CSTL · IV Rank History
Castle Biosciences, Inc. Common Stock
IV Rank measures where CSTL's current 30-day implied volatility sits in its trailing 90-day distribution (0% = lowest in 90 days, 100% = highest). It's the most reliable signal for whether options on CSTL are priced rich or cheap relative to its own recent regime.
CSTL IV rank history
89 sessionsIV rank = where today's implied volatility sits in its 1-year range (0–100). Above 50 favours selling premium; the shaded band marks 50–100.
CSTL IV Rank Summary
Current
58%
Moderate — neutral regime
30-Day Avg
45%
60-Day Avg
34%
90-Day Avg
39%
90-Day Low
0%
90-Day High
100%
IV Rank is bounded 0%–100% by construction. Sustained levels above 75% historically
precede mean reversion in CSTL's implied vol; sustained sub-25% readings
often coincide with low-realized regimes ahead of catalyst events. See the
Vol Arb Screener for symbols where current IV
rank diverges most from realized volatility.
CSTL IV Rank — Last 90 Trading Days
| Date | IV Rank | Avg IV |
|---|---|---|
| 20261002 | 58% | 154.1% |
| 20261001 | 100% | 211.8% |
| 20260930 | 56% | 146.0% |
| 20260929 | 100% | 201.6% |
| 20260928 | 51% | 135.8% |
| 20260925 | 50% | 135.0% |
| 20260924 | 26% | 105.8% |
| 20260923 | 45% | 128.4% |
| 20260922 | 70% | 159.5% |
| 20260921 | 35% | 116.7% |
| 20260918 | 67% | 155.7% |
| 20260917 | 36% | 118.1% |
| 20260916 | 38% | 120.7% |
| 20260915 | 27% | 107.6% |
| 20260914 | 12% | 88.7% |
| 20260911 | 24% | 102.9% |
| 20260910 | 21% | 100.1% |
| 20260909 | 46% | 130.5% |
| 20260908 | 16% | 94.1% |
| 20260904 | 30% | 111.2% |
| 20260903 | 31% | 112.2% |
| 20260902 | 67% | 155.4% |
| 20260901 | 56% | 141.5% |
| 20260831 | 53% | 138.8% |
| 20260828 | 48% | 132.8% |
| 20260827 | 35% | 116.5% |
| 20260826 | 40% | 123.3% |
| 20260825 | 39% | 121.2% |
| 20260824 | 47% | 131.4% |
| 20260821 | 35% | 116.8% |
| 20260820 | 23% | 101.7% |
| 20260819 | 31% | 111.4% |
| 20260818 | 28% | 108.6% |
| 20260817 | 24% | 103.6% |
| 20260814 | 32% | 113.6% |
| 20260813 | 34% | 115.9% |
| 20260812 | 25% | 104.7% |
| 20260811 | 23% | 102.2% |
| 20260810 | 27% | 106.5% |
| 20260806 | 28% | 108.1% |
| 20260805 | 57% | 143.4% |
| 20260804 | 35% | 116.8% |
| 20260803 | 40% | 122.7% |
| 20260731 | 39% | 121.0% |
| 20260730 | 28% | 108.1% |
| 20260729 | 35% | 116.7% |
| 20260728 | 26% | 106.0% |
| 20260727 | 24% | 103.1% |
| 20260724 | 27% | 107.2% |
| 20260723 | 14% | 91.3% |
| 20260722 | 5% | 80.8% |
| 20260721 | 17% | 95.2% |
| 20260720 | 14% | 91.2% |
| 20260716 | 3% | 78.5% |
| 20260715 | 3% | 78.4% |
| 20260714 | 0% | 74.4% |
| 20260713 | 7% | 85.1% |
| 20260710 | 7% | 85.3% |
| 20260709 | 0% | 76.4% |
| 20260708 | 5% | 86.5% |
| 20260707 | 3% | 84.2% |
| 20260706 | 0% | 80.4% |
| 20260702 | 100% | 195.2% |
| 20260701 | 79% | 161.1% |
| 20260630 | 59% | 141.3% |
| 20260629 | 100% | 182.9% |
| 20260626 | 60% | 141.1% |
| 20260625 | 55% | 136.5% |
| 20260624 | 49% | 130.3% |
| 20260623 | 77% | 158.6% |
| 20260622 | 54% | 135.8% |
| 20260618 | 47% | 128.8% |
| 20260617 | 55% | 136.4% |
| 20260616 | 56% | 137.2% |
| 20260615 | 42% | 123.2% |
| 20260613 | 41% | 122.6% |
| 20260612 | 41% | 122.6% |
| 20260611 | 39% | 120.0% |
| 20260610 | 44% | 125.0% |
| 20260609 | 42% | 123.1% |
| 20260608 | 25% | 105.6% |
| 20260605 | 39% | 120.6% |
| 20260604 | 33% | 109.3% |
| 20260603 | 37% | 113.8% |
| 20260602 | 100% | 182.0% |
| 20260601 | 66% | 143.0% |
| 20260529 | 61% | 137.7% |
| 20260528 | 28% | 98.8% |
| 20260527 | 36% | 107.8% |
More on CSTL
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.