COST Options History — April 2020

In April 2020, COST traded between $285.40 and $321.66. ATM implied volatility averaged 32.4%, placing in the 29.9% IV rank vs the trailing year. The 30-day expected move averaged 8.9%. IV traded below realized volatility by 5.5% (HV 20d: 37.9%). Max pain ranged from $300.00 to $305.00. Net GEX was positive for 19 of 21 trading days. Term structure was in contango for 8 of 21 days. Put/call ratio averaged 0.64.

Notable Days

2020-04-09: Highest Volume — 52,239 contracts
2020-04-21: Largest IV spike — 17.0% change
2020-04-01: Highest IV Rank — 45.1%
2020-04-01: Largest Expected Move — 12.2%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$305.24	$285.40	$321.66	$285.40	$303.24
Max Pain	$301.90	$300.00	$305.00	$300.00	$305.00
ATM IV	32.4%	28.4%	41.9%	41.9%	32.4%
Expected Move	8.9%	7.1%	12.2%	12.2%	7.4%
HV 20d	37.9%	33.6%	44.2%	39.5%	34.5%
HV 60d	40.0%	37.4%	41.4%	37.5%	41.4%
IV Rank	29.9%	23.5%	45.1%	45.1%	30.0%
IV Percentile	88.1%	84.5%	92.9%	92.9%	88.5%
Term Structure	0.2%	-2.5%	5.5%	-0.7%	0.2%
VWIV	31.8%	25.1%	43.5%	43.5%	27.8%
Skew 25d	5.8%	-0.8%	10.0%	5.5%	3.8%
Skew 10d	9.0%	-3.5%	19.8%	19.8%	-3.5%
Call IV 25d	29.8%	26.1%	39.9%	39.9%	30.9%
Put IV 25d	35.6%	30.6%	45.5%	45.5%	34.7%
Bid-Ask Spread %	33.89	9.56	61.58	51.49	9.56
Gamma HHI	0.07	0.04	0.14	0.04	0.05
Net GEX	34.2M	-2.9M	112.6M	-2.9M	-1.3M
Net DEX	-520.8M	-1.54B	112.7M	112.7M	-201.9M
Net VEX	-6.5M	-7.0M	-6.2M	-6.4M	-6.4M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.64	0.32	1.06	0.62	1.01
Total Volume	28,397.762	13,318	52,239	17,936	13,318
Total OI	188,437.524	162,574	211,842	185,831	183,281

Daily Data (21 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
2020-04-01	$285.40	$300.00	41.9%	12.2%	39.5%	45.1%	43.5%	5.5%	-0.7%	-2.9M	112.7M	-6.4M	0.62	51.49	11,081	6,855	92,998	92,833
2020-04-02	$288.82	$300.00	37.7%	10.9%	39.9%	38.4%	37.2%	9.0%	-2.1%	5.7M	13.7M	-6.3M	0.79	44.86	11,375	8,977	96,150	94,158
2020-04-03	$286.73	$300.00	35.6%	10.6%	39.2%	35.1%	36.8%	10.0%	0.2%	15.8M	86.0M	-6.2M	1.06	50.95	10,525	11,134	97,207	95,712
2020-04-06	$302.99	$300.00	33.1%	8.9%	44.2%	31.1%	33.4%	5.3%	-2.5%	34.0M	-532.1M	-6.3M	0.54	39.91	28,916	15,589	90,657	91,128
2020-04-07	$305.69	$300.00	31.6%	8.7%	44.2%	28.6%	31.5%	8.3%	-1.2%	50.5M	-678.7M	-6.4M	0.32	59.80	35,786	11,279	96,469	93,610
2020-04-08	$306.03	$300.00	31.4%	9.0%	42.7%	28.4%	31.5%	8.8%	-0.4%	63.4M	-712.6M	-6.5M	0.40	45.34	25,272	10,012	105,387	95,952
2020-04-09	$300.29	$300.00	30.2%	8.6%	39.3%	26.5%	30.5%	5.9%	-0.6%	54.5M	-402.8M	-6.2M	0.57	43.92	33,261	18,978	113,870	97,972
2020-04-13	$300.06	$300.00	31.1%	8.8%	38.1%	27.8%	31.6%	5.9%	0.0%	30.6M	-332.4M	-6.2M	0.50	25.68	13,447	6,767	98,354	92,819
2020-04-14	$313.43	$300.00	28.4%	8.1%	40.7%	23.5%	29.4%	4.7%	-2.2%	76.0M	-1.04B	-6.2M	0.34	61.58	33,392	11,419	101,968	95,612
2020-04-15	$311.57	$300.00	31.9%	9.2%	38.8%	29.2%	32.5%	6.3%	-1.9%	67.8M	-886.9M	-6.5M	0.34	47.03	29,605	9,986	103,711	96,973
2020-04-16	$321.66	$300.00	31.7%	9.1%	40.1%	28.8%	32.5%	5.3%	-0.5%	112.6M	-1.54B	-6.5M	0.36	21.34	34,696	12,448	108,523	98,844
2020-04-17	$317.46	$300.00	29.6%	8.5%	39.5%	25.5%	29.7%	4.8%	-0.9%	64.0M	-1.23B	-6.5M	0.75	23.16	19,572	14,718	109,331	100,699
2020-04-20	$313.37	$300.00	30.7%	8.7%	33.6%	27.2%	30.7%	3.1%	3.6%	26.1M	-623.0M	-6.6M	0.76	35.46	11,018	8,363	81,963	80,611
2020-04-21	$302.94	$305.00	36.0%	10.0%	33.6%	35.6%	35.9%	9.4%	1.6%	5.2M	-240.0M	-6.8M	0.93	42.01	14,601	13,565	86,047	84,959
2020-04-22	$310.53	$305.00	32.4%	9.2%	34.3%	29.8%	32.9%	5.8%	4.2%	20.9M	-545.6M	-7.0M	0.61	22.39	9,085	5,577	90,470	89,383
2020-04-23	$307.01	$305.00	32.1%	9.2%	34.7%	29.5%	32.6%	4.5%	5.5%	13.2M	-399.5M	-6.8M	1.04	31.96	6,764	7,013	92,430	90,685
2020-04-24	$309.68	$305.00	29.6%	8.2%	34.7%	25.4%	29.3%	5.6%	4.7%	25.3M	-534.3M	-6.7M	0.68	14.48	10,781	7,310	93,595	93,460
2020-04-27	$309.29	$305.00	31.6%	7.5%	34.6%	28.7%	27.2%	4.3%	-1.4%	25.4M	-487.1M	-6.4M	0.80	12.89	13,182	10,521	85,888	84,069
2020-04-28	$306.88	$305.00	30.2%	7.6%	34.6%	26.5%	26.9%	-0.8%	-1.7%	17.4M	-378.2M	-6.4M	0.58	14.93	11,648	6,703	89,399	88,047
2020-04-29	$306.96	$305.00	30.9%	7.1%	34.3%	27.6%	25.1%	5.8%	-0.5%	14.1M	-377.5M	-6.4M	0.45	12.88	15,061	6,753	91,947	90,017
2020-04-30	$303.24	$305.00	32.4%	7.4%	34.5%	30.0%	27.8%	3.8%	0.2%	-1.3M	-201.9M	-6.4M	1.01	9.56	6,632	6,686	92,491	90,790