BSY Options History — October 2025

In October 2025, BSY traded between $49.34 and $56.69. ATM implied volatility averaged 39.5%, placing in the 51.1% IV rank vs the trailing year. The 30-day expected move averaged 11.6%. IV traded below realized volatility by 2.2% (HV 20d: 41.7%). Max pain ranged from $45.00 to $55.00. Net GEX was positive for 23 of 23 trading days. Term structure was in contango for 3 of 23 days. Put/call ratio averaged 1.95.

Notable Days

2025-10-02: Highest Volume — 9,860 contracts
2025-10-13: Largest IV spike — 78.6% change
2025-10-14: Highest IV Rank — 86.2%
2025-10-31: Largest Expected Move — 13.1%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$51.82	$49.34	$56.69	$52.02	$50.84
Max Pain	$49.78	$45.00	$55.00	$50.00	$50.00
ATM IV	39.5%	24.6%	55.8%	29.6%	45.8%
Expected Move	11.6%	8.5%	13.1%	8.5%	13.1%
HV 20d	41.7%	20.0%	46.7%	20.0%	37.7%
HV 60d	30.0%	20.6%	32.0%	20.6%	30.6%
IV Rank	51.1%	18.9%	86.2%	29.7%	64.5%
IV Percentile	79.3%	7.5%	98.8%	54.0%	92.5%
Term Structure	-4.0%	-8.8%	6.5%	1.4%	-8.8%
VWIV	41.6%	30.2%	50.2%	30.8%	45.8%
Skew 25d	1.6%	-1.5%	3.5%	-1.5%	3.3%
Skew 10d	1.4%	-12.8%	23.6%	-10.3%	-3.2%
Call IV 25d	41.2%	30.1%	47.0%	30.1%	45.9%
Put IV 25d	42.9%	28.7%	49.3%	28.7%	49.2%
Bid-Ask Spread %	78.65	59.41	91.55	59.41	84.96
Gamma HHI	0.29	0.25	0.32	0.29	0.29
Net GEX	3.5M	1.2M	7.4M	3.8M	2.6M
Net DEX	-48.6M	-124.8M	-20.4M	-54.7M	-29.8M
Net VEX	-315.3K	-500.0K	-211.9K	-333.6K	-211.9K
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.95	0.01	11.60	0.52	1.33
Total Volume	1,474.565	53	9,860	170	112
Total OI	68,954.87	61,990	75,459	61,990	66,795

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	$52.02	$50.00	29.6%	8.5%	20.0%	29.7%	30.8%	-1.5%	1.4%	3.8M	-54.7M	-333.6K	0.52	59.41	N/A	N/A	112	58	56,173	5,817
2025-10-02	$55.81	$50.00	29.9%	8.6%	32.4%	30.4%	30.2%	0.7%	6.5%	5.9M	-98.3M	-448.3K	0.04	88.19	N/A	N/A	9,447	413	56,145	5,884
2025-10-03	$55.62	$55.00	30.1%	8.6%	32.4%	30.9%	30.7%	1.4%	5.9%	6.9M	-104.3M	-463.6K	0.02	91.55	N/A	N/A	971	23	61,593	6,222
2025-10-06	$56.69	$45.00	34.9%	10.8%	32.9%	41.1%	37.4%	1.3%	-3.2%	7.4M	-124.8M	-500.0K	0.06	67.73	N/A	N/A	1,851	109	61,919	6,232
2025-10-07	$52.81	$45.00	33.2%	11.2%	41.6%	37.5%	38.8%	1.3%	-3.4%	5.0M	-70.0M	-387.9K	7.07	76.49	N/A	N/A	455	3,215	62,893	6,314
2025-10-08	$50.69	$50.00	39.9%	11.6%	43.8%	51.9%	41.1%	0.8%	-3.4%	3.1M	-37.4M	-326.9K	1.47	76.57	N/A	N/A	2,253	3,304	63,024	8,607
2025-10-09	$50.57	$50.00	37.2%	12.6%	43.3%	46.1%	44.1%	2.1%	-4.1%	2.6M	-36.4M	-346.0K	1.26	73.64	N/A	N/A	322	407	64,833	9,876
2025-10-10	$49.34	$50.00	24.6%	12.7%	44.0%	18.9%	44.1%	3.5%	-3.9%	1.2M	-20.4M	-297.7K	3.09	85.07	N/A	N/A	135	417	64,733	10,201
2025-10-13	$51.00	$50.00	43.9%	12.2%	45.8%	60.5%	42.9%	2.5%	-3.8%	2.6M	-37.8M	-329.1K	0.63	69.55	N/A	N/A	239	150	64,762	10,115
2025-10-14	$50.34	$50.00	55.8%	13.1%	45.9%	86.2%	45.2%	1.8%	-5.7%	2.3M	-29.7M	-301.8K	8.08	81.26	N/A	N/A	53	428	64,879	10,042
2025-10-15	$50.77	$50.00	43.6%	12.5%	45.8%	59.8%	43.7%	2.6%	-5.3%	1.8M	-31.8M	-311.7K	0.52	78.06	N/A	N/A	2,210	1,141	64,893	10,449
2025-10-16	$50.22	$50.00	40.4%	11.6%	45.8%	52.9%	40.4%	1.1%	-3.5%	1.2M	-20.9M	-274.7K	2.54	81.17	N/A	N/A	117	297	64,444	10,969
2025-10-17	$51.41	$50.00	41.2%	11.8%	46.7%	54.8%	47.6%	2.4%	-3.3%	3.4M	-39.0M	-313.8K	0.10	77.95	N/A	N/A	1,066	104	64,424	11,035
2025-10-20	$51.72	$50.00	39.2%	11.2%	45.9%	50.4%	41.4%	0.2%	-4.7%	3.2M	-42.2M	-280.0K	0.06	75.82	N/A	N/A	545	32	58,591	6,772
2025-10-21	$52.17	$50.00	40.2%	11.5%	45.0%	52.6%	40.2%	1.1%	-4.7%	3.5M	-46.7M	-283.9K	0.44	75.19	N/A	N/A	598	266	58,790	6,786
2025-10-22	$52.12	$50.00	40.3%	11.5%	45.0%	52.7%	44.0%	2.0%	-5.1%	3.5M	-45.5M	-279.7K	0.13	79.14	N/A	N/A	47	6	59,056	6,701
2025-10-23	$51.30	$50.00	40.5%	11.6%	45.3%	53.2%	41.1%	0.8%	-6.4%	3.5M	-44.9M	-284.4K	0.65	83.07	N/A	N/A	52	34	59,030	6,702
2025-10-24	$52.13	$50.00	41.9%	12.0%	45.7%	56.2%	50.2%	3.5%	-6.0%	3.5M	-45.3M	-274.6K	0.01	82.80	N/A	N/A	556	3	58,992	6,680
2025-10-27	$51.78	$50.00	44.1%	12.7%	45.7%	61.0%	43.7%	2.4%	-7.0%	3.6M	-47.4M	-284.1K	1.78	81.02	N/A	N/A	429	762	59,258	6,683
2025-10-28	$51.67	$50.00	45.4%	13.0%	45.3%	63.7%	44.1%	1.9%	-8.0%	3.5M	-44.4M	-258.8K	0.01	82.41	N/A	N/A	205	3	59,455	6,615
2025-10-29	$50.30	$50.00	45.2%	12.9%	46.0%	63.2%	45.2%	-0.3%	-8.2%	3.0M	-35.1M	-238.6K	11.60	82.67	N/A	N/A	47	545	59,447	6,615
2025-10-30	$50.51	$50.00	42.8%	12.3%	37.5%	58.0%	43.8%	3.1%	-6.7%	2.7M	-31.2M	-221.5K	3.53	75.16	N/A	N/A	83	293	59,423	7,093
2025-10-31	$50.84	$50.00	45.8%	13.1%	37.7%	64.5%	45.8%	3.3%	-8.8%	2.6M	-29.8M	-211.9K	1.33	84.96	N/A	N/A	48	64	59,431	7,364