COST Options History — April 2017

In April 2017, COST traded between $166.83 and $177.41. ATM implied volatility averaged 14.5%, placing in the 14.7% IV rank vs the trailing year. The 30-day expected move averaged 3.9%. IV traded above realized volatility by 6.2% (HV 20d: 8.3%). Max pain ranged from $165.00 to $170.00. Net GEX was positive for 19 of 19 trading days. Term structure was in contango for 9 of 19 days. Put/call ratio averaged 1.11.

Notable Days

2017-04-06: Highest Volume — 33,619 contracts
2017-04-10: Largest IV spike — 5.3% change
2017-04-28: Highest IV Rank — 30.3%
2017-04-17: Largest Expected Move — 4.2%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$170.98	$166.83	$177.41	$166.83	$177.41
Max Pain	$165.66	$165.00	$170.00	$165.00	$170.00
ATM IV	14.5%	13.4%	16.4%	13.5%	16.4%
Expected Move	3.9%	3.5%	4.2%	3.8%	3.7%
HV 20d	8.3%	6.4%	11.1%	6.7%	11.1%
HV 60d	15.3%	14.9%	15.6%	15.2%	15.4%
IV Rank	14.7%	6.2%	30.3%	6.8%	30.3%
IV Percentile	16.6%	3.6%	42.5%	6.0%	42.5%
Term Structure	0.6%	-0.9%	3.0%	-0.0%	-0.9%
VWIV	14.4%	13.1%	17.1%	14.5%	13.7%
Skew 25d	2.3%	1.4%	2.7%	2.4%	2.5%
Skew 10d	4.6%	2.7%	6.7%	3.7%	5.0%
Call IV 25d	13.7%	12.6%	15.6%	12.8%	15.6%
Put IV 25d	16.0%	14.8%	18.2%	15.2%	18.2%
Bid-Ask Spread %	13.29	4.52	61.31	6.33	5.10
Gamma HHI	0.24	0.13	0.49	0.28	0.14
Net GEX	33.9M	10.4M	96.1M	31.1M	26.8M
Net DEX	-252.9M	-399.6M	-92.1M	-92.1M	-393.6M
Net VEX	-2.8M	-3.0M	-2.6M	-2.8M	-2.7M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.11	0.41	2.85	2.85	0.89
Total Volume	13,644	6,433	33,619	16,457	9,048
Total OI	154,593.526	117,639	177,978	163,915	138,225

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
2017-04-03	$166.83	$165.00	13.5%	3.8%	6.7%	6.8%	14.5%	2.4%	-0.0%	31.1M	-92.1M	-2.8M	2.85	6.33	4,272	12,185	73,294	90,621
2017-04-04	$167.12	$165.00	13.6%	3.8%	6.7%	7.6%	14.4%	2.3%	0.1%	32.1M	-98.5M	-2.8M	1.90	8.32	3,808	7,253	74,331	92,591
2017-04-05	$167.21	$165.00	14.1%	3.8%	6.4%	11.3%	14.0%	1.4%	-0.3%	30.6M	-105.1M	-2.8M	0.70	13.27	11,253	7,835	75,248	94,278
2017-04-06	$169.84	$165.00	13.6%	3.9%	8.3%	7.2%	14.1%	2.4%	-0.1%	78.8M	-323.5M	-2.7M	0.70	12.82	19,825	13,794	74,334	95,338
2017-04-07	$170.58	$165.00	13.4%	3.9%	8.2%	6.2%	14.4%	1.5%	0.4%	96.1M	-399.6M	-2.9M	0.71	6.36	10,070	7,105	79,832	98,146
2017-04-10	$170.80	$165.00	14.1%	4.1%	7.9%	12.0%	15.7%	2.5%	0.2%	47.1M	-334.9M	-2.9M	0.93	6.48	7,109	6,645	69,258	92,844
2017-04-11	$170.31	$165.00	14.3%	4.1%	8.1%	13.3%	14.0%	2.3%	0.0%	42.9M	-293.9M	-2.9M	0.79	6.47	5,026	3,977	68,827	95,532
2017-04-12	$169.71	$165.00	14.6%	4.1%	8.1%	15.4%	14.9%	2.5%	-0.1%	49.1M	-256.4M	-2.9M	1.06	7.07	3,269	3,453	70,288	96,134
2017-04-13	$169.20	$165.00	14.2%	4.0%	8.2%	12.4%	14.9%	2.5%	-0.2%	13.3M	-191.2M	-3.0M	1.19	6.76	3,883	4,611	70,437	97,455
2017-04-17	$168.83	$165.00	14.6%	4.2%	7.9%	15.8%	17.1%	2.7%	2.8%	10.4M	-119.5M	-2.9M	1.24	7.80	2,866	3,567	62,089	94,341
2017-04-18	$169.99	$165.00	14.1%	4.0%	8.1%	11.3%	15.2%	2.5%	3.0%	16.4M	-199.2M	-2.8M	0.93	5.48	3,818	3,558	62,151	94,481
2017-04-19	$169.88	$165.00	14.0%	4.0%	8.0%	11.0%	14.3%	2.5%	2.3%	19.0M	-207.5M	-2.8M	0.57	12.16	6,191	3,514	62,589	94,310
2017-04-20	$170.79	$165.00	14.2%	3.9%	8.0%	12.3%	14.2%	2.5%	2.8%	37.2M	-282.6M	-2.8M	1.25	6.56	4,237	5,278	64,162	94,582
2017-04-21	$170.97	$165.00	14.9%	4.0%	7.6%	18.2%	14.3%	2.4%	2.5%	33.4M	-295.0M	-2.7M	0.75	9.26	7,310	5,488	64,304	96,513
2017-04-24	$172.44	$165.00	15.6%	3.5%	7.8%	23.4%	13.1%	2.1%	-0.3%	19.5M	-212.4M	-2.7M	0.82	6.26	6,507	5,345	48,698	68,941
2017-04-25	$172.65	$165.00	15.1%	3.6%	7.8%	19.7%	14.3%	1.8%	-0.1%	22.1M	-227.8M	-2.7M	2.43	4.52	4,035	9,817	49,457	70,961
2017-04-26	$176.81	$167.50	15.2%	3.6%	11.0%	20.4%	13.4%	2.3%	-0.3%	18.7M	-389.2M	-2.6M	0.41	60.14	22,928	9,412	50,112	77,324
2017-04-27	$177.33	$170.00	15.8%	3.7%	11.0%	25.1%	13.5%	1.9%	-0.2%	19.0M	-383.5M	-2.7M	0.91	61.31	5,718	5,226	55,004	80,245
2017-04-28	$177.41	$170.00	16.4%	3.7%	11.1%	30.3%	13.7%	2.5%	-0.9%	26.8M	-393.6M	-2.7M	0.89	5.10	4,783	4,265	56,504	81,721