COST Options History — December 2020

In December 2020, COST traded between $361.51 and $386.23. ATM implied volatility averaged 22.0%, placing in the 13.1% IV rank vs the trailing year. The 30-day expected move averaged 6.3%. IV traded above realized volatility by 5.8% (HV 20d: 16.2%). Max pain ranged from $325.00 to $380.00. Net GEX was positive for 17 of 22 trading days. Term structure was in contango for 13 of 22 days. Put/call ratio averaged 0.63.

Notable Days

2020-12-11: Highest Volume — 68,192 contracts
2020-12-11: Largest IV drop — 11.1% change
2020-12-10: Highest IV Rank — 18.9%
2020-12-01: Largest Expected Move — 7.4%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$372.21	$361.51	$386.23	$386.23	$375.99
Max Pain	$342.73	$325.00	$380.00	$380.00	$350.00
ATM IV	22.0%	20.0%	25.5%	22.7%	20.0%
Expected Move	6.3%	5.5%	7.4%	7.4%	5.5%
HV 20d	16.2%	13.5%	23.5%	23.5%	14.0%
HV 60d	19.8%	19.2%	21.2%	21.2%	19.4%
IV Rank	13.1%	9.5%	18.9%	14.4%	9.5%
IV Percentile	34.8%	18.7%	58.7%	40.1%	18.7%
Term Structure	0.3%	-1.9%	1.7%	0.4%	0.8%
VWIV	22.7%	20.1%	26.6%	26.6%	20.1%
Skew 25d	1.3%	-0.0%	2.3%	1.2%	2.0%
Skew 10d	2.2%	-3.7%	5.8%	1.5%	5.5%
Call IV 25d	21.8%	19.2%	25.5%	22.7%	19.2%
Put IV 25d	23.1%	21.0%	26.2%	23.9%	21.2%
Bid-Ask Spread %	26.13	2.96	40.58	35.46	8.53
Gamma HHI	0.08	0.06	0.14	0.07	0.11
Net GEX	39.9M	-73.8M	135.4M	56.0M	135.4M
Net DEX	-1.27B	-1.91B	-588.4M	-1.40B	-1.91B
Net VEX	-8.8M	-9.5M	-7.6M	-7.6M	-9.5M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.63	0.39	0.96	0.59	0.62
Total Volume	36,081	18,748	68,192	39,932	18,748
Total OI	269,949.5	237,941	305,640	237,941	275,678

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
2020-12-01	$386.23	$380.00	22.7%	7.4%	23.5%	14.4%	26.6%	1.2%	0.4%	56.0M	-1.40B	-7.6M	0.59	35.46	25,102	14,830	106,011	131,930
2020-12-02	$383.73	$370.00	23.2%	7.4%	22.0%	15.3%	26.2%	1.4%	1.4%	99.2M	-1.84B	-7.8M	0.72	33.29	17,423	12,489	118,683	139,919
2020-12-03	$375.35	$325.00	23.0%	6.6%	23.5%	14.9%	23.4%	0.7%	0.5%	24.8M	-1.26B	-8.3M	0.51	40.58	36,250	18,653	132,193	144,037
2020-12-04	$372.90	$330.00	22.6%	6.6%	21.6%	14.3%	23.3%	0.6%	-0.1%	8.9M	-1.10B	-8.4M	0.59	34.75	23,194	13,732	139,088	147,195
2020-12-07	$372.89	$330.00	24.2%	6.9%	21.5%	16.8%	24.6%	0.9%	-0.4%	45.3M	-1.24B	-8.4M	0.62	35.78	22,205	13,692	121,610	133,613
2020-12-08	$377.59	$330.00	24.0%	6.8%	15.3%	16.5%	24.6%	-0.0%	-0.1%	78.9M	-1.61B	-8.4M	0.39	28.53	34,467	13,560	129,860	137,630
2020-12-09	$373.73	$330.00	23.8%	7.0%	15.7%	16.3%	25.1%	-0.0%	0.5%	65.6M	-1.43B	-9.1M	0.54	26.90	17,681	9,586	139,184	139,177
2020-12-10	$372.90	$330.00	25.5%	7.0%	14.7%	18.9%	25.2%	1.2%	-1.9%	62.7M	-1.38B	-9.2M	0.64	39.29	29,063	18,744	143,633	142,187
2020-12-11	$375.22	$335.00	22.7%	6.5%	14.7%	14.4%	23.2%	0.2%	-0.4%	71.9M	-1.61B	-8.9M	0.54	39.07	44,146	24,046	154,633	151,007
2020-12-14	$373.46	$335.00	21.9%	6.3%	14.3%	13.2%	22.6%	1.6%	0.5%	51.8M	-1.36B	-8.9M	0.72	37.93	21,023	15,169	132,221	132,437
2020-12-15	$371.54	$340.00	21.4%	6.2%	14.3%	12.4%	21.9%	1.9%	-0.9%	29.2M	-1.19B	-8.9M	0.63	36.02	15,976	10,055	137,673	136,994
2020-12-16	$369.58	$340.00	21.3%	6.1%	13.8%	12.2%	21.8%	1.7%	-0.1%	3.0M	-1.03B	-8.8M	0.74	40.42	13,172	9,757	139,960	140,966
2020-12-17	$370.04	$340.00	21.3%	6.1%	13.8%	12.3%	22.0%	1.8%	-0.1%	-8.8M	-1.06B	-8.9M	0.64	38.67	18,426	11,879	141,975	144,870
2020-12-18	$366.72	$345.00	21.6%	6.3%	14.0%	12.7%	22.0%	1.6%	-0.2%	-73.8M	-730.4M	-8.9M	0.89	26.83	16,754	14,834	143,093	148,976
2020-12-21	$365.04	$345.00	21.1%	6.1%	14.0%	11.9%	22.1%	1.5%	0.9%	-12.1M	-818.6M	-8.8M	0.96	16.87	16,495	15,876	118,203	124,342
2020-12-22	$361.51	$345.00	20.9%	6.0%	14.2%	11.1%	21.7%	1.9%	0.1%	-33.8M	-588.4M	-8.8M	0.52	2.96	21,202	11,106	122,706	127,674
2020-12-23	$362.66	$350.00	20.3%	5.8%	13.8%	9.9%	20.6%	1.6%	1.7%	-52.1M	-720.1M	-8.9M	0.68	3.52	22,951	15,654	129,375	131,809
2020-12-24	$364.54	$345.00	20.6%	5.7%	13.5%	10.5%	20.2%	1.1%	0.3%	40.0M	-931.0M	-9.1M	0.74	16.24	12,155	9,031	134,256	133,759
2020-12-28	$370.71	$345.00	20.4%	5.8%	15.2%	10.1%	20.3%	1.3%	0.9%	67.0M	-1.43B	-8.9M	0.54	10.43	36,514	19,566	127,384	123,073
2020-12-29	$372.37	$350.00	21.0%	5.9%	14.6%	11.0%	21.8%	2.3%	1.3%	99.1M	-1.59B	-9.5M	0.57	15.17	19,528	11,181	137,216	130,004
2020-12-30	$374.02	$350.00	20.1%	5.6%	13.9%	9.7%	20.4%	1.9%	0.7%	119.7M	-1.75B	-9.5M	0.55	7.54	17,958	9,909	139,652	133,003
2020-12-31	$375.99	$350.00	20.0%	5.5%	14.0%	9.5%	20.1%	2.0%	0.8%	135.4M	-1.91B	-9.5M	0.62	8.53	11,576	7,172	141,893	133,785