COST Options History — July 2019

In July 2019, COST traded between $263.18 and $282.63. ATM implied volatility averaged 15.0%, placing in the 6.1% IV rank vs the trailing year. The 30-day expected move averaged 4.4%. IV traded above realized volatility by 3.6% (HV 20d: 11.3%). Max pain ranged from $250.00 to $275.00. Net GEX was positive for 22 of 22 trading days. Term structure was in contango for 13 of 22 days. Put/call ratio averaged 0.75.

Notable Days

2019-07-11: Highest Volume — 41,416 contracts
2019-07-22: Largest IV spike — 7.8% change
2019-07-31: Highest IV Rank — 17.6%
2019-07-31: Largest Expected Move — 5.2%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$276.21	$263.18	$282.63	$263.18	$276.13
Max Pain	$268.18	$250.00	$275.00	$250.00	$275.00
ATM IV	15.0%	13.7%	16.9%	14.6%	16.9%
Expected Move	4.4%	4.0%	5.2%	4.3%	5.2%
HV 20d	11.3%	9.9%	12.9%	12.9%	11.8%
HV 60d	14.8%	14.0%	15.6%	15.3%	14.3%
IV Rank	6.1%	0.0%	17.6%	1.5%	17.6%
IV Percentile	9.8%	0.0%	34.5%	1.2%	34.5%
Term Structure	0.1%	-0.6%	0.7%	0.5%	-0.1%
VWIV	15.6%	14.5%	17.9%	14.6%	17.9%
Skew 25d	2.3%	1.6%	2.6%	2.4%	2.5%
Skew 10d	5.2%	4.1%	6.3%	4.2%	6.2%
Call IV 25d	14.0%	12.7%	15.9%	13.6%	15.9%
Put IV 25d	16.3%	14.6%	18.4%	16.1%	18.4%
Bid-Ask Spread %	6.11	2.39	13.76	2.39	10.90
Gamma HHI	0.22	0.09	0.79	0.09	0.11
Net GEX	61.8M	5.7M	224.7M	5.7M	28.2M
Net DEX	-1.04B	-1.61B	-599.1M	-599.1M	-613.1M
Net VEX	-4.0M	-4.4M	-3.6M	-3.7M	-4.2M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.75	0.31	1.56	0.99	0.82
Total Volume	20,418.318	10,361	41,416	17,701	15,898
Total OI	158,735.773	136,226	187,527	136,226	154,593

Daily Data (22 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
2019-07-01	$263.18	$250.00	14.6%	4.3%	12.9%	1.5%	14.6%	2.4%	0.5%	5.7M	-599.1M	-3.7M	0.99	2.39	8,896	8,805	55,762	80,464
2019-07-02	$264.56	$250.00	14.5%	4.0%	11.7%	1.2%	14.6%	2.2%	0.3%	12.3M	-672.5M	-3.7M	1.56	2.47	5,871	9,155	58,660	84,274
2019-07-03	$268.59	$250.00	14.2%	4.0%	11.9%	0.0%	14.7%	2.1%	0.6%	36.1M	-879.8M	-3.7M	1.08	2.98	7,254	7,816	60,281	84,590
2019-07-05	$268.34	$265.00	14.7%	4.3%	11.5%	3.1%	15.7%	2.1%	0.2%	25.3M	-887.7M	-3.7M	0.97	4.40	8,675	8,407	61,482	85,818
2019-07-08	$269.56	$265.00	14.9%	4.4%	9.9%	3.9%	15.3%	2.4%	0.2%	30.4M	-884.8M	-3.6M	0.31	4.77	17,961	5,523	59,515	81,348
2019-07-09	$269.35	$265.00	15.1%	4.4%	10.0%	5.0%	15.6%	2.3%	0.2%	60.4M	-1.01B	-4.0M	0.72	13.76	7,953	5,757	72,843	83,138
2019-07-10	$271.13	$265.00	14.4%	4.2%	10.0%	1.4%	14.9%	1.9%	0.2%	67.0M	-1.13B	-4.0M	0.60	4.58	10,874	6,534	75,435	85,344
2019-07-11	$276.32	$265.00	13.7%	4.1%	11.5%	0.0%	15.0%	1.6%	0.7%	77.1M	-1.45B	-3.8M	0.75	3.48	23,716	17,700	77,757	87,810
2019-07-12	$279.76	$265.00	13.8%	4.0%	11.8%	0.5%	14.5%	2.1%	0.2%	95.7M	-1.61B	-3.8M	0.63	12.13	21,830	13,749	80,462	92,905
2019-07-15	$280.36	$270.00	14.5%	4.2%	11.7%	4.5%	15.6%	2.3%	-0.2%	54.8M	-1.42B	-3.9M	0.46	5.54	18,824	8,742	76,450	90,316
2019-07-16	$281.12	$270.00	14.4%	4.1%	11.7%	4.0%	15.0%	2.1%	0.0%	109.7M	-1.48B	-3.9M	0.69	4.62	15,529	10,774	87,166	95,451
2019-07-17	$282.04	$270.00	14.6%	4.2%	11.6%	5.0%	15.2%	2.1%	-0.3%	122.3M	-1.44B	-3.9M	0.65	5.67	13,411	8,711	84,728	98,701
2019-07-18	$282.48	$275.00	15.1%	4.3%	11.6%	7.6%	15.5%	2.5%	-0.6%	139.4M	-1.41B	-4.0M	0.57	13.30	18,648	10,588	85,880	101,405
2019-07-19	$282.63	$275.00	14.5%	4.1%	11.0%	4.6%	15.4%	2.3%	0.3%	224.7M	-1.42B	-4.0M	0.63	4.56	19,268	12,170	84,369	103,158
2019-07-22	$279.73	$275.00	15.7%	4.6%	12.0%	10.9%	15.9%	2.5%	-0.1%	19.4M	-808.4M	-4.1M	0.84	5.13	11,681	9,844	63,742	77,494
2019-07-23	$280.00	$275.00	15.7%	4.6%	11.7%	10.9%	16.0%	2.5%	-0.2%	31.3M	-850.0M	-4.3M	0.74	4.52	7,847	5,810	69,696	81,517
2019-07-24	$280.53	$275.00	15.8%	4.6%	11.5%	11.5%	17.0%	2.4%	-0.2%	37.4M	-898.9M	-4.2M	0.91	5.01	6,404	5,852	71,565	82,877
2019-07-25	$279.72	$275.00	16.0%	4.7%	11.3%	12.6%	16.8%	2.6%	-0.1%	39.6M	-833.9M	-4.4M	0.65	5.53	8,837	5,734	72,923	83,862
2019-07-26	$281.38	$275.00	14.9%	4.3%	11.3%	6.9%	15.4%	2.4%	-0.0%	51.1M	-971.3M	-4.2M	0.48	5.44	11,270	5,426	74,521	85,163
2019-07-29	$280.53	$275.00	15.6%	4.7%	10.5%	10.4%	16.6%	2.6%	0.1%	47.2M	-850.4M	-4.3M	0.75	5.75	6,340	4,758	68,758	78,686
2019-07-30	$279.26	$275.00	15.8%	4.9%	10.7%	11.8%	17.0%	2.6%	0.1%	45.4M	-792.4M	-4.2M	0.72	7.45	6,025	4,336	70,972	80,306
2019-07-31	$276.13	$275.00	16.9%	5.2%	11.8%	17.6%	17.9%	2.5%	-0.1%	28.2M	-613.1M	-4.2M	0.82	10.90	8,741	7,157	72,879	81,714