BSX Options History — May 2025

In May 2025, BSX traded between $102.51 and $106.52. ATM implied volatility averaged 22.7%, placing in the 20.4% IV rank vs the trailing year. The 30-day expected move averaged 6.4%. IV traded below realized volatility by 2.3% (HV 20d: 25.0%). Max pain ranged from $95.00 to $100.00. Net GEX was positive for 21 of 21 trading days. Term structure was in contango for 13 of 21 days. Put/call ratio averaged 1.11.

Notable Days

2025-05-20: Highest Volume — 31,238 contracts
2025-05-02: Largest IV drop — 17.7% change
2025-05-01: Highest IV Rank — 32.1%
2025-05-22: Largest Expected Move — 7.0%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$104.53	$102.51	$106.52	$103.72	$105.00
Max Pain	$98.21	$95.00	$100.00	$97.50	$100.00
ATM IV	22.7%	18.6%	27.0%	27.0%	21.9%
Expected Move	6.4%	6.0%	7.0%	6.9%	6.1%
HV 20d	25.0%	14.3%	51.2%	51.2%	15.2%
HV 60d	36.0%	35.5%	36.5%	36.1%	35.5%
IV Rank	20.4%	9.6%	32.1%	32.1%	18.5%
IV Percentile	54.1%	19.4%	82.5%	82.5%	46.4%
Term Structure	-0.0%	-4.4%	2.3%	-2.9%	0.4%
VWIV	23.5%	19.7%	29.8%	24.7%	22.4%
Skew 25d	5.0%	3.1%	11.5%	4.6%	3.9%
Skew 10d	10.5%	-4.7%	20.0%	-4.7%	16.1%
Call IV 25d	20.1%	13.9%	22.3%	21.1%	20.4%
Put IV 25d	25.2%	22.3%	30.5%	25.7%	24.3%
Bid-Ask Spread %	70.46	55.35	82.94	55.35	59.03
Gamma HHI	0.22	0.15	0.29	0.16	0.23
Net GEX	39.4M	22.5M	60.4M	45.6M	40.4M
Net DEX	-601.4M	-814.0M	-477.0M	-683.8M	-533.1M
Net VEX	-3.1M	-3.3M	-3.0M	-3.3M	-3.0M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.11	0.15	2.69	0.24	1.10
Total Volume	9,629.667	3,730	31,238	4,530	6,547
Total OI	267,939.667	233,566	305,395	275,561	250,336

Daily Data (21 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
2025-05-01	$103.72	$97.50	27.0%	6.9%	51.2%	32.1%	24.7%	4.6%	-2.9%	45.6M	-683.8M	-3.3M	0.24	55.35	N/A	N/A	3,639	891	159,437	116,124
2025-05-02	$105.12	$97.50	22.3%	6.4%	50.9%	19.3%	21.8%	4.3%	0.3%	48.8M	-796.7M	-3.3M	0.35	63.26	N/A	N/A	5,171	1,823	161,648	116,521
2025-05-05	$104.42	$95.00	23.6%	6.7%	40.1%	22.9%	26.3%	4.5%	0.0%	45.1M	-684.6M	-3.2M	1.48	80.34	N/A	N/A	6,719	9,971	152,974	115,895
2025-05-06	$104.42	$97.50	24.6%	6.8%	40.2%	25.5%	29.8%	4.8%	-0.0%	44.7M	-660.8M	-3.3M	2.69	79.25	N/A	N/A	1,986	5,352	157,295	124,443
2025-05-07	$104.81	$97.50	23.1%	6.6%	38.4%	21.7%	24.0%	11.5%	0.4%	47.8M	-683.9M	-3.3M	1.79	82.94	N/A	N/A	1,337	2,393	157,326	129,063
2025-05-08	$103.63	$97.50	23.7%	6.7%	28.5%	23.3%	24.3%	4.4%	0.8%	40.3M	-593.4M	-3.3M	2.11	78.49	N/A	N/A	2,217	4,679	157,770	130,773
2025-05-09	$102.80	$97.50	23.5%	6.5%	21.3%	22.7%	23.9%	4.5%	0.6%	32.9M	-515.6M	-3.3M	0.99	76.21	N/A	N/A	2,363	2,335	158,380	133,624
2025-05-12	$102.51	$97.50	21.9%	6.0%	21.0%	18.5%	22.1%	4.1%	-1.1%	32.0M	-477.0M	-3.0M	0.93	77.57	N/A	N/A	3,135	2,911	155,933	133,481
2025-05-13	$103.45	$97.50	23.9%	6.2%	21.0%	23.6%	23.3%	9.2%	-0.2%	38.1M	-558.4M	-3.1M	0.89	80.66	N/A	N/A	5,552	4,918	156,985	134,994
2025-05-14	$102.79	$97.50	22.4%	6.1%	21.1%	19.7%	22.8%	5.0%	-1.1%	35.2M	-516.3M	-3.0M	0.76	78.56	N/A	N/A	7,635	5,825	161,302	134,089
2025-05-15	$104.78	$97.50	18.6%	6.2%	21.8%	9.6%	20.7%	3.3%	2.3%	60.4M	-707.4M	-3.1M	0.28	82.54	N/A	N/A	4,943	1,366	165,177	139,101
2025-05-16	$105.81	$97.50	20.6%	6.0%	21.8%	15.0%	20.8%	3.1%	0.3%	55.0M	-814.0M	-3.0M	0.15	79.36	N/A	N/A	24,111	3,577	165,887	139,508
2025-05-19	$106.52	$97.50	21.0%	6.0%	19.8%	16.1%	19.7%	4.1%	1.3%	31.2M	-626.2M	-3.0M	0.20	65.47	N/A	N/A	9,571	1,940	127,440	108,470
2025-05-20	$106.25	$97.50	21.2%	6.1%	19.7%	16.7%	27.5%	4.3%	0.0%	34.7M	-622.2M	-3.1M	2.52	66.13	N/A	N/A	8,881	22,357	135,837	109,678
2025-05-21	$104.70	$100.00	22.6%	6.5%	17.2%	20.3%	23.3%	4.9%	0.3%	30.7M	-522.3M	-3.1M	1.08	63.78	N/A	N/A	2,488	2,680	137,461	96,105
2025-05-22	$104.71	$100.00	24.0%	7.0%	14.3%	24.1%	23.0%	4.6%	-4.4%	29.0M	-518.6M	-3.0M	0.68	69.74	N/A	N/A	3,547	2,395	137,792	97,223
2025-05-23	$104.60	$100.00	22.8%	6.5%	14.3%	20.9%	26.2%	4.8%	-0.0%	22.5M	-504.1M	-3.1M	2.30	61.19	N/A	N/A	2,729	6,270	140,742	98,917
2025-05-27	$106.10	$100.00	21.7%	6.1%	15.0%	18.0%	21.4%	4.1%	2.0%	39.6M	-621.6M	-3.0M	0.28	62.71	N/A	N/A	4,512	1,282	139,176	100,909
2025-05-28	$104.59	$100.00	22.7%	6.3%	16.0%	20.6%	22.0%	8.6%	-0.0%	36.7M	-505.7M	-3.0M	1.59	56.45	N/A	N/A	2,014	3,205	141,700	101,300
2025-05-29	$104.36	$100.00	22.5%	6.5%	15.8%	20.1%	23.0%	3.3%	0.5%	35.9M	-483.5M	-3.0M	0.82	60.72	N/A	N/A	3,826	3,130	142,421	103,496
2025-05-30	$105.00	$100.00	21.9%	6.1%	15.2%	18.5%	22.4%	3.9%	0.4%	40.4M	-533.1M	-3.0M	1.10	59.03	N/A	N/A	3,114	3,433	144,912	105,424