COST Options History — April 2023

In April 2023, COST traded between $485.19 and $510.28. ATM implied volatility averaged 20.6%, placing in the 4.0% IV rank vs the trailing year. The 30-day expected move averaged 5.7%. IV traded above realized volatility by 3.1% (HV 20d: 17.5%). Max pain ranged from $485.00 to $495.00. Net GEX was positive for 15 of 19 trading days. Term structure was in contango for 12 of 19 days. Put/call ratio averaged 0.98.

Notable Days

2023-04-06: Highest Volume — 102,181 contracts
2023-04-25: Largest IV spike — 13.1% change
2023-04-26: Highest IV Rank — 17.1%
2023-04-10: Largest Expected Move — 6.3%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$497.72	$485.19	$510.28	$497.13	$502.21
Max Pain	$491.32	$485.00	$495.00	$490.00	$495.00
ATM IV	20.6%	18.4%	23.9%	20.8%	21.4%
Expected Move	5.7%	5.2%	6.3%	5.6%	5.2%
HV 20d	17.5%	15.3%	19.4%	15.5%	19.4%
HV 60d	18.7%	17.7%	23.1%	23.1%	17.7%
IV Rank	4.0%	0.0%	17.1%	0.5%	9.4%
IV Percentile	3.2%	0.0%	19.0%	0.8%	6.0%
Term Structure	0.6%	-0.5%	2.5%	0.0%	-0.5%
VWIV	20.6%	18.6%	23.0%	20.7%	19.1%
Skew 25d	4.1%	3.5%	4.8%	4.4%	4.0%
Skew 10d	8.8%	7.5%	10.0%	9.8%	8.6%
Call IV 25d	18.9%	16.7%	22.0%	18.9%	19.6%
Put IV 25d	23.0%	20.3%	26.8%	23.4%	23.6%
Bid-Ask Spread %	5.16	3.00	10.57	3.12	4.17
Gamma HHI	0.06	0.03	0.23	0.04	0.04
Net GEX	28.9M	-145.2M	130.2M	32.4M	32.2M
Net DEX	-436.7M	-1.23B	508.1M	-389.3M	-568.8M
Net VEX	-11.2M	-11.5M	-10.9M	-11.1M	-11.3M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.98	0.54	1.40	1.24	0.87
Total Volume	33,720.895	18,824	102,181	20,629	25,027
Total OI	224,512.053	194,497	251,422	199,320	222,228

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
2023-04-03	$497.13	$490.00	20.8%	5.6%	15.5%	0.5%	20.7%	4.4%	0.0%	32.4M	-389.3M	-11.1M	1.24	3.12	9,201	11,428	91,497	107,823
2023-04-04	$496.83	$490.00	21.3%	5.8%	15.4%	2.2%	20.7%	4.4%	-0.1%	32.0M	-374.5M	-11.2M	0.92	3.54	14,189	13,018	95,119	113,739
2023-04-05	$497.76	$490.00	21.4%	5.9%	15.3%	2.3%	21.2%	4.6%	-0.1%	29.6M	-405.6M	-11.4M	1.10	4.81	12,059	13,225	99,375	118,833
2023-04-06	$485.19	$490.00	21.4%	6.2%	17.5%	2.3%	22.7%	4.3%	0.2%	-145.2M	508.1M	-11.0M	1.40	10.57	42,548	59,633	102,396	124,446
2023-04-10	$492.25	$485.00	21.8%	6.3%	15.9%	3.4%	23.0%	4.2%	0.2%	-1.7M	-182.8M	-11.3M	0.82	7.28	20,486	16,852	100,074	120,763
2023-04-11	$498.44	$490.00	20.3%	5.9%	16.2%	0.0%	22.7%	4.0%	0.3%	50.4M	-621.6M	-11.4M	1.00	5.67	15,059	15,097	104,493	126,985
2023-04-12	$490.38	$490.00	21.2%	6.1%	16.9%	3.1%	22.4%	4.4%	0.2%	-20.0M	-27.4M	-11.2M	1.36	6.60	11,594	15,722	107,396	128,788
2023-04-13	$498.07	$490.00	19.4%	5.6%	17.6%	0.0%	20.5%	3.9%	0.3%	57.2M	-629.4M	-11.3M	0.83	5.69	14,019	11,687	109,129	130,694
2023-04-14	$492.55	$490.00	19.5%	5.6%	17.9%	0.4%	20.8%	4.0%	0.1%	4.3M	-208.1M	-11.1M	1.19	7.56	14,756	17,495	112,689	133,977
2023-04-17	$493.93	$490.00	19.0%	5.5%	17.8%	0.0%	20.3%	3.9%	2.4%	23.3M	-311.7M	-10.9M	1.17	5.42	11,845	13,885	104,897	119,602
2023-04-18	$496.05	$490.00	18.7%	5.4%	17.7%	0.0%	19.0%	3.7%	2.5%	40.4M	-447.2M	-10.9M	1.32	3.00	10,369	13,714	107,511	125,200
2023-04-19	$496.18	$490.00	18.4%	5.3%	17.6%	0.0%	19.4%	3.7%	2.5%	42.2M	-421.8M	-11.0M	1.32	4.33	8,123	10,701	110,085	128,426
2023-04-20	$504.24	$490.00	19.3%	5.4%	18.4%	2.6%	19.9%	3.5%	2.5%	128.3M	-1.09B	-11.0M	0.67	4.77	43,156	28,975	112,429	130,030
2023-04-21	$506.65	$495.00	19.3%	5.3%	18.3%	2.8%	18.8%	3.5%	2.5%	130.2M	-1.23B	-11.2M	0.75	4.57	17,962	13,481	117,225	134,197
2023-04-24	$510.28	$495.00	20.1%	5.2%	17.9%	5.3%	18.6%	4.0%	-0.1%	69.5M	-971.5M	-11.0M	0.61	3.67	15,393	9,383	87,723	106,774
2023-04-25	$502.97	$495.00	22.8%	6.0%	18.7%	13.5%	21.0%	4.7%	-0.5%	33.3M	-528.2M	-11.4M	0.58	4.54	22,461	13,011	91,145	110,445
2023-04-26	$494.05	$495.00	23.9%	6.2%	19.0%	17.1%	21.4%	4.8%	-0.5%	-20.0M	81.9M	-11.5M	0.85	4.42	18,050	15,259	97,095	114,220
2023-04-27	$501.56	$495.00	21.8%	5.4%	19.4%	10.4%	19.0%	4.2%	-0.1%	30.4M	-481.7M	-11.4M	0.54	4.40	14,200	7,634	99,760	118,521
2023-04-28	$502.21	$495.00	21.4%	5.2%	19.4%	9.4%	19.1%	4.0%	-0.5%	32.2M	-568.8M	-11.3M	0.87	4.17	13,367	11,660	101,806	120,422