COST Options History — January 2018

In January 2018, COST traded between $185.53 and $198.90. ATM implied volatility averaged 17.7%, placing in the 48.8% IV rank vs the trailing year. The 30-day expected move averaged 5.2%. IV traded above realized volatility by 2.3% (HV 20d: 15.4%). Max pain ranged from $173.00 to $190.00. Net GEX was positive for 20 of 21 trading days. Term structure was in contango for 13 of 21 days. Put/call ratio averaged 0.96.

Notable Days

2018-01-11: Highest Volume — 42,696 contracts
2018-01-29: Largest IV spike — 10.5% change
2018-01-30: Highest IV Rank — 62.7%
2018-01-30: Largest Expected Move — 6.0%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$192.13	$185.53	$198.90	$188.38	$194.80
Max Pain	$184.57	$173.00	$190.00	$173.00	$190.00
ATM IV	17.7%	16.6%	19.4%	17.4%	18.7%
Expected Move	5.2%	4.9%	6.0%	5.0%	5.7%
HV 20d	15.4%	12.6%	18.5%	18.0%	15.7%
HV 60d	17.2%	16.7%	21.4%	21.4%	17.3%
IV Rank	48.8%	39.5%	62.7%	46.2%	57.1%
IV Percentile	61.8%	42.1%	79.8%	60.3%	71.4%
Term Structure	0.5%	-1.5%	4.8%	0.5%	4.2%
VWIV	18.8%	17.5%	21.9%	17.7%	20.9%
Skew 25d	1.8%	1.0%	2.4%	1.7%	1.9%
Skew 10d	3.5%	1.6%	4.7%	3.7%	2.9%
Call IV 25d	17.1%	16.2%	18.9%	16.9%	18.1%
Put IV 25d	18.9%	17.7%	20.4%	18.5%	20.0%
Bid-Ask Spread %	10.33	3.81	20.45	7.71	14.95
Gamma HHI	0.12	0.08	0.24	0.08	0.13
Net GEX	19.9M	-4.1M	31.5M	19.6M	14.5M
Net DEX	-832.6M	-1.14B	-530.9M	-869.6M	-571.6M
Net VEX	-4.4M	-4.7M	-4.2M	-4.3M	-4.7M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.96	0.49	1.42	1.00	0.49
Total Volume	23,559.762	13,567	42,696	22,976	19,662
Total OI	246,713.143	160,135	302,682	266,690	186,594

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
2018-01-02	$188.38	$173.00	17.4%	5.0%	18.0%	46.2%	17.7%	1.7%	0.5%	19.6M	-869.6M	-4.3M	1.00	7.71	11,494	11,482	111,265	155,425
2018-01-03	$190.65	$173.00	17.1%	5.0%	16.2%	43.8%	17.5%	2.2%	0.3%	31.2M	-1.03B	-4.2M	1.32	3.81	12,987	17,155	114,363	158,266
2018-01-04	$189.13	$185.00	16.6%	4.9%	16.1%	39.5%	18.1%	1.6%	0.6%	21.5M	-876.1M	-4.3M	0.93	6.20	15,915	14,847	117,876	163,640
2018-01-05	$187.67	$185.00	16.9%	4.9%	16.3%	42.1%	18.1%	1.4%	0.7%	15.0M	-785.6M	-4.4M	1.42	4.87	11,307	16,035	122,231	167,745
2018-01-08	$188.55	$185.00	17.6%	5.0%	16.2%	48.0%	18.0%	1.9%	-0.7%	13.5M	-832.2M	-4.3M	1.15	5.79	8,233	9,459	116,996	166,278
2018-01-09	$186.20	$185.00	17.5%	5.1%	16.6%	47.2%	17.9%	1.5%	0.2%	3.2M	-629.7M	-4.5M	1.12	5.36	9,440	10,577	118,487	168,369
2018-01-10	$185.53	$185.00	17.6%	5.1%	16.5%	47.8%	18.0%	1.3%	0.1%	-4.1M	-543.5M	-4.5M	1.38	10.50	8,633	11,933	120,674	170,440
2018-01-11	$189.28	$185.00	18.0%	5.1%	18.1%	51.3%	18.3%	1.4%	-0.3%	18.0M	-904.7M	-4.5M	0.55	15.75	27,554	15,142	121,803	172,680
2018-01-12	$191.59	$185.00	17.7%	5.1%	18.5%	48.3%	18.3%	1.5%	0.4%	25.2M	-1.14B	-4.5M	0.79	9.43	15,326	12,090	127,206	175,476
2018-01-16	$191.61	$185.00	19.0%	5.5%	18.3%	59.4%	19.2%	2.2%	-1.5%	28.4M	-1.07B	-4.4M	1.05	11.01	10,359	10,916	122,036	170,008
2018-01-17	$192.27	$185.00	18.8%	5.4%	14.7%	57.7%	19.7%	2.1%	-1.2%	28.5M	-1.14B	-4.4M	1.28	7.21	7,513	9,618	123,591	172,267
2018-01-18	$191.50	$185.00	18.0%	5.2%	14.8%	51.4%	18.8%	2.4%	-1.3%	20.8M	-1.06B	-4.3M	1.22	13.67	7,643	9,323	124,942	174,422
2018-01-19	$192.17	$185.00	17.2%	5.0%	12.6%	44.3%	18.2%	2.1%	-0.8%	31.3M	-1.13B	-4.2M	0.87	6.05	10,902	9,473	124,215	175,298
2018-01-22	$194.38	$185.00	17.0%	5.0%	12.9%	42.4%	18.2%	1.5%	0.1%	16.4M	-571.2M	-4.2M	1.23	7.92	9,585	11,746	68,838	91,297
2018-01-23	$193.39	$185.00	16.9%	5.1%	12.9%	42.0%	17.5%	1.8%	0.1%	16.2M	-530.9M	-4.3M	0.63	13.89	12,822	8,119	71,997	95,293
2018-01-24	$194.15	$185.00	17.1%	5.2%	12.9%	43.3%	18.8%	2.0%	-0.0%	18.8M	-585.7M	-4.5M	0.74	14.84	15,955	11,745	76,908	98,280
2018-01-25	$197.93	$185.00	17.2%	5.2%	14.2%	44.0%	18.8%	1.7%	0.0%	31.5M	-827.0M	-4.3M	0.62	15.44	21,657	13,341	81,746	101,646
2018-01-26	$198.90	$185.00	17.3%	5.1%	14.2%	45.3%	19.3%	2.0%	-0.0%	22.8M	-852.0M	-4.4M	0.73	6.75	12,906	9,477	83,068	104,325
2018-01-29	$198.53	$190.00	19.1%	5.9%	14.3%	60.9%	21.6%	2.2%	4.6%	22.5M	-770.6M	-4.4M	0.76	15.40	10,718	8,099	80,678	99,381
2018-01-30	$198.20	$190.00	19.4%	6.0%	14.3%	62.7%	21.9%	1.0%	4.8%	23.6M	-764.0M	-4.5M	0.91	20.45	7,108	6,459	83,411	101,515
2018-01-31	$194.80	$190.00	18.7%	5.7%	15.7%	57.1%	20.9%	1.9%	4.2%	14.5M	-571.6M	-4.7M	0.49	14.95	13,211	6,451	83,944	102,650