COST Options History — April 2015

In April 2015, COST traded between $142.99 and $152.60. ATM implied volatility averaged 15.4%, placing in the 26.6% IV rank vs the trailing year. The 30-day expected move averaged 4.4%. IV traded above realized volatility by 1.3% (HV 20d: 14.2%). Max pain ranged from $140.00 to $150.00. Net GEX was positive for 16 of 21 trading days. Term structure was in contango for 14 of 21 days. Put/call ratio averaged 0.96.

Notable Days

2015-04-17: Highest Volume — 24,288 contracts
2015-04-27: Largest IV spike — 8.0% change
2015-04-30: Highest IV Rank — 41.5%
2015-04-30: Largest Expected Move — 4.9%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$148.24	$142.99	$152.60	$150.05	$142.99
Max Pain	$148.00	$140.00	$150.00	$140.00	$147.00
ATM IV	15.4%	14.3%	18.1%	15.8%	18.1%
Expected Move	4.4%	4.1%	4.9%	4.6%	4.9%
HV 20d	14.2%	11.6%	16.7%	16.7%	14.7%
HV 60d	19.3%	16.4%	19.8%	19.6%	16.4%
IV Rank	26.6%	20.4%	41.5%	28.4%	41.5%
IV Percentile	61.4%	40.5%	91.3%	71.8%	91.3%
Term Structure	0.5%	-1.3%	2.2%	0.7%	-0.4%
VWIV	15.6%	14.6%	16.8%	16.6%	16.8%
Skew 25d	1.9%	1.1%	2.5%	2.3%	2.1%
Skew 10d	4.2%	3.2%	5.4%	4.6%	4.2%
Call IV 25d	15.1%	14.0%	17.7%	15.3%	17.7%
Put IV 25d	17.0%	15.5%	19.7%	17.6%	19.7%
Bid-Ask Spread %	12.01	8.72	16.13	9.91	9.15
Gamma HHI	0.15	0.10	0.35	0.15	0.12
Net GEX	4.1M	-20.0M	20.9M	12.5M	-17.2M
Net DEX	-206.1M	-391.9M	93.4M	-316.1M	93.4M
Net VEX	-2.0M	-2.3M	-1.8M	-1.9M	-2.3M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.96	0.41	1.73	1.14	0.77
Total Volume	12,819.286	5,490	24,288	8,744	12,319
Total OI	119,342.286	102,315	129,662	114,580	128,167

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
2015-04-01	$150.05	$140.00	15.8%	4.6%	16.7%	28.4%	16.6%	2.3%	0.7%	12.5M	-316.1M	-1.9M	1.14	9.91	4,078	4,666	55,516	59,064
2015-04-02	$151.81	$150.00	15.1%	4.7%	14.0%	24.7%	16.8%	1.8%	0.9%	14.7M	-380.3M	-1.8M	1.37	10.48	3,054	4,190	55,509	59,875
2015-04-06	$152.60	$150.00	15.4%	4.4%	13.4%	26.5%	15.8%	1.6%	-0.2%	17.9M	-391.9M	-1.9M	0.66	12.77	5,532	3,627	53,535	58,509
2015-04-07	$151.87	$150.00	15.1%	4.6%	13.3%	24.9%	15.4%	1.5%	1.1%	19.3M	-380.4M	-1.9M	1.01	11.72	3,924	3,974	56,343	59,099
2015-04-08	$152.00	$150.00	15.0%	4.5%	11.6%	24.4%	15.0%	1.9%	0.7%	20.9M	-384.4M	-1.8M	0.41	12.95	3,884	1,606	58,001	59,968
2015-04-09	$148.83	$150.00	15.6%	4.4%	14.0%	27.3%	15.7%	2.3%	-0.4%	4.6M	-257.8M	-1.8M	1.00	8.72	9,351	9,395	59,471	60,467
2015-04-10	$149.52	$150.00	14.7%	4.2%	13.2%	22.4%	15.5%	2.2%	-0.2%	3.1M	-294.4M	-1.9M	1.23	10.92	9,719	11,971	60,640	63,821
2015-04-13	$149.03	$150.00	15.0%	4.3%	13.2%	23.9%	15.7%	2.5%	-0.2%	2.7M	-261.7M	-1.9M	1.46	11.74	3,839	5,616	58,945	63,735
2015-04-14	$149.37	$150.00	14.8%	4.2%	13.1%	22.9%	14.7%	1.8%	0.3%	3.4M	-271.4M	-2.0M	0.56	12.09	9,307	5,174	59,987	65,464
2015-04-15	$149.11	$150.00	14.4%	4.1%	13.1%	20.8%	14.6%	2.1%	-0.0%	438.2K	-252.1M	-1.8M	0.64	10.95	7,026	4,514	58,256	66,470
2015-04-16	$147.19	$150.00	15.5%	4.5%	13.6%	26.9%	15.5%	2.2%	-1.3%	-6.9M	-163.7M	-1.8M	1.01	9.49	6,527	6,571	60,305	67,341
2015-04-17	$144.64	$150.00	15.8%	4.6%	14.7%	28.8%	16.6%	1.9%	0.2%	-20.0M	-41.9M	-1.9M	0.98	11.28	12,242	12,046	61,007	68,655
2015-04-20	$146.39	$145.00	15.0%	4.3%	15.1%	24.0%	15.5%	1.1%	1.3%	-1.4M	-113.0M	-1.9M	0.54	16.13	10,958	5,955	52,100	50,215
2015-04-21	$147.29	$145.00	14.8%	4.3%	15.3%	23.2%	15.3%	1.8%	1.5%	7.1M	-169.2M	-2.0M	0.60	15.33	6,285	3,765	57,018	52,237
2015-04-22	$147.03	$146.00	14.3%	4.3%	15.3%	20.4%	15.3%	1.6%	2.2%	6.6M	-150.6M	-2.0M	0.73	13.25	6,456	4,730	58,274	53,007
2015-04-23	$147.41	$147.00	14.8%	4.4%	14.7%	23.1%	15.3%	1.8%	1.6%	10.3M	-175.7M	-2.0M	1.73	12.21	7,370	12,753	59,935	54,653
2015-04-24	$148.10	$147.00	14.9%	4.2%	14.8%	23.7%	15.1%	1.3%	1.7%	16.5M	-188.7M	-2.2M	0.95	11.51	5,190	4,955	62,075	63,391
2015-04-27	$146.93	$147.00	16.1%	4.4%	15.0%	30.3%	16.0%	2.0%	0.1%	2.9M	-123.6M	-2.2M	1.22	12.20	3,822	4,646	58,914	61,030
2015-04-28	$146.54	$147.00	16.4%	4.4%	14.0%	31.7%	16.3%	2.0%	0.5%	23.0K	-104.2M	-2.2M	0.57	13.61	8,448	4,795	60,161	62,135
2015-04-29	$144.42	$147.00	17.6%	4.8%	14.7%	38.4%	15.2%	2.1%	0.0%	-10.7M	-917.1K	-2.3M	1.48	15.87	6,007	8,918	59,608	63,285
2015-04-30	$142.99	$147.00	18.1%	4.9%	14.7%	41.5%	16.8%	2.1%	-0.4%	-17.2M	93.4M	-2.3M	0.77	9.15	6,966	5,353	60,622	67,545