NBIX Options History — October 2025

In October 2025, NBIX traded between $136.37 and $148.68. ATM implied volatility averaged 39.0%, placing in the 31.6% IV rank vs the trailing year. The 30-day expected move averaged 11.5%. IV traded above realized volatility by 9.6% (HV 20d: 29.3%). Max pain ranged from $125.00 to $145.00. Net GEX was positive for 2 of 23 trading days. Term structure was in contango for 4 of 23 days. Put/call ratio averaged 1.68.

Notable Days

2025-10-29: Highest Volume — 3,148 contracts
2025-10-02: Largest IV spike — 18.5% change
2025-10-27: Highest IV Rank — 47.9%
2025-10-27: Largest Expected Move — 13.9%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$140.03	$136.37	$148.68	$136.79	$142.98
Max Pain	$131.09	$125.00	$145.00	$145.00	$135.00
ATM IV	39.0%	29.3%	48.4%	29.3%	43.0%
Expected Move	11.5%	8.4%	13.9%	8.4%	12.3%
HV 20d	29.3%	24.9%	37.3%	30.1%	37.3%
HV 60d	28.5%	25.6%	30.8%	28.9%	30.8%
IV Rank	31.6%	14.9%	47.9%	14.9%	38.6%
IV Percentile	72.3%	36.9%	90.9%	36.9%	86.5%
Term Structure	-3.8%	-13.0%	10.2%	10.2%	-3.5%
VWIV	39.8%	26.8%	51.2%	28.5%	45.2%
Skew 25d	1.9%	-4.1%	11.1%	0.6%	-1.6%
Skew 10d	4.6%	-15.4%	29.0%	10.4%	6.2%
Call IV 25d	38.1%	23.8%	48.0%	29.7%	46.5%
Put IV 25d	40.0%	25.4%	50.7%	30.2%	44.9%
Bid-Ask Spread %	86.14	70.90	100.61	99.47	87.09
Gamma HHI	0.16	0.11	0.31	0.23	0.17
Net GEX	-309.0K	-846.5K	802.4K	-538.1K	802.4K
Net DEX	-2.1M	-22.0M	6.7M	3.2M	-22.0M
Net VEX	-131.9K	-197.2K	-114.9K	-129.4K	-197.2K
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.68	0.00	15.69	2.06	0.00
Total Volume	368.739	14	3,148	49	127
Total OI	7,437.609	5,963	11,128	6,995	11,128

Daily Data (23 trading days)

Date	Price	Max Pain	ATM IV	Exp Move	HV 20d	IV Rank	VWIV	Skew 25d	Term Str	GEX	DEX	VEX	P/C	Spread %	Call Wall	Put Wall	Call Vol	Put Vol	Call OI	Put OI
2025-10-01	$136.79	$145.00	29.3%	8.4%	30.1%	14.9%	28.5%	0.6%	10.2%	-538.1K	3.2M	-129.4K	2.06	99.47	N/A	N/A	16	33	3,043	3,952
2025-10-02	$136.60	$145.00	34.6%	9.9%	28.9%	24.2%	32.6%	1.7%	4.0%	-517.2K	5.2M	-128.8K	2.85	100.61	N/A	N/A	110	314	3,047	3,975
2025-10-03	$136.37	$145.00	31.5%	9.0%	26.4%	18.8%	26.8%	11.1%	4.7%	-581.7K	6.7M	-133.1K	4.80	97.12	N/A	N/A	106	509	3,001	4,284
2025-10-06	$139.81	$125.00	31.9%	11.6%	28.2%	19.4%	41.5%	6.4%	-5.9%	-286.8K	-332.1K	-127.5K	1.83	86.85	N/A	N/A	30	55	3,098	3,974
2025-10-07	$136.43	$125.00	32.3%	10.7%	29.3%	20.2%	36.9%	5.5%	-0.9%	-404.8K	4.0M	-124.9K	1.03	81.17	N/A	N/A	60	62	3,114	4,031
2025-10-08	$139.32	$125.00	33.8%	11.2%	29.9%	22.7%	38.1%	4.2%	-4.0%	-341.6K	928.4K	-128.3K	0.00	74.45	N/A	N/A	52	0	3,159	4,078
2025-10-09	$138.99	$125.00	30.2%	10.8%	29.3%	16.6%	37.3%	4.5%	-1.9%	-401.5K	424.7K	-127.9K	0.00	79.22	N/A	N/A	18	0	3,165	4,078
2025-10-10	$137.07	$125.00	35.3%	11.1%	29.5%	25.4%	37.9%	-2.1%	-3.1%	-405.6K	2.9M	-126.7K	0.85	87.26	N/A	N/A	41	35	3,169	4,078
2025-10-13	$138.38	$125.00	41.4%	11.1%	29.6%	35.8%	37.3%	3.8%	-3.9%	-431.3K	2.4M	-124.3K	0.01	85.08	N/A	N/A	96	1	3,165	4,111
2025-10-14	$136.70	$125.00	38.9%	11.4%	29.8%	31.6%	39.6%	-0.4%	-4.7%	-500.4K	3.2M	-124.6K	5.17	89.52	N/A	N/A	6	31	3,266	4,122
2025-10-15	$138.55	$125.00	41.3%	11.8%	29.1%	35.6%	41.5%	0.7%	-6.3%	-428.6K	1.7M	-120.7K	0.00	91.91	N/A	N/A	14	0	3,268	4,151
2025-10-16	$136.97	$125.00	38.2%	11.0%	28.4%	30.4%	38.1%	-1.8%	-0.9%	-392.2K	2.8M	-123.8K	3.00	89.12	N/A	N/A	6	18	3,273	4,151
2025-10-17	$139.62	$125.00	41.8%	12.0%	29.3%	36.5%	40.1%	7.1%	-3.7%	-846.5K	1.3M	-123.6K	0.09	82.22	N/A	N/A	245	21	3,278	4,166
2025-10-20	$141.18	$125.00	39.9%	11.4%	28.8%	33.2%	39.4%	3.4%	-7.2%	-301.6K	-3.9M	-115.2K	0.14	83.71	N/A	N/A	14	2	2,262	3,701
2025-10-21	$142.65	$125.00	38.4%	11.0%	29.1%	30.7%	39.3%	3.4%	-2.9%	-280.3K	-4.5M	-114.9K	15.69	88.22	N/A	N/A	13	204	2,267	3,700
2025-10-22	$142.56	$125.00	42.0%	12.1%	29.1%	36.9%	40.6%	-1.4%	-9.2%	-406.8K	-3.8M	-116.4K	0.00	87.24	N/A	N/A	227	1	2,266	3,904
2025-10-23	$144.25	$125.00	46.4%	13.3%	24.9%	44.5%	45.9%	1.8%	-11.2%	-367.6K	-5.6M	-115.4K	0.43	83.36	N/A	N/A	753	327	2,280	3,905
2025-10-24	$143.82	$140.00	45.1%	12.9%	24.9%	42.1%	44.0%	-2.1%	-8.9%	-240.7K	-6.9M	-134.1K	0.09	86.22	N/A	N/A	252	22	3,025	4,232
2025-10-27	$148.68	$140.00	48.4%	13.9%	27.0%	47.9%	51.2%	2.1%	-13.0%	-122.4K	-13.3M	-134.9K	0.14	78.13	N/A	N/A	428	59	3,270	4,434
2025-10-28	$147.65	$140.00	48.1%	13.8%	26.8%	47.3%	48.8%	2.7%	-8.4%	-95.5K	-14.0M	-137.4K	0.19	70.90	N/A	N/A	223	42	3,374	4,490
2025-10-29	$137.79	$140.00	40.4%	11.6%	34.7%	34.1%	42.5%	-2.3%	1.1%	-336.2K	1.1M	-138.6K	0.19	89.41	N/A	N/A	2,643	505	3,547	4,523
2025-10-30	$137.54	$135.00	43.5%	12.5%	34.7%	39.3%	43.4%	-4.1%	-8.3%	317.3K	-9.2M	-185.4K	0.05	83.00	N/A	N/A	725	35	5,606	4,954
2025-10-31	$142.98	$135.00	43.0%	12.3%	37.3%	38.6%	45.2%	-1.6%	-3.5%	802.4K	-22.0M	-197.2K	0.00	87.09	N/A	N/A	127	0	6,151	4,977