CSTL
$33.15+3.06%
Castle Biosciences Inc.Stock · HealthcareRussell 2000 · 0.02% of IWMUS Stock Market · 0.0009% of VTIRussell 3000 · 0.0007% of IWV
Castle Biosciences Inc. monthly returns
Castle Biosciences Inc. has averaged 1.62% per month, positive in 49% of months. Month-by-month returns for Castle Biosciences Inc. (CSTL) below, through October 20, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.
Average month
+1.6%
82 months
Best month
+58.5%
Aug 2025
Worst month
-50.2%
Apr 2022
Positive months
49%
of all months
Castle Biosciences Inc. monthly returns#
| Month | Path | Total return |
|---|---|---|
| Oct 2026 | -6.7% | |
| Sep 2026 | +7.6% | |
| Aug 2026 | +18.0% | |
| Jul 2026 | +17.4% | |
| Jun 2026 | +13.1% | |
| May 2026 | -13.9% | |
| Apr 2026 | -0.2% | |
| Mar 2026 | -17.0% | |
| Feb 2026 | -24.9% | |
| Jan 2026 | +1.3% | |
| Dec 2025 | -2.6% | |
| Nov 2025 | +56.7% | |
| Oct 2025 | +12.0% | |
| Sep 2025 | -5.2% | |
| Aug 2025 | +58.5% | |
| Jul 2025 | -25.8% | |
| Jun 2025 | +27.9% | |
| May 2025 | -20.3% | |
| Apr 2025 | +0.1% | |
| Mar 2025 | -7.7% | |
| Feb 2025 | -23.3% | |
| Jan 2025 | +6.1% | |
| Dec 2024 | -12.0% | |
| Nov 2024 | -12.7% | |
| Oct 2024 | +21.6% | |
| Sep 2024 | -3.9% | |
| Aug 2024 | +23.0% | |
| Jul 2024 | +10.8% | |
| Jun 2024 | -6.4% | |
| May 2024 | +10.3% | |
| Apr 2024 | -4.8% | |
| Mar 2024 | +22.6% | |
| Feb 2024 | -21.8% | |
| Jan 2024 | +7.0% | |
| Dec 2023 | +8.0% | |
| Nov 2023 | +28.0% | |
| Oct 2023 | -7.5% | |
| Sep 2023 | -15.3% | |
| Aug 2023 | +18.3% | |
| Jul 2023 | +22.8% | |
| Jun 2023 | -43.8% | |
| May 2023 | +8.0% | |
| Apr 2023 | -0.4% | |
| Mar 2023 | -9.8% | |
| Feb 2023 | -7.0% | |
| Jan 2023 | +15.0% | |
| Dec 2022 | -0.2% | |
| Nov 2022 | -7.6% | |
| Oct 2022 | -2.1% | |
| Sep 2022 | -10.1% | |
| Aug 2022 | +3.7% | |
| Jul 2022 | +27.4% | |
| Jun 2022 | -1.4% | |
| May 2022 | -0.3% | |
| Apr 2022 | -50.2% | |
| Mar 2022 | +3.6% | |
| Feb 2022 | +0.1% | |
| Jan 2022 | +0.9% | |
| Dec 2021 | +3.7% | |
| Nov 2021 | -33.7% | |
| Oct 2021 | -6.2% | |
| Sep 2021 | -13.3% | |
| Aug 2021 | +9.8% | |
| Jul 2021 | -4.7% | |
| Jun 2021 | +22.4% | |
| May 2021 | -13.2% | |
| Apr 2021 | +0.8% | |
| Mar 2021 | -10.0% | |
| Feb 2021 | +13.8% | |
| Jan 2021 | -0.5% | |
| Dec 2020 | +41.2% | |
| Nov 2020 | +2.4% | |
| Oct 2020 | -9.8% | |
| Sep 2020 | +12.5% | |
| Aug 2020 | +18.1% | |
| Jul 2020 | +2.7% | |
| Jun 2020 | -1.9% | |
| May 2020 | +24.2% | |
| Apr 2020 | +3.8% | |
| Mar 2020 | -0.4% | |
| Feb 2020 | -2.9% | |
| Jan 2020 | -10.3% | |
| Dec 2019 | +27.6% | |
| Nov 2019 | +14.4% | |
| Oct 2019 | +30.1% | |
| Sep 2019 | -35.2% | |
| Aug 2019 | +42.1% |
Monthly total return (since Nov 2021)#
-40%-20%0%20%40%
Nov 2021-34%
Dec 2021+3.7%
Jan 2022+0.89%2022
Feb 2022+0.09%
Mar 2022+3.6%
Apr 2022-50%
May 2022-0.31%
Jun 2022-1.4%
Jul 2022+27%
Aug 2022+3.7%
Sep 2022-10%
Oct 2022-2.1%
Nov 2022-7.6%
Dec 2022-0.21%
Jan 2023+15%2023
Feb 2023-7.0%
Mar 2023-9.8%
Apr 2023-0.4%
May 2023+8.0%
Jun 2023-44%
Jul 2023+23%
Aug 2023+18%
Sep 2023-15%
Oct 2023-7.5%
Nov 2023+28%
Dec 2023+8.0%
Jan 2024+7.0%2024
Feb 2024-22%
Mar 2024+23%
Apr 2024-4.8%
May 2024+10%
Jun 2024-6.4%
Jul 2024+11%
Aug 2024+23%
Sep 2024-3.9%
Oct 2024+22%
Nov 2024-13%
Dec 2024-12%
Jan 2025+6.1%2025
Feb 2025-23%
Mar 2025-7.7%
Apr 2025+0.15%
May 2025-20%
Jun 2025+28%
Jul 2025-26%
Aug 2025+58%
Sep 2025-5.2%
Oct 2025+12%
Nov 2025+57%
Dec 2025-2.6%
Jan 2026+1.3%2026
Feb 2026-25%
Mar 2026-17%
Apr 2026-0.24%
May 2026-14%
Jun 2026+13%
Jul 2026+17%
Aug 2026+18%
Sep 2026+7.6%
Oct 2026-6.7%
Castle Biosciences Inc. returns by calendar month#
Every month of every year since 2020, one tick per year on a shared scale; the dark bar is the month's average. Total returns, dividends reinvested.
October 2026 so far: -6.70% — 5th of 7 Octobers since 2020 at the last close; the average October returned +1.3%.
| Month | −60%0+60% | Average | Median | Up | Best | Worst |
|---|---|---|---|---|---|---|
| Jan | +2.8% | +1.3% | 71% | +15.0% 2023 | -10.3% 2020 | |
| Feb | -9.4% | -7.0% | 29% | +13.8% 2021 | -24.9% 2026 | |
| Mar | -2.7% | -7.7% | 29% | +22.6% 2024 | -17.0% 2026 | |
| Apr | -7.3% | -0.2% | 43% | +3.8% 2020 | -50.2% 2022 | |
| May | -0.8% | -0.3% | 43% | +24.2% 2020 | -20.3% 2025 | |
| Jun | +1.4% | -1.4% | 43% | +27.9% 2025 | -43.8% 2023 | |
| Jul | +7.2% | +10.8% | 71% | +27.4% 2022 | -25.8% 2025 | |
| Aug | +21.3% | +18.1% | 100% | +58.5% 2025 | +3.7% 2022 | |
| Sep | -3.9% | -5.2% | 29% | +12.5% 2020 | -15.3% 2023 | |
| Oct | +1.3% | -4.2% | 33% | +21.6% 2024 | -9.8% 2020 | |
| Nov | +5.5% | -2.6% | 50% | +56.7% 2025 | -33.7% 2021 | |
| Dec | +6.3% | +1.8% | 50% | +41.2% 2020 | -12.0% 2024 |
Methodology#
Monthly returns are total returns (dividends reinvested), computed from CSTL's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.
FAQ#
- What is Castle Biosciences Inc.'s average monthly return?
- Castle Biosciences Inc. (CSTL) has averaged about 1.62% per month, positive in roughly 49% of months. The best month was Aug 2025 (+58.5%) and the worst was Apr 2022 (-50.2%).
More on Castle Biosciences Inc.
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