COST Options History — January 2021

In January 2021, COST traded between $352.99 and $380.43. ATM implied volatility averaged 22.1%, placing in the 11.8% IV rank vs the trailing year. The 30-day expected move averaged 6.2%. IV traded above realized volatility by 6.0% (HV 20d: 16.1%). Max pain ranged from $360.00 to $370.00. Net GEX was positive for 13 of 19 trading days. Term structure was in contango for 11 of 19 days. Put/call ratio averaged 0.68.

Notable Days

2021-01-19: Highest Volume — 58,932 contracts
2021-01-27: Largest IV spike — 19.5% change
2021-01-29: Highest IV Rank — 20.9%
2021-01-29: Largest Expected Move — 7.7%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$364.34	$352.99	$380.43	$380.43	$352.99
Max Pain	$366.18	$360.00	$370.00	$370.00	$362.50
ATM IV	22.1%	20.0%	29.3%	22.8%	29.3%
Expected Move	6.2%	5.6%	7.7%	6.4%	7.7%
HV 20d	16.1%	12.3%	19.6%	12.3%	19.6%
HV 60d	19.5%	19.1%	20.1%	19.3%	19.5%
IV Rank	11.8%	7.1%	20.9%	14.0%	20.9%
IV Percentile	32.2%	13.5%	72.6%	40.5%	72.6%
Term Structure	0.7%	-2.0%	4.9%	-0.5%	1.1%
VWIV	22.2%	20.2%	27.3%	23.2%	27.3%
Skew 25d	1.9%	0.3%	3.8%	3.7%	2.8%
Skew 10d	3.7%	-0.0%	8.1%	7.3%	8.1%
Call IV 25d	21.6%	19.3%	27.9%	21.9%	27.9%
Put IV 25d	23.5%	20.7%	30.8%	25.6%	30.8%
Bid-Ask Spread %	53.09	42.66	60.18	46.84	60.18
Gamma HHI	0.07	0.05	0.11	0.10	0.09
Net GEX	25.8M	-43.3M	97.6M	97.6M	-43.3M
Net DEX	-839.4M	-2.04B	11.7M	-2.04B	11.7M
Net VEX	-9.7M	-10.6M	-9.0M	-9.2M	-10.6M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.68	0.40	1.29	0.68	1.29
Total Volume	33,207.421	15,728	58,932	33,049	40,238
Total OI	256,285.842	203,357	305,252	257,180	240,989

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
2021-01-04	$380.43	$370.00	22.8%	6.4%	12.3%	14.0%	23.2%	3.7%	-0.5%	97.6M	-2.04B	-9.2M	0.68	46.84	19,706	13,343	133,093	124,087
2021-01-05	$376.26	$370.00	22.0%	6.3%	12.7%	12.7%	22.3%	2.5%	0.1%	82.7M	-1.71B	-9.3M	0.83	54.54	13,440	11,136	135,019	128,146
2021-01-06	$369.96	$370.00	22.2%	6.0%	14.1%	13.0%	21.2%	1.6%	-2.0%	34.6M	-1.19B	-9.0M	0.69	59.31	19,663	13,573	136,968	133,414
2021-01-07	$368.06	$370.00	20.4%	5.7%	13.4%	10.2%	20.7%	1.4%	-0.6%	13.5M	-1.03B	-9.0M	0.55	55.85	21,834	11,983	142,409	136,565
2021-01-08	$369.77	$370.00	20.1%	5.7%	13.1%	9.6%	20.2%	0.7%	-0.6%	41.2M	-1.22B	-9.1M	0.77	55.47	27,063	20,949	144,291	140,124
2021-01-11	$364.56	$370.00	21.8%	6.2%	13.9%	12.3%	22.0%	1.3%	-0.1%	8.8M	-866.8M	-9.1M	0.54	53.60	23,739	12,936	137,230	133,337
2021-01-12	$363.94	$370.00	21.5%	6.2%	13.7%	11.9%	21.9%	1.9%	0.1%	5.6M	-850.2M	-9.3M	0.40	52.36	27,103	10,834	146,193	140,208
2021-01-13	$368.69	$365.00	21.0%	5.9%	14.5%	11.1%	20.9%	1.3%	-0.5%	81.6M	-1.38B	-9.6M	0.47	55.79	22,906	10,801	154,638	142,570
2021-01-14	$362.82	$365.00	21.0%	6.0%	15.5%	11.1%	21.5%	1.9%	-0.2%	-5.3M	-782.0M	-9.4M	0.48	47.64	21,640	10,377	154,119	144,538
2021-01-15	$362.37	$365.00	20.8%	5.9%	15.4%	10.8%	21.0%	1.2%	-0.7%	-27.6M	-780.5M	-9.4M	0.79	56.15	16,712	13,185	156,599	148,653
2021-01-19	$354.60	$365.00	21.5%	6.2%	17.0%	11.9%	22.0%	2.2%	0.4%	-16.9M	-8.8M	-9.0M	0.74	42.66	33,832	25,100	109,198	94,159
2021-01-20	$361.51	$365.00	20.3%	5.8%	18.4%	7.8%	21.0%	1.8%	0.4%	37.1M	-613.1M	-9.9M	0.54	50.94	23,720	12,802	121,516	104,372
2021-01-21	$362.74	$360.00	20.8%	5.9%	18.4%	8.7%	21.2%	1.9%	0.6%	55.6M	-717.9M	-10.0M	0.60	49.58	15,306	9,170	126,013	105,476
2021-01-22	$362.82	$360.00	20.0%	5.6%	18.1%	7.1%	20.4%	1.7%	1.2%	43.0M	-722.3M	-9.9M	0.85	54.08	17,152	14,525	127,682	107,373
2021-01-25	$361.16	$365.00	22.2%	6.2%	18.1%	10.4%	22.1%	3.8%	2.4%	30.1M	-560.8M	-10.1M	0.76	49.43	16,746	12,766	118,190	100,861
2021-01-26	$364.97	$365.00	21.6%	6.1%	18.4%	9.5%	21.6%	2.1%	3.0%	54.6M	-845.8M	-10.5M	0.49	47.78	16,277	7,991	122,229	106,778
2021-01-27	$356.45	$365.00	25.8%	7.4%	19.1%	16.4%	26.7%	2.3%	4.9%	-425.9K	-256.5M	-10.5M	0.75	57.65	15,268	11,397	124,646	108,604
2021-01-28	$358.39	$365.00	24.8%	6.8%	19.2%	14.8%	24.0%	0.3%	4.8%	-2.3M	-385.6M	-10.6M	0.78	58.93	8,814	6,914	126,938	112,206
2021-01-29	$352.99	$362.50	29.3%	7.7%	19.6%	20.9%	27.3%	2.8%	1.1%	-43.3M	11.7M	-10.6M	1.29	60.18	17,543	22,695	127,432	113,557