COST Options History — September 2018

In September 2018, COST traded between $231.93 and $244.38. ATM implied volatility averaged 20.7%, placing in the 34.9% IV rank vs the trailing year. The 30-day expected move averaged 5.8%. IV traded above realized volatility by 6.8% (HV 20d: 13.8%). Max pain ranged from $210.00 to $220.00. Net GEX was positive for 19 of 19 trading days. Term structure was in contango for 1 of 19 days. Put/call ratio averaged 1.12.

Notable Days

2018-09-07: Highest Volume — 44,239 contracts
2018-09-05: Largest IV spike — 8.7% change
2018-09-18: Highest IV Rank — 39.7%
2018-09-25: Largest Expected Move — 6.2%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$236.54	$231.93	$244.38	$234.60	$234.73
Max Pain	$219.47	$210.00	$220.00	$220.00	$220.00
ATM IV	20.7%	18.9%	21.5%	18.9%	20.2%
Expected Move	5.8%	4.4%	6.2%	4.4%	6.1%
HV 20d	13.8%	9.3%	15.9%	13.8%	15.9%
HV 60d	12.9%	11.5%	13.9%	11.5%	13.6%
IV Rank	34.9%	25.5%	39.7%	25.5%	32.2%
IV Percentile	71.4%	53.6%	81.7%	53.6%	64.7%
Term Structure	-0.7%	-1.6%	0.0%	-0.4%	-0.7%
VWIV	20.5%	15.7%	22.4%	15.7%	21.4%
Skew 25d	2.6%	1.8%	3.1%	1.8%	2.8%
Skew 10d	5.4%	4.2%	7.1%	4.2%	5.5%
Call IV 25d	19.7%	18.7%	20.7%	18.7%	19.3%
Put IV 25d	22.3%	20.5%	23.1%	20.5%	22.1%
Bid-Ask Spread %	7.21	3.15	12.82	5.03	4.63
Gamma HHI	0.15	0.10	0.26	0.13	0.19
Net GEX	38.9M	16.4M	66.6M	54.9M	43.8M
Net DEX	-1.03B	-1.50B	-731.5M	-1.10B	-839.2M
Net VEX	-2.9M	-3.1M	-2.7M	-2.9M	-3.0M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.12	0.45	1.79	0.81	0.79
Total Volume	19,309.368	12,105	44,239	18,578	12,256
Total OI	189,194.211	172,160	206,978	175,731	189,504

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
2018-09-04	$234.60	$220.00	18.9%	4.4%	13.8%	25.5%	15.7%	1.8%	-0.4%	54.9M	-1.10B	-2.9M	0.81	5.03	10,283	8,295	80,040	95,691
2018-09-05	$235.48	$220.00	20.6%	4.7%	13.8%	34.5%	17.1%	2.4%	-0.7%	61.3M	-1.13B	-3.0M	1.12	9.88	8,937	9,992	82,950	97,144
2018-09-06	$236.60	$210.00	20.4%	5.5%	13.8%	33.3%	20.3%	2.8%	-0.5%	66.6M	-1.20B	-2.9M	1.79	8.66	9,081	16,295	84,733	99,443
2018-09-07	$241.48	$220.00	21.0%	5.8%	9.7%	37.0%	20.4%	2.3%	-0.6%	52.0M	-1.50B	-2.7M	0.92	5.89	23,051	21,188	86,965	106,075
2018-09-10	$243.33	$220.00	21.1%	5.8%	9.7%	37.1%	20.7%	2.2%	-0.6%	62.7M	-1.41B	-2.7M	0.79	5.32	10,555	8,320	83,021	99,225
2018-09-11	$244.38	$220.00	21.5%	6.0%	9.3%	39.7%	21.1%	2.4%	-0.3%	65.2M	-1.46B	-2.7M	0.81	6.71	8,573	6,976	85,447	101,089
2018-09-12	$242.95	$220.00	20.9%	5.8%	9.9%	36.0%	20.5%	2.3%	-0.5%	66.2M	-1.38B	-2.7M	1.23	7.66	7,648	9,403	87,540	102,541
2018-09-13	$241.25	$220.00	20.5%	5.6%	10.6%	34.3%	19.9%	2.0%	-1.0%	64.2M	-1.26B	-2.7M	1.20	10.00	7,198	8,605	89,258	105,061
2018-09-14	$235.61	$220.00	20.7%	5.7%	14.5%	35.1%	20.2%	2.4%	-1.6%	17.6M	-929.4M	-2.9M	1.18	8.88	18,396	21,662	90,499	105,679
2018-09-17	$231.93	$220.00	21.5%	6.1%	15.5%	39.5%	21.2%	2.5%	-0.8%	18.7M	-739.9M	-3.0M	1.37	7.51	9,050	12,394	89,782	104,393
2018-09-18	$234.62	$220.00	21.5%	6.2%	15.7%	39.7%	21.2%	2.7%	-1.4%	32.3M	-909.6M	-3.0M	0.91	10.29	9,464	8,628	91,834	107,098
2018-09-19	$233.41	$220.00	21.3%	6.1%	15.8%	38.3%	22.4%	2.9%	-0.9%	18.9M	-809.8M	-3.1M	1.79	12.82	5,496	9,860	93,550	109,449
2018-09-20	$233.86	$220.00	20.6%	6.0%	15.8%	34.5%	20.7%	2.8%	-1.4%	17.3M	-857.5M	-2.9M	1.15	10.25	6,282	7,203	94,457	111,429
2018-09-21	$235.24	$220.00	19.7%	5.6%	15.9%	29.5%	20.4%	3.0%	0.0%	21.6M	-953.1M	-3.0M	0.92	7.29	7,830	7,202	95,105	111,873
2018-09-24	$233.31	$220.00	20.8%	6.1%	15.9%	35.4%	21.9%	3.1%	-0.6%	20.6M	-746.6M	-3.0M	1.52	3.15	4,988	7,585	76,598	95,562
2018-09-25	$233.15	$220.00	20.8%	6.2%	15.6%	35.8%	21.8%	3.1%	-0.6%	16.4M	-731.5M	-3.0M	1.45	3.89	4,949	7,156	77,647	99,042
2018-09-26	$234.61	$220.00	20.1%	6.0%	15.8%	31.9%	20.1%	2.9%	-0.7%	20.9M	-817.7M	-3.0M	0.45	4.60	13,111	5,918	78,718	100,043
2018-09-27	$233.63	$220.00	20.4%	6.1%	15.9%	33.4%	22.2%	2.9%	-0.7%	18.2M	-779.0M	-3.0M	1.04	4.56	6,400	6,648	84,702	101,503
2018-09-28	$234.73	$220.00	20.2%	6.1%	15.9%	32.2%	21.4%	2.8%	-0.7%	43.8M	-839.2M	-3.0M	0.79	4.63	6,831	5,425	86,135	103,369