Fastly (FSLY) — Daily Price Character
Historical session stats from dividend-adjusted prices: win rate, streaks, record days, weekday patterns, and (when available) how often the stock was green on S&P 500 green days.
FSLY
Archetype
Explosive
High daily volatility — frequent large price swings.
Win rate
49.5%
860 green · 866 red · 13 flat · 1739 sessions
Current streak
1 green
As of Apr 20, 2026
Max win / lose streak
11 / 9 days
Win streak return: +88.80% · Lose: 41.11%
Median / σ daily
+0.000% · 5.546%
Avg green +3.87% · avg red 3.54%
Extreme days (>3%)
46.0%
405 up · 395 down
History from May 20, 2019 through Apr 20, 2026 · 1739 trading days with returns.
Trailing year — daily returns (calendar)
Apr 21, 2025 – Apr 20, 2026 · Mon–Fri sessions only
Monday–Friday — average return
Average dividend-adjusted return on that weekday (green / red by sign). Green/red day rule: ±0.01% vs prior close.
Monday–Friday — win rate
Share of sessions that closed green on that weekday. Bars are green at or above 50%, red below 50%.
Top green days
Largest single-session gains (dividend-adjusted), by historical return.
| Date | Return |
|---|---|
| Feb 12, 2026 | +72.29% |
| May 7, 2020 | +45.68% |
| Nov 6, 2025 | +35.94% |
| Feb 13, 2023 | +27.66% |
| May 8, 2025 | +26.37% |
| Aug 3, 2023 | +23.04% |
| Mar 17, 2020 | +22.55% |
| Oct 7, 2020 | +19.84% |
| Nov 10, 2022 | +19.30% |
| Mar 19, 2020 | +18.22% |
| Nov 21, 2024 | +17.44% |
| Aug 22, 2019 | +16.81% |
| Dec 2, 2024 | +16.39% |
| Apr 9, 2025 | +16.00% |
| Feb 16, 2023 | +15.79% |
| Aug 3, 2020 | +15.72% |
| Nov 2, 2023 | +15.58% |
| Jun 22, 2020 | +15.04% |
| Dec 8, 2020 | +14.69% |
| Aug 7, 2025 | +14.42% |
Worst red days
Largest single-session losses; "Days to recovery" counts trading sessions until close recovered the prior peak (dividend-adjusted).
| Date | Return | Days to recovery |
|---|---|---|
| Feb 17, 2022 | 33.63% | 1027 |
| May 2, 2024 | 32.02% | 446 |
| Feb 15, 2024 | 30.59% | 517 |
| Oct 15, 2020 | 27.18% | — |
| May 6, 2021 | 27.13% | 34 |
| Apr 10, 2026 | 21.69% | — |
| Feb 13, 2025 | 20.85% | 184 |
| Mar 16, 2020 | 20.50% | 2 |
| May 5, 2022 | 18.09% | 226 |
| Aug 9, 2019 | 18.06% | 9 |
| Aug 6, 2020 | 17.70% | 43 |
| Feb 18, 2021 | 15.45% | — |
| Aug 8, 2024 | 14.33% | 26 |
| Apr 14, 2026 | 14.03% | 2 |
| Mar 6, 2020 | 14.03% | 25 |
| Jul 11, 2022 | 14.00% | 152 |
| Mar 12, 2020 | 13.95% | 5 |
| Oct 5, 2023 | 13.64% | 32 |
| Sep 9, 2019 | 13.47% | 2 |
| Apr 4, 2025 | 13.13% | 22 |
Frequently asked questions
What is the daily win rate for Fastly (FSLY)?
- Historically, Fastly (FSLY) closed green on 49.5% of trading days (860 green, 866 red, 13 flat), using dividend-adjusted closes and a ±0.01% threshold for green vs red.
What is the current winning or losing streak for Fastly (FSLY)?
- As of 2026-04-20, Fastly (FSLY) is on a 1-day winning streak (consecutive green or red days by the same rules, ignoring trailing flat days).
What does Steady, Balanced, or Explosive mean for Fastly (FSLY)?
- We label Fastly (FSLY) as "explosive" based on the sample standard deviation of daily returns: High daily volatility — frequent large price swings.
What were the best and worst single trading days for Fastly (FSLY)?
- Largest single-day gain: +72.29%. Largest single-day loss: 33.63%. Tables on this page list the top record green and red days.
What counts as an "extreme" daily move for Fastly (FSLY)?
- We treat a day as extreme if the absolute dividend-adjusted daily return exceeds 3%. About 46.0% of trading days for Fastly (FSLY) were extreme (405 up, 395 down).
Data & methodology
How are green, red, and flat days defined?
- We use dividend-adjusted (or close-to-close for non-equity) daily returns. Green: return ≥ +0.01%. Red: return ≤ −0.01%. Flat: between those bounds.
How is the current streak calculated?
- We count consecutive green or consecutive red days using the same thresholds. If the most recent session is flat, we skip trailing flat days and measure from the last non-flat close.
What does “vs S&P 500” mean?
- On sessions where the S&P 500 (^GSPC) was green, we report how often this stock was also green. Shown only for USD equities when benchmark data exists and the symbol is not the index itself.
Where does the archetype come from?
- Sample standard deviation of daily returns: low → Steady, high → Explosive, otherwise Balanced. Labels describe typical daily volatility, not quality of the investment.