COST Options History — July 2025

In July 2025, COST traded between $926.90 and $989.69. ATM implied volatility averaged 19.6%, placing in the 10.1% IV rank vs the trailing year. The 30-day expected move averaged 5.6%. IV traded above realized volatility by 6.4% (HV 20d: 13.2%). Max pain ranged from $965.00 to $987.50. Net GEX was positive for 2 of 22 trading days. Term structure was in contango for 18 of 22 days. Put/call ratio averaged 0.71.

Notable Days

2025-07-10: Highest Volume — 55,819 contracts
2025-07-07: Largest IV spike — 6.7% change
2025-07-07: Highest IV Rank — 14.2%
2025-07-07: Largest Expected Move — 6.1%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$959.02	$926.90	$989.69	$985.51	$943.30
Max Pain	$972.16	$965.00	$987.50	$987.50	$965.00
ATM IV	19.6%	18.6%	20.8%	19.5%	19.4%
Expected Move	5.6%	5.1%	6.1%	5.5%	5.8%
HV 20d	13.2%	8.6%	19.9%	19.8%	11.5%
HV 60d	19.8%	16.6%	26.6%	26.6%	17.0%
IV Rank	10.1%	6.1%	14.2%	9.6%	9.2%
IV Percentile	14.8%	4.4%	26.6%	14.3%	13.1%
Term Structure	0.3%	-0.3%	0.9%	0.6%	0.5%
VWIV	20.0%	18.4%	21.8%	19.8%	20.7%
Skew 25d	1.9%	0.8%	3.2%	1.9%	3.2%
Skew 10d	3.1%	-5.5%	11.1%	-5.5%	3.7%
Call IV 25d	19.0%	17.8%	19.9%	19.1%	19.5%
Put IV 25d	20.9%	19.6%	22.7%	21.0%	22.7%
Bid-Ask Spread %	53.87	48.93	61.11	61.11	57.53
Gamma HHI	0.05	0.03	0.20	0.03	0.03
Net GEX	-127.4M	-325.5M	50.9M	-13.6M	9.0M
Net DEX	-27.1M	-1.46B	1.30B	-1.12B	-100.2M
Net VEX	-25.2M	-26.8M	-24.4M	-25.6M	-26.8M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.71	0.46	1.07	0.71	0.46
Total Volume	33,019	21,179	55,819	23,241	44,384
Total OI	252,032.5	229,136	279,151	235,241	268,118

Daily Data (22 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 Vol	Put Vol	Call OI	Put OI
2025-07-01	$985.51	$987.50	19.5%	5.5%	19.8%	9.6%	19.8%	1.9%	0.6%	-13.6M	-1.12B	-25.6M	0.71	61.11	13,570	9,671	111,629	123,612
2025-07-02	$982.84	$987.50	19.5%	5.4%	19.7%	9.5%	19.3%	2.0%	0.9%	-46.4M	-954.1M	-25.3M	0.76	60.56	14,076	10,656	114,635	125,934
2025-07-03	$986.76	$975.00	19.4%	5.8%	19.9%	9.3%	20.8%	2.3%	0.4%	50.9M	-1.37B	-24.9M	0.95	49.61	10,834	10,345	117,611	128,550
2025-07-07	$989.69	$975.00	20.8%	6.1%	14.1%	14.2%	21.8%	2.5%	0.5%	-2.0M	-1.46B	-24.8M	0.73	49.42	16,287	11,942	107,382	121,754
2025-07-08	$985.22	$980.00	20.3%	6.0%	14.0%	12.6%	21.5%	3.1%	0.4%	-15.5M	-1.18B	-24.9M	0.55	52.33	14,576	8,052	112,646	126,611
2025-07-09	$979.88	$980.00	20.7%	6.0%	13.9%	14.0%	21.1%	1.7%	0.1%	-69.6M	-853.2M	-24.4M	0.71	48.93	21,288	15,140	115,646	129,521
2025-07-10	$974.89	$975.00	19.9%	5.8%	14.0%	11.2%	20.4%	1.9%	0.3%	-196.5M	-511.1M	-24.9M	1.07	52.26	26,990	28,829	121,362	140,835
2025-07-11	$970.36	$975.00	19.8%	5.7%	13.7%	10.8%	20.3%	0.8%	0.1%	-325.5M	-208.6M	-25.2M	0.85	54.08	26,082	22,267	126,885	143,643
2025-07-14	$978.77	$970.00	19.9%	5.7%	13.9%	10.9%	20.4%	1.0%	0.1%	-13.8M	-1.13B	-25.0M	0.80	52.34	15,580	12,439	115,268	129,273
2025-07-15	$968.49	$970.00	20.0%	5.7%	13.6%	11.5%	20.3%	1.1%	0.1%	-91.3M	-371.0M	-25.1M	0.70	49.77	16,667	11,648	119,369	132,904
2025-07-16	$951.63	$970.00	20.1%	5.8%	14.7%	11.8%	20.4%	1.3%	-0.0%	-235.4M	840.3M	-24.9M	0.71	52.14	30,245	21,363	123,460	137,228
2025-07-17	$951.88	$970.00	19.2%	5.5%	14.7%	8.6%	19.3%	1.7%	0.2%	-255.0M	514.8M	-25.4M	0.69	51.61	22,528	15,520	132,142	142,038
2025-07-18	$950.66	$970.00	19.2%	5.5%	14.7%	8.5%	19.4%	1.7%	0.4%	-291.5M	425.7M	-25.6M	0.83	49.46	21,884	18,245	136,254	142,897
2025-07-21	$947.98	$970.00	19.3%	5.5%	14.7%	8.9%	19.5%	1.9%	0.4%	-109.6M	302.5M	-25.1M	0.67	50.27	17,059	11,440	111,277	119,652
2025-07-22	$942.38	$970.00	19.5%	5.5%	10.1%	9.5%	19.4%	1.9%	-0.0%	-145.0M	688.7M	-25.4M	0.53	51.61	17,418	9,263	117,846	124,775
2025-07-23	$941.64	$970.00	19.2%	5.4%	10.0%	8.5%	19.3%	1.9%	0.6%	-156.8M	726.4M	-25.3M	0.53	52.98	15,538	8,260	122,379	127,704
2025-07-24	$936.36	$967.50	19.1%	5.4%	9.0%	8.2%	19.1%	2.0%	0.5%	-231.7M	1.13B	-25.3M	0.69	57.28	18,965	13,175	125,097	129,479
2025-07-25	$935.31	$965.00	18.6%	5.1%	9.0%	6.1%	18.4%	1.8%	-0.3%	-194.8M	971.7M	-25.2M	0.81	58.61	20,536	16,590	130,353	131,539
2025-07-28	$933.11	$965.00	19.1%	5.4%	8.6%	8.0%	19.1%	1.8%	0.1%	-154.2M	960.7M	-25.3M	0.74	55.67	14,556	10,735	119,699	123,369
2025-07-29	$934.88	$965.00	19.9%	5.7%	8.7%	11.1%	20.3%	1.6%	-0.1%	-140.8M	784.5M	-25.8M	0.55	56.77	21,130	11,542	125,229	128,174
2025-07-30	$926.90	$965.00	19.8%	5.6%	8.9%	10.5%	20.1%	1.9%	0.2%	-173.2M	1.30B	-25.4M	0.50	60.78	19,441	9,662	131,002	129,934
2025-07-31	$943.30	$965.00	19.4%	5.8%	11.5%	9.2%	20.7%	3.2%	0.5%	9.0M	-100.2M	-26.8M	0.46	57.53	30,368	14,016	134,492	133,626