record and returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (December), its worst (September), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2021 its best month (December, +4.5%) has run well ahead of its worst (September, −10.0%) — the heatmap above shows how steady that gap has been year to year.
December has been the strongest, averaging +4.5% and closing higher in 4 of 5 years since 2021.
It's the weakest, averaging −10.0% — 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