This page reflects GMAB options positioning from the latest published market-close snapshot. Intraday price and contract changes are not displayed.
Published Snapshot
Aug 18, 2026 close
GMAB Options Chain
Data as of market close Aug 18, 2026
Compare calls and puts side by side with OI, volume, IV, and positioning context.
Control Row
Next expiry (DTE 3)
Blank greek cells usually mean usable implied volatility was unavailable for that contract in the market-close snapshot.
Open Interest by Strike
IV Skew
Volume by Strike
Calls
Strike
Last
Bid
Ask
Chg
Vol
OI
IV
Delta
Gamma
Theta
Vega
Rho
17.50
7.65
0.00
0.00
0.00
2
0
0.0%
1.000
0.0000
-0.002
0.000
0.001
20.00
9.70
10.80
15.00
0.00
1
66
618.8%
0.879
0.0109
-0.621
0.006
0.001
22.50
6.80
8.30
12.30
0.00
6
11
493.0%
0.860
0.0151
-0.549
0.007
0.001
25.00
6.25
5.80
10.00
0.00
3
16
423.6%
0.819
0.0208
-0.557
0.008
0.001
30.00
3.00
2.35
3.40
0.15
29
10,431
111.9%
0.837
0.0737
-0.140
0.007
0.002
35.00
0.05
0.00
0.40
-0.10
1
3,022
60.7%
0.145
0.1258
-0.070
0.007
0.000
40.00
0.41
0.00
0.55
0.00
1
11,142
146.7%
0.083
0.0348
-0.112
0.005
0.000
45.00
0.35
0.00
0.65
0.00
2
848
214.5%
0.066
0.0201
-0.138
0.004
0.000
50.00
0.15
0.00
0.80
0.00
1
165
277.9%
0.063
0.0150
-0.172
0.004
0.000
Puts
Strike
Last
Bid
Ask
Chg
Vol
OI
IV
Delta
Gamma
Theta
Vega
Rho
15.00
0.25
0.00
0.25
0.00
2
7
410.9%
-0.011
0.0023
-0.058
0.001
-0.000
17.50
0.15
0.00
0.05
0.00
1
266
265.6%
-0.003
0.0011
-0.012
0.000
-0.000
20.00
0.20
0.00
0.10
0.00
3
691
235.9%
-0.007
0.0029
-0.024
0.001
-0.000
22.50
0.05
0.00
2.15
0.00
1
13
395.7%
-0.107
0.0156
-0.362
0.005
-0.000
25.00
0.15
0.00
0.30
0.00
1
1,016
175.0%
-0.034
0.0145
-0.066
0.002
-0.000
30.00
0.15
0.00
0.35
0.14
35
1,470
80.5%
-0.092
0.0684
-0.066
0.005
-0.000
35.00
2.25
0.60
4.40
0.00
15
41
85.9%
-0.766
0.1193
-0.128
0.009
-0.002
40.00
11.42
0.00
0.00
0.00
2
0
0.0%
-1.000
0.0000
0.005
0.000
-0.003
45.00
12.81
16.90
20.90
0.00
2
1
757.8%
-0.543
0.0175
-1.493
0.012
-0.003
50.00
17.40
21.80
25.80
0.00
0
1
822.1%
-0.574
0.0160
-1.600
0.012
-0.003
How to Read the Chain
Use this market-close chain snapshot to compare liquidity, pricing, IV, and per-contract greeks across the active expiration.
How to scan it
Start with strike, bid/ask spread, open interest, and volume. Then use IV and greeks to decide whether a contract fits your directional, income, or volatility idea.
What matters first
Clean fills matter before a contract looks mathematically attractive. A thin market can erase the edge you think you found.
What can mislead you
Low premium, high IV, or one convenient delta do not make a trade by themselves. Check how far the strike sits from spot, expected move, and the event calendar.
Greeks are close-of-day estimates, and blank greek cells usually mean usable implied volatility was unavailable for that contract.