COST Options History — October 2019

In October 2019, COST traded between $284.08 and $303.22. ATM implied volatility averaged 19.6%, placing in the 32.4% IV rank vs the trailing year. The 30-day expected move averaged 5.7%. IV traded above realized volatility by 6.2% (HV 20d: 13.4%). Max pain ranged from $275.00 to $295.00. Net GEX was positive for 23 of 23 trading days. Term structure was in contango for 12 of 23 days. Put/call ratio averaged 0.66.

Notable Days

2019-10-04: Highest Volume — 125,742 contracts
2019-10-04: Largest IV drop — 32.1% change
2019-10-02: Highest IV Rank — 87.0%
2019-10-02: Largest Expected Move — 9.8%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$296.18	$284.08	$303.22	$284.08	$295.23
Max Pain	$289.35	$275.00	$295.00	$275.00	$295.00
ATM IV	19.6%	15.9%	29.5%	28.4%	16.8%
Expected Move	5.7%	4.7%	9.8%	9.3%	5.0%
HV 20d	13.4%	11.4%	17.1%	16.7%	12.4%
HV 60d	20.0%	19.1%	20.3%	20.1%	19.1%
IV Rank	32.4%	11.9%	87.0%	81.2%	17.3%
IV Percentile	41.1%	17.9%	98.8%	97.6%	26.2%
Term Structure	-0.0%	-0.9%	0.7%	-0.8%	0.7%
VWIV	20.4%	16.8%	34.3%	32.0%	17.5%
Skew 25d	2.9%	2.2%	4.2%	4.1%	2.3%
Skew 10d	5.8%	3.8%	9.2%	8.5%	4.8%
Call IV 25d	18.4%	15.0%	27.6%	26.6%	15.8%
Put IV 25d	21.3%	17.4%	31.8%	30.7%	18.1%
Bid-Ask Spread %	6.01	2.79	15.71	4.48	3.73
Gamma HHI	0.14	0.06	0.29	0.06	0.10
Net GEX	50.8M	6.0M	117.6M	12.6M	12.8M
Net DEX	-982.6M	-1.57B	-531.7M	-531.7M	-628.5M
Net VEX	-4.8M	-5.5M	-4.5M	-5.4M	-4.7M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.66	0.43	0.91	0.49	0.86
Total Volume	32,282.87	15,000	125,742	32,128	20,209
Total OI	198,368.957	155,968	258,828	202,715	171,357

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
2019-10-01	$284.08	$275.00	28.4%	9.3%	16.7%	81.2%	32.0%	4.1%	-0.8%	12.6M	-531.7M	-5.4M	0.49	4.48	21,579	10,549	99,686	103,029
2019-10-02	$285.21	$275.00	29.5%	9.8%	16.1%	87.0%	34.3%	4.2%	-0.9%	19.3M	-616.4M	-5.5M	0.57	5.30	16,165	9,151	104,907	106,216
2019-10-03	$289.68	$285.00	28.9%	7.8%	17.1%	83.8%	27.9%	4.0%	-0.5%	34.9M	-889.7M	-5.4M	0.63	15.71	57,848	36,617	108,661	109,523
2019-10-04	$291.28	$285.00	19.6%	5.8%	15.1%	32.6%	20.5%	2.5%	0.1%	72.7M	-1.09B	-4.9M	0.83	6.94	68,701	57,041	129,786	129,042
2019-10-07	$293.35	$290.00	20.4%	5.8%	14.7%	37.0%	20.9%	2.6%	-0.4%	56.1M	-1.06B	-5.0M	0.60	6.25	30,326	18,058	106,525	104,203
2019-10-08	$292.43	$290.00	22.0%	6.3%	14.0%	45.7%	21.9%	2.8%	-0.2%	49.6M	-986.1M	-5.1M	0.59	7.54	19,027	11,218	109,479	108,940
2019-10-09	$296.72	$285.00	20.6%	6.0%	13.4%	37.9%	21.0%	3.0%	0.3%	76.1M	-1.29B	-5.0M	0.69	15.62	24,196	16,664	112,407	112,054
2019-10-10	$296.92	$290.00	20.8%	6.0%	13.4%	39.3%	21.4%	2.5%	0.1%	73.9M	-1.26B	-5.1M	0.72	6.80	15,476	11,170	113,294	115,677
2019-10-11	$299.12	$290.00	18.8%	5.5%	13.5%	27.9%	19.8%	2.2%	0.3%	117.6M	-1.41B	-4.9M	0.59	8.79	18,455	10,952	115,020	117,252
2019-10-14	$297.62	$290.00	18.6%	5.4%	13.1%	27.2%	19.4%	3.0%	0.2%	56.9M	-1.15B	-4.8M	0.79	3.47	8,496	6,704	98,305	104,139
2019-10-15	$298.74	$290.00	17.8%	5.1%	12.9%	22.6%	18.5%	3.4%	0.2%	67.3M	-1.22B	-4.7M	0.65	3.68	9,951	6,463	99,388	105,958
2019-10-16	$298.39	$290.00	17.8%	5.1%	12.9%	22.3%	18.5%	3.1%	0.2%	66.7M	-1.20B	-4.7M	0.72	5.23	12,754	9,216	100,699	106,612
2019-10-17	$302.46	$290.00	17.4%	5.0%	12.0%	20.5%	18.0%	3.2%	-0.0%	105.7M	-1.49B	-4.6M	0.48	6.48	24,721	11,934	102,920	109,212
2019-10-18	$303.22	$290.00	16.9%	4.8%	11.9%	17.5%	18.1%	3.4%	0.4%	103.3M	-1.57B	-4.5M	0.54	4.97	18,414	9,869	105,523	110,550
2019-10-21	$301.29	$290.00	17.3%	4.9%	12.3%	19.8%	17.9%	2.8%	-0.4%	41.7M	-875.7M	-4.5M	0.88	4.84	8,920	7,851	71,472	84,496
2019-10-22	$300.13	$290.00	17.7%	5.1%	12.4%	21.9%	17.8%	2.8%	-0.7%	34.6M	-820.5M	-4.6M	0.62	7.97	13,014	8,036	73,821	87,306
2019-10-23	$297.99	$290.00	17.4%	5.0%	12.8%	20.7%	17.4%	2.8%	-0.5%	7.4M	-686.1M	-4.6M	0.47	3.65	16,499	7,817	75,717	89,804
2019-10-24	$297.54	$295.00	17.5%	5.0%	12.8%	20.7%	18.1%	2.6%	-0.5%	17.1M	-733.3M	-4.8M	0.80	3.50	9,716	7,730	83,059	90,923
2019-10-25	$296.51	$295.00	16.6%	4.7%	12.5%	16.2%	16.8%	2.5%	-0.4%	6.0M	-706.7M	-4.5M	0.91	3.37	10,348	9,366	84,754	93,253
2019-10-28	$298.37	$295.00	16.7%	4.9%	12.4%	16.3%	17.4%	2.6%	0.6%	41.0M	-801.7M	-4.6M	0.63	3.51	9,599	6,044	77,848	87,242
2019-10-29	$296.09	$295.00	16.7%	4.9%	11.4%	16.7%	17.4%	2.4%	0.5%	31.1M	-694.3M	-4.7M	0.63	2.79	9,215	5,785	81,642	89,240
2019-10-30	$299.72	$295.00	15.9%	4.7%	11.9%	11.9%	17.2%	2.4%	0.7%	63.7M	-910.6M	-4.7M	0.43	3.66	14,448	6,194	81,016	90,529
2019-10-31	$295.23	$295.00	16.8%	5.0%	12.4%	17.3%	17.5%	2.3%	0.7%	12.8M	-628.5M	-4.7M	0.86	3.73	10,884	9,325	80,486	90,871