Fastly (FSLY) seasonality heatmap
Returns across monthly, quarterly, and yearly periods. Cell color encodes signed magnitude; the scale auto-fits each table.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -9.1% | +106.7% | +52.0% | -13.1% | -29.7% | +3.3% | +12.9% | — | — | — | — | — |
| 2025 | +10.9% | -35.0% | -7.0% | -9.2% | +26.6% | -3.0% | -3.8% | +12.1% | +12.4% | -3.0% | +40.7% | -12.7% |
| 2024 | +13.0% | -29.3% | -8.8% | -2.5% | -38.0% | -6.0% | +9.9% | -25.7% | +25.7% | -4.5% | +17.3% | +11.3% |
| 2023 | +26.4% | +34.2% | +27.9% | -16.8% | +10.1% | -3.1% | +16.5% | +29.5% | -19.4% | -23.5% | +13.2% | +7.2% |
| 2022 | -19.2% | -35.1% | -6.6% | -8.5% | -17.9% | -11.0% | -2.1% | -17.8% | -2.0% | -7.3% | +13.8% | -15.2% |
| 2021 | +25.2% | -32.7% | -8.6% | -5.1% | -26.1% | +26.3% | -19.3% | -9.3% | -7.2% | +25.1% | -19.5% | -13.0% |
| 2020 | +12.2% | -12.0% | -4.1% | +14.1% | +99.3% | +97.3% | +13.3% | -3.8% | +0.9% | -32.2% | +33.5% | +3.1% |
| 2019 | — | — | — | — | — | -2.5% | +7.0% | +45.6% | -24.1% | -16.6% | +1.9% | -1.7% |
| Avg | +8.5% | -0.5% | +6.4% | -5.9% | +3.5% | +12.7% | +3.1% | +4.4% | -2.0% | -8.9% | +14.4% | -3.0% |
| Median | +12.2% | -29.3% | -6.6% | -8.5% | -17.9% | -2.8% | +7.0% | -3.8% | -2.0% | -7.3% | +13.8% | -1.7% |
| Last 5Y Avg | +4.4% | +8.3% | +11.5% | -10.0% | -9.8% | -4.0% | +0.2% | -2.2% | +1.9% | -2.6% | +13.1% | -4.5% |
| Std Dev (σ) | 16.9% | 53.4% | 24.0% | 10.0% | 48.1% | 36.0% | 12.4% | 25.9% | 17.3% | 18.4% | 19.9% | 10.7% |
| Consistency (μ/σ) | 0.50 | -0.01 | 0.27 | -0.59 | 0.07 | 0.35 | 0.25 | 0.17 | -0.11 | -0.48 | 0.73 | -0.28 |
| Win Rate (%) | 71% | 29% | 29% | 14% | 43% | 38% | 57% | 43% | 43% | 14% | 86% | 43% |
| Winning / Losing Months | ▲5▼2 | ▲2▼5 | ▲2▼5 | ▲1▼6 | ▲3▼4 | ▲3▼5 | ▲4▼3 | ▲3▼4 | ▲3▼4 | ▲1▼6 | ▲6▼1 | ▲3▼4 |
| Longest Win / Loss Streak | ▲3▼1 | ▲1▼3 | ▲1▼3 | ▲1▼6 | ▲1▼2 | ▲2▼4 | ▲2▼2 | ▲1▼3 | ▲2▼3 | ▲1▼4 | ▲4▼1 | ▲2▼2 |
| Best | +26.4%in January 2023 | +106.7%in February 2026 | +52.0%in March 2026 | +14.1%in April 2020 | +99.3%in May 2020 | +97.3%in June 2020 | +16.5%in July 2023 | +45.6%in August 2019 | +25.7%in September 2024 | +25.1%in October 2021 | +40.7%in November 2025 | +11.3%in December 2024 |
| Worst | -19.2%in January 2022 | -35.1%in February 2022 | -8.8%in March 2024 | -16.8%in April 2023 | -38.0%in May 2024 | -11.0%in June 2022 | -19.3%in July 2021 | -25.7%in August 2024 | -24.1%in September 2019 | -32.2%in October 2020 | -19.5%in November 2021 | -15.2%in December 2022 |
-38.0%+106.7%
2026
Jan-9.1%
Feb+106.7%
Mar+52.0%
Apr-13.1%
May-29.7%
Jun+3.3%
Jul+12.9%
Aug—
Sep—
Oct—
Nov—
Dec—
2025
Jan+10.9%
Feb-35.0%
Mar-7.0%
Apr-9.2%
May+26.6%
Jun-3.0%
Jul-3.8%
Aug+12.1%
Sep+12.4%
Oct-3.0%
Nov+40.7%
Dec-12.7%
2024
Jan+13.0%
Feb-29.3%
Mar-8.8%
Apr-2.5%
May-38.0%
Jun-6.0%
Jul+9.9%
Aug-25.7%
Sep+25.7%
Oct-4.5%
Nov+17.3%
Dec+11.3%
2023
Jan+26.4%
Feb+34.2%
Mar+27.9%
Apr-16.8%
May+10.1%
Jun-3.1%
Jul+16.5%
Aug+29.5%
Sep-19.4%
Oct-23.5%
Nov+13.2%
Dec+7.2%
2022
Jan-19.2%
Feb-35.1%
Mar-6.6%
Apr-8.5%
May-17.9%
Jun-11.0%
Jul-2.1%
Aug-17.8%
Sep-2.0%
Oct-7.3%
Nov+13.8%
Dec-15.2%
2021
Jan+25.2%
Feb-32.7%
Mar-8.6%
Apr-5.1%
May-26.1%
Jun+26.3%
Jul-19.3%
Aug-9.3%
Sep-7.2%
Oct+25.1%
Nov-19.5%
Dec-13.0%
2020
Jan+12.2%
Feb-12.0%
Mar-4.1%
Apr+14.1%
May+99.3%
Jun+97.3%
Jul+13.3%
Aug-3.8%
Sep+0.9%
Oct-32.2%
Nov+33.5%
Dec+3.1%
2019
Jan—
Feb—
Mar—
Apr—
May—
Jun-2.5%
Jul+7.0%
Aug+45.6%
Sep-24.1%
Oct-16.6%
Nov+1.9%
Dec-1.7%
Avg
Jan+8.5%
Feb-0.5%
Mar+6.4%
Apr-5.9%
May+3.5%
Jun+12.7%
Jul+3.1%
Aug+4.4%
Sep-2.0%
Oct-8.9%
Nov+14.4%
Dec-3.0%
Median
Jan+12.2%
Feb-29.3%
Mar-6.6%
Apr-8.5%
May-17.9%
Jun-2.8%
Jul+7.0%
Aug-3.8%
Sep-2.0%
Oct-7.3%
Nov+13.8%
Dec-1.7%
Last 5Y Avg
Jan+4.4%
Feb+8.3%
Mar+11.5%
Apr-10.0%
May-9.8%
Jun-4.0%
Jul+0.2%
Aug-2.2%
Sep+1.9%
Oct-2.6%
Nov+13.1%
Dec-4.5%
Std Dev (σ)
Jan16.9%
Feb53.4%
Mar24.0%
Apr10.0%
May48.1%
Jun36.0%
Jul12.4%
Aug25.9%
Sep17.3%
Oct18.4%
Nov19.9%
Dec10.7%
Consistency (μ/σ)
Jan0.50
Feb-0.01
Mar0.27
Apr-0.59
May0.07
Jun0.35
Jul0.25
Aug0.17
Sep-0.11
Oct-0.48
Nov0.73
Dec-0.28
Win Rate (%)
Jan71%
Feb29%
Mar29%
Apr14%
May43%
Jun38%
Jul57%
Aug43%
Sep43%
Oct14%
Nov86%
Dec43%
Winning / Losing Months
Jan▲5▼2
Feb▲2▼5
Mar▲2▼5
Apr▲1▼6
May▲3▼4
Jun▲3▼5
Jul▲4▼3
Aug▲3▼4
Sep▲3▼4
Oct▲1▼6
Nov▲6▼1
Dec▲3▼4
Longest Win / Loss Streak
Jan▲3▼1
Feb▲1▼3
Mar▲1▼3
Apr▲1▼6
May▲1▼2
Jun▲2▼4
Jul▲2▼2
Aug▲1▼3
Sep▲2▼3
Oct▲1▼4
Nov▲4▼1
Dec▲2▼2
Best
Jan+26.4%2023
Feb+106.7%2026
Mar+52.0%2026
Apr+14.1%2020
May+99.3%2020
Jun+97.3%2020
Jul+16.5%2023
Aug+45.6%2019
Sep+25.7%2024
Oct+25.1%2021
Nov+40.7%2025
Dec+11.3%2024
Worst
Jan-19.2%2022
Feb-35.1%2022
Mar-8.8%2024
Apr-16.8%2023
May-38.0%2024
Jun-11.0%2022
Jul-19.3%2021
Aug-25.7%2024
Sep-24.1%2019
Oct-32.2%2020
Nov-19.5%2021
Dec-15.2%2022
-38.0%+106.7%
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