COST Options History — December 2019

In December 2019, COST traded between $292.14 and $297.88. ATM implied volatility averaged 18.2%, placing in the 25.1% IV rank vs the trailing year. The 30-day expected move averaged 5.3%. IV traded above realized volatility by 7.6% (HV 20d: 10.5%). Max pain ranged from $265.00 to $297.50. Net GEX was positive for 15 of 21 trading days. Term structure was in contango for 9 of 21 days. Put/call ratio averaged 0.68.

Notable Days

2019-12-13: Highest Volume — 101,004 contracts
2019-12-13: Largest IV drop — 27.3% change
2019-12-03: Highest IV Rank — 55.3%
2019-12-04: Largest Expected Move — 8.0%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$294.65	$292.14	$297.88	$297.88	$293.53
Max Pain	$276.43	$265.00	$297.50	$297.50	$280.00
ATM IV	18.2%	13.6%	23.7%	23.2%	15.1%
Expected Move	5.3%	3.9%	8.0%	7.8%	4.4%
HV 20d	10.5%	8.8%	11.4%	10.3%	11.3%
HV 60d	11.9%	11.2%	12.7%	12.7%	11.2%
IV Rank	25.1%	0.0%	55.3%	52.4%	9.2%
IV Percentile	33.0%	0.0%	76.6%	71.4%	9.5%
Term Structure	-0.1%	-0.8%	0.8%	-0.6%	0.8%
VWIV	18.9%	14.0%	28.5%	26.7%	15.8%
Skew 25d	1.9%	0.8%	3.2%	3.2%	1.6%
Skew 10d	3.8%	1.4%	6.7%	6.4%	3.3%
Call IV 25d	17.4%	13.4%	22.2%	21.5%	14.5%
Put IV 25d	19.4%	14.5%	25.5%	24.7%	16.0%
Bid-Ask Spread %	4.82	1.89	14.56	6.43	2.51
Gamma HHI	0.13	0.07	0.45	0.07	0.08
Net GEX	17.4M	-127.2M	123.2M	-1.5M	28.9M
Net DEX	-595.0M	-823.2M	-316.6M	-554.4M	-624.1M
Net VEX	-4.8M	-5.2M	-4.5M	-5.1M	-4.7M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.68	0.38	0.99	0.75	0.83
Total Volume	29,009.286	6,563	101,004	34,597	21,045
Total OI	208,261.524	188,728	247,391	188,817	197,090

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
2019-12-02	$297.88	$297.50	23.2%	7.8%	10.3%	52.4%	26.7%	3.2%	-0.6%	-1.5M	-554.4M	-5.1M	0.75	6.43	19,795	14,802	84,550	104,267
2019-12-03	$294.78	$297.50	23.7%	8.0%	11.0%	55.3%	27.7%	3.2%	-0.6%	-16.8M	-387.8M	-5.2M	0.81	3.93	13,313	10,733	89,587	108,962
2019-12-04	$296.47	$297.50	23.3%	8.0%	10.5%	53.0%	28.5%	3.2%	-0.8%	-336.5K	-522.0M	-5.2M	0.62	3.49	11,217	6,992	91,351	109,825
2019-12-05	$293.54	$265.00	22.4%	6.1%	10.7%	47.7%	22.2%	2.7%	-0.4%	-43.2M	-317.7M	-5.1M	0.66	10.42	20,144	13,337	94,124	111,881
2019-12-06	$294.92	$265.00	21.8%	6.0%	9.8%	44.6%	21.3%	2.7%	-0.5%	-127.2M	-438.8M	-5.1M	0.99	7.76	11,982	11,861	97,073	114,970
2019-12-09	$295.35	$265.00	22.6%	6.2%	9.5%	48.8%	22.1%	2.8%	-0.6%	9.7M	-547.4M	-5.1M	0.76	4.26	14,268	10,855	89,627	105,768
2019-12-10	$295.75	$270.00	22.8%	6.4%	9.4%	50.4%	22.8%	2.5%	-0.6%	17.5M	-624.3M	-5.0M	0.38	14.56	16,453	6,255	95,583	109,270
2019-12-11	$294.95	$270.00	22.9%	6.4%	9.4%	50.9%	22.5%	2.3%	-0.6%	20.7M	-612.9M	-5.2M	0.64	11.75	15,292	9,821	102,057	111,317
2019-12-12	$297.26	$270.00	22.1%	6.2%	8.8%	46.3%	22.0%	2.1%	-0.4%	40.1M	-823.2M	-5.0M	0.77	6.18	35,453	27,217	106,986	113,702
2019-12-13	$292.14	$270.00	16.1%	4.6%	10.3%	13.1%	16.4%	1.2%	-0.1%	-59.4M	-316.6M	-4.5M	0.77	3.03	57,225	43,779	122,082	125,309
2019-12-16	$293.70	$270.00	15.0%	4.3%	10.6%	7.1%	15.7%	1.4%	-0.1%	29.3M	-589.0M	-4.6M	0.65	1.98	21,222	13,839	104,432	105,319
2019-12-17	$295.40	$275.00	14.6%	4.2%	10.7%	4.7%	14.9%	1.0%	-0.1%	70.4M	-774.0M	-4.7M	0.59	1.89	14,351	8,407	110,358	109,418
2019-12-18	$292.40	$275.00	15.4%	4.4%	10.9%	9.6%	15.5%	0.8%	0.1%	16.9M	-507.6M	-4.7M	0.57	1.91	14,885	8,433	112,867	110,244
2019-12-19	$293.62	$275.00	13.9%	4.0%	11.0%	1.3%	14.0%	1.1%	0.2%	46.8M	-633.3M	-4.7M	0.54	1.97	14,850	7,955	116,179	112,346
2019-12-20	$294.46	$275.00	13.6%	3.9%	11.1%	0.0%	14.0%	1.1%	0.1%	123.2M	-703.9M	-4.6M	0.61	2.08	16,819	10,226	117,581	113,176
2019-12-23	$293.33	$275.00	14.0%	4.0%	11.1%	2.3%	14.2%	1.1%	0.4%	31.2M	-629.3M	-4.6M	0.93	2.32	9,096	8,431	88,685	100,043
2019-12-24	$294.27	$275.00	14.3%	4.1%	11.2%	3.9%	14.8%	1.3%	0.2%	49.4M	-720.2M	-4.7M	0.71	4.38	3,834	2,729	92,170	103,463
2019-12-26	$295.44	$277.50	14.5%	4.2%	11.0%	5.1%	14.8%	1.4%	0.2%	73.5M	-808.5M	-4.6M	0.57	3.56	11,693	6,673	92,596	104,468
2019-12-27	$293.37	$280.00	15.5%	4.5%	11.2%	11.4%	15.9%	1.6%	0.1%	14.2M	-631.6M	-4.7M	0.65	4.08	14,235	9,220	96,318	106,172
2019-12-30	$295.03	$280.00	15.1%	4.4%	11.4%	9.4%	15.7%	1.8%	0.4%	41.4M	-728.8M	-4.7M	0.53	2.71	13,376	7,082	89,837	102,439
2019-12-31	$293.53	$280.00	15.1%	4.4%	11.3%	9.2%	15.8%	1.6%	0.8%	28.9M	-624.1M	-4.7M	0.83	2.51	11,472	9,573	92,429	104,661