COST Options History — November 2025

In November 2025, COST traded between $883.18 and $939.33. ATM implied volatility averaged 25.7%, placing in the 32.5% IV rank vs the trailing year. The 30-day expected move averaged 7.6%. IV traded above realized volatility by 8.4% (HV 20d: 17.3%). Max pain ranged from $920.00 to $930.00. Net GEX was positive for 8 of 19 trading days. Term structure was in contango for 5 of 19 days. Put/call ratio averaged 0.86.

Notable Days

2025-11-19: Highest Volume — 94,766 contracts
2025-11-06: Largest IV spike — 11.7% change
2025-11-19: Highest IV Rank — 46.7%
2025-11-19: Largest Expected Move — 8.5%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$912.31	$883.18	$939.33	$926.92	$912.80
Max Pain	$924.74	$920.00	$930.00	$922.50	$920.00
ATM IV	25.7%	20.0%	29.6%	22.3%	25.6%
Expected Move	7.6%	6.2%	8.5%	6.3%	8.1%
HV 20d	17.3%	13.9%	20.2%	19.7%	18.0%
HV 60d	18.0%	17.3%	18.5%	18.0%	18.2%
IV Rank	32.5%	11.5%	46.7%	19.8%	32.1%
IV Percentile	72.0%	29.0%	94.8%	49.2%	67.9%
Term Structure	0.2%	-1.7%	4.5%	2.5%	-0.4%
VWIV	27.0%	22.6%	30.0%	22.6%	28.5%
Skew 25d	1.3%	0.7%	2.6%	1.0%	0.7%
Skew 10d	1.8%	-1.1%	4.3%	4.3%	2.2%
Call IV 25d	25.3%	20.3%	29.5%	21.8%	26.4%
Put IV 25d	26.6%	21.7%	30.7%	22.8%	27.1%
Bid-Ask Spread %	42.11	31.62	59.10	57.13	46.99
Gamma HHI	0.05	0.03	0.13	0.03	0.10
Net GEX	-19.8M	-335.7M	312.4M	1.1M	312.4M
Net DEX	-564.4M	-2.43B	1.71B	-1.30B	-1.57B
Net VEX	-30.4M	-31.8M	-28.8M	-31.5M	-29.6M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.86	0.54	1.30	0.54	0.65
Total Volume	40,965.895	21,936	94,766	38,746	28,219
Total OI	304,166.474	277,406	338,357	282,455	307,946

Daily Data (19 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
2025-11-03	$926.92	$922.50	22.3%	6.3%	19.7%	19.8%	22.6%	1.0%	2.5%	1.1M	-1.30B	-31.5M	0.54	57.13	25,132	13,614	147,111	135,344
2025-11-04	$939.33	$922.50	21.9%	6.3%	20.2%	18.4%	22.8%	1.4%	3.6%	123.8M	-2.43B	-31.8M	0.57	57.60	21,794	12,344	155,630	140,378
2025-11-05	$938.13	$925.00	20.0%	6.2%	20.2%	11.5%	23.0%	0.8%	4.5%	123.5M	-2.33B	-30.9M	0.79	59.10	17,979	14,144	156,915	142,159
2025-11-06	$921.11	$930.00	22.4%	7.4%	18.4%	20.1%	26.1%	0.9%	4.1%	-17.8M	-814.8M	-31.1M	0.70	31.62	26,641	18,628	160,738	143,444
2025-11-07	$923.83	$930.00	23.2%	7.3%	18.3%	23.2%	25.5%	1.4%	3.1%	105.5M	-1.32B	-30.8M	0.69	45.61	21,222	14,693	165,464	147,163
2025-11-10	$915.75	$930.00	25.2%	7.5%	18.5%	30.5%	26.6%	1.4%	-0.0%	-91.7M	-407.5M	-29.9M	0.85	39.27	22,926	19,495	146,720	133,368
2025-11-11	$914.32	$930.00	25.5%	7.3%	18.1%	31.7%	25.7%	0.9%	-0.4%	-131.7M	-360.6M	-30.4M	1.17	32.34	10,126	11,810	154,197	143,975
2025-11-12	$914.27	$930.00	26.2%	7.4%	17.5%	34.1%	26.1%	1.0%	-0.2%	-159.0M	-315.0M	-30.2M	1.04	33.54	10,803	11,235	156,276	148,829
2025-11-13	$924.40	$930.00	27.2%	7.6%	14.4%	38.1%	26.9%	1.4%	-1.1%	-5.7M	-1.32B	-30.6M	0.77	36.78	20,296	15,586	159,213	152,378
2025-11-14	$924.20	$925.00	26.3%	7.4%	13.9%	34.6%	26.5%	2.3%	-0.6%	188.6M	-1.35B	-30.6M	0.73	37.26	27,132	19,695	162,684	153,630
2025-11-17	$909.36	$925.00	27.6%	7.9%	15.0%	39.5%	27.8%	1.2%	-1.6%	-130.1M	-215.0M	-29.8M	1.00	38.13	17,182	17,174	153,366	139,117
2025-11-18	$895.75	$925.00	28.9%	8.3%	15.6%	44.3%	29.7%	0.9%	-1.7%	-264.4M	1.02B	-30.2M	1.28	37.43	22,349	28,682	158,046	147,756
2025-11-19	$888.56	$925.00	29.6%	8.5%	15.3%	46.7%	30.0%	0.9%	-1.3%	-335.7M	1.71B	-30.2M	1.30	34.66	41,154	53,612	165,537	153,329
2025-11-20	$897.69	$920.00	29.1%	8.4%	16.0%	45.0%	29.8%	1.6%	-1.5%	-121.5M	427.0M	-31.0M	0.84	43.02	25,019	21,052	177,736	158,157
2025-11-21	$901.43	$920.00	28.1%	8.2%	15.8%	41.2%	29.5%	2.1%	-1.6%	102.5M	-109.3M	-30.0M	0.83	46.10	28,145	23,314	181,949	156,408
2025-11-24	$883.18	$920.00	26.8%	8.1%	17.2%	36.6%	28.7%	1.3%	-1.0%	-158.7M	1.01B	-28.8M	0.96	42.07	23,404	22,427	143,351	134,055
2025-11-25	$894.42	$920.00	27.0%	8.1%	18.0%	37.1%	28.8%	2.6%	-1.5%	-55.5M	99.5M	-29.7M	0.89	40.87	15,632	13,856	155,365	141,826
2025-11-26	$908.48	$920.00	26.0%	8.1%	18.4%	33.6%	28.6%	1.2%	-0.9%	137.7M	-1.16B	-29.9M	0.72	40.66	24,301	17,535	157,826	141,777
2025-11-28	$912.80	$920.00	25.6%	8.1%	18.0%	32.1%	28.5%	0.7%	-0.4%	312.4M	-1.57B	-29.6M	0.65	46.99	17,132	11,087	163,961	143,985