COST Options History — December 2021

In December 2021, COST traded between $525.45 and $568.62. ATM implied volatility averaged 24.1%, placing in the 57.6% IV rank vs the trailing year. The 30-day expected move averaged 6.9%. IV traded below realized volatility by 3.5% (HV 20d: 27.7%). Max pain ranged from $460.00 to $510.00. Net GEX was positive for 22 of 22 trading days. Term structure was in contango for 13 of 22 days. Put/call ratio averaged 0.69.

Notable Days

2021-12-10: Highest Volume — 208,921 contracts
2021-12-10: Largest IV drop — 18.9% change
2021-12-01: Highest IV Rank — 100.0%
2021-12-03: Largest Expected Move — 10.1%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$548.74	$525.45	$568.62	$534.75	$567.66
Max Pain	$478.41	$460.00	$510.00	$510.00	$485.00
ATM IV	24.1%	19.4%	31.5%	29.5%	19.4%
Expected Move	6.9%	5.2%	10.1%	9.3%	5.2%
HV 20d	27.7%	17.4%	33.5%	19.1%	31.2%
HV 60d	22.2%	19.3%	24.6%	19.3%	22.6%
IV Rank	57.6%	28.7%	100.0%	100.0%	29.0%
IV Percentile	80.1%	45.2%	100.0%	100.0%	46.0%
Term Structure	-0.1%	-1.4%	1.2%	-1.0%	0.9%
VWIV	25.2%	19.8%	36.6%	33.2%	19.8%
Skew 25d	2.7%	1.2%	4.5%	2.8%	2.0%
Skew 10d	6.3%	2.7%	11.6%	7.0%	7.1%
Call IV 25d	23.6%	19.0%	31.2%	29.0%	19.1%
Put IV 25d	26.3%	21.1%	35.1%	31.8%	21.1%
Bid-Ask Spread %	48.98	27.76	63.87	48.85	42.49
Gamma HHI	0.09	0.05	0.37	0.06	0.15
Net GEX	115.0M	31.2M	329.4M	52.3M	204.2M
Net DEX	-3.41B	-5.41B	-2.35B	-2.76B	-3.92B
Net VEX	-11.6M	-12.6M	-10.3M	-12.3M	-10.5M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.69	0.41	0.99	0.46	0.73
Total Volume	49,073.545	25,624	208,921	43,387	30,221
Total OI	257,145.591	234,479	308,201	244,815	254,860

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
2021-12-01	$534.75	$510.00	29.5%	9.3%	19.1%	100.0%	33.2%	2.8%	-1.0%	52.3M	-2.76B	-12.3M	0.46	48.85	29,674	13,713	125,096	119,719
2021-12-02	$527.62	$510.00	28.8%	9.0%	19.9%	95.1%	32.4%	2.1%	0.4%	31.2M	-2.35B	-12.4M	0.70	48.51	18,893	13,209	128,045	121,627
2021-12-03	$527.30	$510.00	31.5%	10.1%	18.0%	100.0%	36.6%	3.9%	-1.2%	45.7M	-2.36B	-12.6M	0.71	43.23	21,565	15,226	129,226	121,929
2021-12-06	$533.04	$460.00	28.5%	7.8%	18.1%	82.5%	28.4%	4.5%	-1.3%	59.7M	-2.74B	-12.0M	0.71	44.53	19,611	13,869	119,329	117,961
2021-12-07	$540.80	$460.00	26.6%	7.3%	17.4%	71.0%	26.7%	3.7%	-0.7%	84.9M	-3.20B	-11.8M	0.77	47.85	17,130	13,175	125,429	122,056
2021-12-08	$530.01	$460.00	26.5%	7.3%	19.3%	70.7%	25.7%	2.7%	-0.8%	62.9M	-2.61B	-11.8M	0.53	46.46	43,349	22,990	129,871	125,362
2021-12-09	$525.45	$460.00	27.5%	7.5%	19.5%	76.5%	26.9%	1.7%	-1.4%	72.3M	-2.48B	-12.1M	0.73	50.02	45,300	32,895	143,366	131,128
2021-12-10	$559.66	$460.00	22.3%	6.5%	28.9%	46.1%	24.3%	1.2%	0.4%	329.4M	-5.41B	-11.3M	0.50	43.31	139,033	69,888	162,312	145,889
2021-12-13	$559.43	$465.00	22.5%	6.5%	28.9%	47.1%	24.0%	1.5%	0.4%	150.8M	-4.39B	-11.4M	0.55	55.19	38,258	20,966	137,932	125,553
2021-12-14	$545.96	$470.00	23.6%	6.9%	30.5%	53.5%	24.6%	2.5%	0.5%	93.8M	-3.43B	-11.8M	0.86	43.29	32,051	27,452	143,225	130,288
2021-12-15	$562.80	$475.00	23.4%	6.7%	31.7%	52.1%	24.1%	3.5%	0.0%	167.3M	-4.60B	-11.6M	0.41	63.87	36,880	15,067	143,599	133,175
2021-12-16	$552.50	$475.00	24.3%	7.0%	32.6%	58.0%	25.4%	2.4%	-0.2%	122.4M	-3.91B	-12.2M	0.60	53.94	29,121	17,499	149,017	135,145
2021-12-17	$549.68	$475.00	24.0%	6.8%	32.6%	55.7%	24.9%	3.2%	-0.4%	68.4M	-3.69B	-12.0M	0.87	55.42	20,694	18,036	150,569	138,532
2021-12-20	$547.67	$480.00	25.6%	7.3%	32.7%	65.3%	27.0%	3.5%	-0.8%	73.6M	-2.83B	-11.9M	0.99	53.15	12,844	12,780	120,223	114,574
2021-12-21	$543.95	$480.00	23.3%	6.7%	32.3%	52.0%	23.7%	2.6%	0.2%	58.7M	-2.67B	-12.0M	0.83	27.76	21,905	18,127	122,542	117,460
2021-12-22	$549.24	$480.00	21.8%	6.2%	32.4%	42.9%	23.1%	2.8%	0.1%	99.3M	-3.01B	-11.6M	0.78	46.47	17,263	13,410	128,056	121,305
2021-12-23	$551.46	$480.00	20.5%	5.9%	32.3%	35.5%	21.4%	2.3%	0.4%	121.1M	-3.19B	-11.1M	0.78	50.14	17,902	14,021	127,913	123,581
2021-12-27	$565.61	$485.00	21.0%	5.9%	33.5%	38.3%	21.9%	2.8%	0.2%	137.1M	-3.83B	-10.6M	0.80	59.22	20,945	16,685	118,712	115,767
2021-12-28	$564.31	$480.00	20.6%	5.8%	33.3%	36.0%	20.7%	3.1%	1.2%	140.5M	-3.75B	-10.5M	0.71	59.16	16,527	11,784	121,873	118,311
2021-12-29	$568.62	$480.00	19.9%	5.5%	32.7%	31.7%	20.5%	2.3%	0.6%	180.9M	-4.06B	-10.3M	0.49	50.64	26,390	12,867	125,287	120,485
2021-12-30	$564.76	$485.00	19.4%	5.5%	31.8%	28.7%	20.0%	2.5%	0.2%	173.2M	-3.84B	-10.5M	0.71	44.08	17,821	12,582	128,704	122,170
2021-12-31	$567.66	$485.00	19.4%	5.2%	31.2%	29.0%	19.8%	2.0%	0.9%	204.2M	-3.92B	-10.5M	0.73	42.49	17,486	12,735	129,961	124,899