COST Options History — February 2019

In February 2019, COST traded between $206.96 and $218.62. ATM implied volatility averaged 22.5%, placing in the 45.9% IV rank vs the trailing year. The 30-day expected move averaged 6.8%. IV traded above realized volatility by 11.2% (HV 20d: 11.3%). Max pain ranged from $210.00 to $210.00. Net GEX was positive for 15 of 19 trading days. Term structure was in contango for 1 of 19 days. Put/call ratio averaged 0.77.

Notable Days

2019-02-01: Highest Volume — 24,353 contracts
2019-02-04: Largest IV spike — 7.5% change
2019-02-08: Highest IV Rank — 54.0%
2019-02-28: Largest Expected Move — 7.7%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$213.78	$206.96	$218.62	$209.91	$218.60
Max Pain	$210.00	$210.00	$210.00	$210.00	$210.00
ATM IV	22.5%	20.0%	24.1%	20.0%	22.3%
Expected Move	6.8%	6.3%	7.7%	6.4%	7.7%
HV 20d	11.3%	9.2%	13.0%	13.0%	11.8%
HV 60d	28.9%	27.5%	29.7%	29.7%	27.5%
IV Rank	45.9%	31.1%	54.0%	31.1%	45.3%
IV Percentile	72.3%	46.0%	82.5%	46.0%	71.4%
Term Structure	-0.5%	-1.6%	4.7%	4.7%	-1.0%
VWIV	23.8%	21.8%	27.0%	22.5%	27.0%
Skew 25d	3.4%	2.5%	3.9%	2.5%	3.6%
Skew 10d	7.0%	5.7%	8.2%	5.7%	7.1%
Call IV 25d	21.0%	17.3%	22.8%	17.3%	20.6%
Put IV 25d	24.4%	19.9%	26.6%	19.9%	24.2%
Bid-Ask Spread %	3.50	2.38	5.89	3.44	5.89
Gamma HHI	0.11	0.08	0.23	0.23	0.15
Net GEX	6.7M	-22.4M	23.3M	-22.4M	23.3M
Net DEX	-156.7M	-344.1M	136.7M	-13.3M	-294.0M
Net VEX	-3.3M	-3.4M	-3.1M	-3.2M	-3.4M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.77	0.49	0.98	0.80	0.73
Total Volume	12,354.421	6,866	24,353	24,353	12,602
Total OI	124,686.421	105,993	134,896	125,121	128,418

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
2019-02-01	$209.91	$210.00	20.0%	6.4%	13.0%	31.1%	22.5%	2.5%	4.7%	-22.4M	-13.3M	-3.2M	0.80	3.44	13,520	10,833	57,949	67,172
2019-02-04	$210.87	$210.00	21.5%	6.3%	9.8%	39.4%	21.8%	3.1%	-0.6%	110.7K	-56.7M	-3.2M	0.98	3.38	4,968	4,862	58,527	67,456
2019-02-05	$211.49	$210.00	21.7%	6.3%	9.2%	40.4%	22.0%	3.2%	-0.1%	1.4M	-86.9M	-3.2M	0.95	2.53	6,493	6,154	59,343	69,319
2019-02-06	$211.36	$210.00	22.6%	6.3%	9.2%	45.3%	22.3%	3.3%	-0.5%	3.5M	-81.9M	-3.2M	0.50	3.19	6,095	3,051	61,443	70,328
2019-02-07	$208.81	$210.00	23.1%	6.5%	10.0%	48.2%	22.9%	3.8%	-0.6%	-11.3M	56.6M	-3.2M	0.71	3.92	10,770	7,630	60,336	71,073
2019-02-08	$206.96	$210.00	24.1%	6.6%	10.4%	54.0%	23.9%	3.8%	-1.2%	-15.2M	136.7M	-3.3M	0.69	3.17	7,580	5,212	62,179	72,717
2019-02-11	$208.35	$210.00	23.5%	6.6%	10.7%	50.5%	24.1%	3.3%	-0.5%	-5.9M	3.0M	-3.3M	0.91	2.38	3,946	3,608	57,641	66,169
2019-02-12	$211.43	$210.00	22.9%	6.6%	11.6%	49.2%	23.1%	3.4%	-1.2%	3.6M	-117.1M	-3.3M	0.91	3.78	6,868	6,226	58,553	67,250
2019-02-13	$213.27	$210.00	22.8%	6.5%	11.5%	48.4%	22.8%	3.4%	-1.2%	12.3M	-189.6M	-3.2M	0.81	4.45	4,817	3,900	59,540	67,634
2019-02-14	$214.15	$210.00	23.1%	6.7%	11.4%	49.9%	23.0%	3.5%	-1.6%	17.7M	-235.5M	-3.2M	0.94	3.27	5,339	5,041	60,810	68,455
2019-02-15	$217.01	$210.00	22.4%	6.5%	12.2%	45.9%	23.4%	3.4%	-0.3%	16.0M	-344.1M	-3.2M	0.67	2.77	8,302	5,582	61,583	69,508
2019-02-19	$218.62	$210.00	22.6%	6.8%	11.9%	47.3%	24.2%	3.4%	-0.8%	13.7M	-302.8M	-3.1M	0.77	3.00	7,047	5,408	48,086	57,907
2019-02-20	$216.80	$210.00	22.6%	6.9%	12.0%	47.4%	24.8%	3.1%	-1.0%	11.2M	-244.3M	-3.3M	0.64	3.80	8,551	5,479	50,601	60,823
2019-02-21	$215.21	$210.00	23.1%	7.0%	12.4%	50.1%	24.4%	3.9%	-0.7%	9.4M	-180.1M	-3.4M	0.87	3.21	5,661	4,924	54,530	63,279
2019-02-22	$215.83	$210.00	22.4%	6.9%	12.0%	45.8%	22.9%	3.4%	-0.9%	9.1M	-211.7M	-3.4M	0.49	4.42	11,809	5,733	55,717	65,007
2019-02-25	$217.11	$210.00	21.9%	7.1%	11.8%	43.3%	25.4%	3.2%	-0.6%	18.9M	-253.3M	-3.3M	0.59	3.60	6,362	3,776	58,020	62,950
2019-02-26	$218.12	$210.00	22.2%	7.3%	11.7%	45.0%	26.2%	3.3%	-0.8%	21.5M	-286.7M	-3.3M	0.86	3.30	3,686	3,180	59,296	64,260
2019-02-27	$217.94	$210.00	22.2%	7.5%	11.8%	44.8%	26.5%	3.3%	-1.1%	20.5M	-276.0M	-3.4M	0.71	3.05	5,669	4,050	59,742	65,421
2019-02-28	$218.60	$210.00	22.3%	7.7%	11.8%	45.3%	27.0%	3.6%	-1.0%	23.3M	-294.0M	-3.4M	0.73	5.89	7,275	5,327	61,234	67,184