MARKET IS CLOSED
Loading latest tickers...

Market Indices

S&P 500
$7,722.72
+0.73%
NASDAQ 100
$30,807.93
+1.00%
DOW JONES
$51,177.00
+0.49%
NASDAQ Composite
$27,190.86
+1.19%
RUSSELL 2000
$2,815.20
+0.90%
CBOE VIX
$15.31
-6.59%

Sector Heatmap

Technology+1.01%
Financials+0.06%
Healthcare-0.01%
Consumer Cycl+1.13%
Consumer Staples+0.25%
Energy+0.40%
Industrials+0.78%
Materials+0.66%
Real Estate+0.32%
Utilities+0.38%
Comm Services+0.35%

CSTL — Castle Biosciences, Inc. Common Stock

Nasdaq

Castle Biosciences, Inc. Common Stock

CompareBack to Screener
$35.56
+0.31(+0.87%)
O
35.56
H
35.92
L
34.75
V
167.71K
⏱️ End-of-day dataAs of Oct 2, 2026
OverviewStatisticsFinancialsHistorical DataOptionsDividend HistoryNewsChart
Underlying Price$35.56
Implied Volatility (IV)0.7%
Put / Call Ratio-
Total Options Volume2
Total Open Interest356
Selected Expiration2026-10-16

CSTL

Options Calculator
Expiration
CALLSSTRIKEPUTS
CalculatorLastChg% ChgBidAskVolOIIVStrikeLastChg% ChgBidAskVolOIIVCalculator
$0.80-1.70-$0.80$2.90250.6%$35.00ATM$2.00+0.00-$0.00$1.70-30.3%

Open Interest & Max Pain

2026-10-16
Max Pain$20.00-43.8% vs price
Call Open Interest313
Put Open Interest43
Put / Call (Open Interest)0.14
CallsPutsPrice $35.56Max painTop of chart = 247 contracts
30
35
40

Max pain is the strike where the open options would be worth the least at expiration, i.e. where option buyers as a group would lose the most. The chart shows strikes within 20% of the price. Open interest is from the last end-of-day update.