COST Options History — August 2018

In August 2018, COST traded between $217.57 and $232.59. ATM implied volatility averaged 15.3%, placing in the 4.9% IV rank vs the trailing year. The 30-day expected move averaged 4.4%. IV traded above realized volatility by 1.5% (HV 20d: 13.8%). Max pain ranged from $200.00 to $220.00. Net GEX was positive for 23 of 23 trading days. Term structure was in contango for 18 of 23 days. Put/call ratio averaged 0.92.

Notable Days

2018-08-29: Highest Volume — 40,231 contracts
2018-08-30: Largest IV spike — 8.7% change
2018-08-15: Highest IV Rank — 10.4%
2018-08-01: Largest Expected Move — 4.9%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$225.37	$217.57	$232.59	$217.57	$232.59
Max Pain	$208.26	$200.00	$220.00	$210.00	$220.00
ATM IV	15.3%	14.3%	16.4%	16.3%	15.7%
Expected Move	4.4%	4.1%	4.9%	4.9%	4.1%
HV 20d	13.8%	10.7%	15.3%	10.7%	13.6%
HV 60d	12.6%	11.4%	13.4%	11.8%	11.4%
IV Rank	4.9%	0.0%	10.4%	10.3%	7.8%
IV Percentile	6.8%	0.0%	19.0%	15.5%	14.7%
Term Structure	0.9%	-0.6%	4.0%	0.2%	4.0%
VWIV	15.8%	13.8%	17.4%	17.4%	13.8%
Skew 25d	2.2%	1.8%	2.7%	2.3%	1.8%
Skew 10d	4.5%	3.6%	6.3%	4.5%	3.6%
Call IV 25d	14.5%	13.6%	15.5%	15.5%	13.6%
Put IV 25d	16.7%	15.5%	18.2%	17.8%	15.5%
Bid-Ask Spread %	7.41	4.50	17.15	14.22	5.45
Gamma HHI	0.22	0.16	0.43	0.16	0.43
Net GEX	48.9M	19.8M	116.3M	20.7M	116.3M
Net DEX	-938.5M	-1.17B	-636.1M	-640.5M	-1.03B
Net VEX	-3.0M	-3.4M	-2.7M	-3.3M	-3.0M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.92	0.43	1.35	1.14	0.48
Total Volume	18,206.652	10,676	40,231	21,056	23,096
Total OI	174,571	162,003	189,305	162,003	179,714

Daily Data (23 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
2018-08-01	$217.57	$210.00	16.3%	4.9%	10.7%	10.3%	17.4%	2.3%	0.2%	20.7M	-640.5M	-3.3M	1.14	14.22	9,832	11,224	71,345	90,658
2018-08-02	$221.06	$210.00	16.2%	4.8%	11.5%	9.4%	16.8%	2.5%	0.3%	53.3M	-875.3M	-3.1M	0.97	17.15	9,168	8,884	75,375	95,217
2018-08-03	$222.18	$210.00	15.5%	4.5%	11.6%	5.8%	16.2%	2.5%	0.3%	90.5M	-946.5M	-3.2M	0.83	10.19	8,233	6,813	79,068	97,654
2018-08-06	$222.70	$200.00	15.4%	4.6%	11.5%	5.0%	15.4%	2.0%	0.1%	38.0M	-888.4M	-3.1M	0.89	5.92	7,830	6,962	74,437	91,797
2018-08-07	$223.88	$200.00	15.0%	4.6%	11.5%	2.9%	16.1%	2.1%	-0.1%	41.3M	-965.9M	-3.0M	1.05	6.14	5,272	5,539	75,774	93,257
2018-08-08	$224.78	$200.00	14.9%	4.5%	11.4%	2.5%	16.0%	1.9%	-0.0%	43.8M	-1.02B	-2.9M	1.18	4.88	5,195	6,110	76,196	94,062
2018-08-09	$218.62	$200.00	15.8%	4.4%	15.3%	7.1%	15.9%	2.0%	0.1%	19.8M	-636.1M	-3.1M	0.80	6.94	19,081	15,216	77,843	95,903
2018-08-10	$220.38	$200.00	16.1%	4.6%	15.2%	9.1%	17.2%	2.5%	-0.1%	35.6M	-788.1M	-3.3M	0.80	7.27	12,163	9,712	85,337	100,671
2018-08-13	$219.78	$200.00	16.1%	4.5%	14.8%	8.8%	16.7%	2.3%	-0.3%	33.2M	-721.6M	-3.4M	1.14	7.94	5,601	6,386	82,672	98,648
2018-08-14	$222.12	$210.00	15.3%	4.5%	15.1%	4.6%	16.1%	2.3%	0.5%	40.4M	-885.8M	-3.2M	1.06	5.84	5,170	5,506	83,120	100,349
2018-08-15	$222.06	$210.00	16.4%	4.8%	15.0%	10.4%	17.0%	2.7%	0.4%	39.7M	-858.1M	-3.3M	1.30	11.61	6,096	7,945	83,940	100,511
2018-08-16	$223.04	$210.00	15.6%	4.6%	14.4%	6.3%	16.3%	2.5%	0.5%	43.0M	-964.8M	-3.1M	1.16	4.50	6,351	7,393	85,631	103,333
2018-08-17	$225.47	$210.00	14.9%	4.2%	14.8%	2.3%	15.5%	2.5%	-0.6%	40.3M	-1.14B	-3.0M	1.15	5.55	8,660	9,958	85,480	103,825
2018-08-20	$227.47	$210.00	14.8%	4.3%	15.0%	1.9%	15.3%	2.4%	0.0%	39.5M	-978.3M	-2.9M	0.67	5.03	9,555	6,447	72,339	89,681
2018-08-21	$228.79	$210.00	14.4%	4.1%	15.0%	0.0%	14.8%	2.4%	0.2%	47.2M	-1.05B	-2.9M	0.43	5.09	16,231	7,019	74,990	90,928
2018-08-22	$229.22	$210.00	14.8%	4.2%	14.7%	2.4%	15.5%	2.4%	0.1%	50.9M	-1.06B	-2.8M	0.87	6.01	7,705	6,717	78,171	92,486
2018-08-23	$229.34	$210.00	14.9%	4.3%	14.7%	3.0%	15.6%	2.4%	0.0%	54.8M	-1.06B	-2.8M	1.35	5.93	6,763	9,155	79,847	93,966
2018-08-24	$231.56	$210.00	14.4%	4.1%	14.3%	0.1%	15.1%	2.1%	0.1%	78.9M	-1.17B	-2.7M	0.61	6.99	10,379	6,343	81,758	96,375
2018-08-27	$229.77	$210.00	15.2%	4.4%	14.6%	4.7%	15.8%	2.0%	3.4%	43.6M	-975.8M	-2.8M	0.70	7.71	12,586	8,750	74,809	89,147
2018-08-28	$230.34	$210.00	14.8%	4.2%	14.6%	2.3%	15.4%	2.0%	3.8%	50.7M	-1.01B	-2.8M	0.83	6.45	8,065	6,657	77,065	91,581
2018-08-29	$230.30	$210.00	14.3%	4.1%	14.3%	0.0%	14.9%	1.8%	3.9%	50.9M	-1.01B	-2.8M	0.78	7.15	22,575	17,656	79,205	92,975
2018-08-30	$230.42	$220.00	15.6%	4.2%	13.4%	6.8%	15.1%	1.8%	3.9%	51.5M	-918.7M	-3.0M	0.95	6.39	8,577	8,177	78,576	99,417
2018-08-31	$232.59	$220.00	15.7%	4.1%	13.6%	7.8%	13.8%	1.8%	4.0%	116.3M	-1.03B	-3.0M	0.48	5.45	15,566	7,530	79,013	100,701