COST Options History — January 2020

In January 2020, COST traded between $291.08 and $313.11. ATM implied volatility averaged 15.8%, placing in the 14.0% IV rank vs the trailing year. The 30-day expected move averaged 4.5%. IV traded above realized volatility by 3.2% (HV 20d: 12.6%). Max pain ranged from $280.00 to $300.00. Net GEX was positive for 19 of 21 trading days. Term structure was in contango for 11 of 21 days. Put/call ratio averaged 0.57.

Notable Days

2020-01-09: Highest Volume — 79,066 contracts
2020-01-31: Largest IV spike — 17.3% change
2020-01-31: Highest IV Rank — 38.7%
2020-01-31: Largest Expected Move — 5.4%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$302.74	$291.08	$313.11	$291.57	$305.13
Max Pain	$292.02	$280.00	$300.00	$280.00	$300.00
ATM IV	15.8%	14.1%	19.8%	15.6%	19.8%
Expected Move	4.5%	4.0%	5.4%	4.5%	5.4%
HV 20d	12.6%	10.1%	14.9%	11.0%	14.9%
HV 60d	11.8%	10.8%	12.8%	11.2%	12.4%
IV Rank	14.0%	2.9%	38.7%	12.4%	38.7%
IV Percentile	22.2%	2.0%	55.6%	17.5%	55.6%
Term Structure	1.0%	-1.9%	5.0%	0.8%	4.4%
VWIV	16.0%	14.6%	19.1%	16.0%	19.1%
Skew 25d	2.0%	1.3%	2.9%	1.3%	2.9%
Skew 10d	3.7%	2.7%	5.9%	2.7%	5.9%
Call IV 25d	15.0%	13.5%	17.4%	15.1%	17.4%
Put IV 25d	16.9%	15.4%	20.3%	16.4%	20.3%
Bid-Ask Spread %	6.64	2.47	16.23	3.04	12.55
Gamma HHI	0.14	0.07	0.33	0.07	0.20
Net GEX	59.0M	-34.1M	200.9M	991.4K	-34.1M
Net DEX	-861.9M	-1.38B	-355.1M	-487.4M	-355.1M
Net VEX	-4.8M	-5.2M	-4.4M	-4.7M	-5.2M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.57	0.27	1.27	0.36	1.27
Total Volume	28,886.524	12,771	79,066	33,107	20,210
Total OI	184,302.762	129,528	228,770	203,480	152,793

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
2020-01-02	$291.57	$280.00	15.6%	4.5%	11.0%	12.4%	16.0%	1.3%	0.8%	991.4K	-487.4M	-4.7M	0.36	3.04	24,272	8,835	94,804	108,676
2020-01-03	$292.12	$280.00	15.4%	4.5%	10.8%	11.4%	16.0%	1.4%	1.0%	-26.0M	-525.0M	-4.9M	0.66	2.47	16,578	10,946	105,105	112,507
2020-01-06	$291.18	$290.00	16.8%	4.6%	10.2%	19.8%	16.2%	2.2%	-1.9%	8.5M	-498.6M	-4.6M	0.43	6.51	22,444	9,758	95,253	107,264
2020-01-07	$291.08	$290.00	16.2%	4.6%	10.1%	16.2%	15.9%	1.9%	0.1%	18.2M	-522.7M	-4.8M	0.29	3.46	17,232	4,956	103,735	110,717
2020-01-08	$295.41	$290.00	15.8%	4.5%	11.4%	13.6%	15.8%	1.6%	0.1%	97.3M	-951.7M	-4.9M	0.41	3.61	30,459	12,584	108,726	112,302
2020-01-09	$299.68	$290.00	14.8%	4.4%	12.5%	7.5%	15.6%	1.5%	0.4%	200.9M	-1.38B	-4.8M	0.27	4.07	62,062	17,004	114,266	114,504
2020-01-10	$296.96	$290.00	14.9%	4.3%	13.0%	8.2%	15.1%	2.2%	0.4%	89.5M	-971.9M	-4.7M	0.71	3.34	18,919	13,355	111,875	115,529
2020-01-13	$299.59	$290.00	15.0%	4.3%	13.0%	8.8%	15.1%	2.1%	-0.1%	62.9M	-1.01B	-4.7M	0.72	3.46	13,632	9,834	95,618	109,314
2020-01-14	$299.62	$290.00	15.1%	4.2%	11.2%	9.5%	14.9%	2.0%	-0.3%	72.7M	-1.02B	-4.7M	0.53	3.27	11,264	5,938	97,772	109,584
2020-01-15	$300.40	$290.00	15.3%	4.3%	11.1%	10.6%	15.5%	1.9%	-0.4%	84.0M	-1.07B	-4.6M	0.38	5.61	12,127	4,653	98,889	111,067
2020-01-16	$302.84	$290.00	14.9%	4.1%	11.3%	7.9%	14.9%	2.1%	-0.6%	129.0M	-1.29B	-4.6M	0.29	16.23	30,390	8,838	99,927	111,774
2020-01-17	$304.13	$290.00	14.1%	4.0%	10.5%	2.9%	14.6%	1.9%	-0.3%	156.0M	-1.34B	-4.4M	0.44	3.95	22,160	9,696	100,111	112,459
2020-01-21	$312.65	$290.00	16.0%	4.6%	13.9%	14.9%	16.6%	2.0%	-0.2%	59.0M	-1.05B	-4.4M	0.40	13.84	39,972	15,914	62,752	66,776
2020-01-22	$311.65	$295.00	15.5%	4.5%	14.1%	12.1%	16.1%	1.7%	-0.0%	77.9M	-995.5M	-4.6M	0.64	5.88	16,516	10,559	69,899	72,542
2020-01-23	$313.11	$295.00	15.7%	4.5%	13.9%	13.1%	16.0%	1.7%	-0.0%	78.1M	-1.05B	-4.7M	0.48	11.58	10,774	5,192	72,181	76,977
2020-01-24	$310.10	$295.00	16.2%	4.7%	14.6%	16.4%	16.4%	1.8%	-0.0%	34.2M	-857.1M	-4.8M	0.81	5.12	14,473	11,697	74,141	78,558
2020-01-27	$310.18	$297.50	17.2%	5.0%	14.6%	22.6%	17.8%	2.5%	4.2%	32.1M	-696.1M	-5.0M	0.84	10.24	12,276	10,350	66,308	72,881
2020-01-28	$311.23	$300.00	15.8%	4.6%	14.2%	13.9%	16.1%	2.3%	4.4%	39.5M	-754.2M	-4.9M	0.73	6.20	7,381	5,390	67,987	76,973
2020-01-29	$309.83	$300.00	15.8%	4.6%	14.4%	14.1%	16.4%	2.2%	4.6%	32.4M	-663.1M	-5.0M	0.52	4.89	8,873	4,612	68,918	78,540
2020-01-30	$309.07	$300.00	16.8%	4.6%	14.2%	20.3%	16.4%	2.1%	5.0%	25.7M	-607.4M	-5.0M	0.73	10.08	8,366	6,126	70,058	80,296
2020-01-31	$305.13	$300.00	19.8%	5.4%	14.9%	38.7%	19.1%	2.9%	4.4%	-34.1M	-355.1M	-5.2M	1.27	12.55	8,906	11,304	70,572	82,221