GDX Options History — October 2017

In October 2017, GDX traded between $22.36 and $23.88. ATM implied volatility averaged 21.8%, placing in the 0.6% IV rank vs the trailing year. The 30-day expected move averaged 6.3%. IV traded above realized volatility by 3.5% (HV 20d: 18.3%). Max pain ranged from $23.00 to $23.50. Net GEX was positive for 13 of 22 trading days. Term structure was in contango for 18 of 22 days. Put/call ratio averaged 0.68.

Notable Days

2017-10-11: Highest Volume — 124,047 contracts
2017-10-12: Largest IV drop — 3.8% change
2017-10-04: Highest IV Rank — 2.4%
2017-10-06: Largest Expected Move — 6.9%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$23.23	$22.36	$23.88	$23.00	$22.50
Max Pain	$23.43	$23.00	$23.50	$23.50	$23.00
ATM IV	21.8%	20.3%	23.6%	23.0%	20.8%
Expected Move	6.3%	6.0%	6.9%	6.4%	6.1%
HV 20d	18.3%	14.3%	24.2%	24.2%	15.7%
HV 60d	21.2%	20.4%	22.1%	22.1%	20.6%
IV Rank	0.6%	0.0%	2.4%	0.2%	1.8%
IV Percentile	0.6%	0.0%	2.4%	0.4%	2.4%
Term Structure	0.3%	-0.8%	0.9%	0.5%	0.7%
VWIV	22.4%	21.1%	24.7%	22.9%	21.7%
Skew 25d	-0.1%	-0.9%	0.6%	-0.2%	0.4%
Skew 10d	-0.4%	-2.1%	1.1%	-0.7%	0.9%
Call IV 25d	22.3%	20.5%	24.0%	23.9%	21.1%
Put IV 25d	22.2%	20.8%	23.8%	23.7%	21.6%
Bid-Ask Spread %	2.71	2.06	3.80	3.46	2.24
Gamma HHI	0.09	0.06	0.28	0.06	0.07
Net GEX	7.9M	-11.5M	69.1M	1.7M	-9.0M
Net DEX	-90.7M	-424.4M	315.1M	9.4M	233.4M
Net VEX	-7.9M	-8.6M	-7.1M	-8.2M	-7.1M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.68	0.21	1.15	0.57	1.03
Total Volume	80,492.773	37,000	124,047	83,375	42,777
Total OI	2,673,897.136	2,411,500	2,847,191	2,626,161	2,541,898

Daily Data (22 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
2017-10-02	$23.00	$23.50	23.0%	6.4%	24.2%	0.2%	22.9%	-0.2%	0.5%	1.7M	9.4M	-8.2M	0.57	3.46	53,172	30,203	1,440,612	1,185,549
2017-10-03	$23.25	$23.50	23.2%	6.3%	23.2%	0.8%	22.3%	-0.1%	0.3%	9.1M	-117.8M	-8.3M	0.96	3.35	49,852	47,966	1,460,162	1,196,097
2017-10-04	$23.42	$23.50	23.6%	6.5%	23.3%	2.4%	22.6%	-0.1%	0.1%	11.9M	-188.7M	-8.5M	0.21	2.41	76,895	16,344	1,481,296	1,231,693
2017-10-05	$23.22	$23.50	23.1%	6.9%	21.0%	0.5%	24.7%	0.0%	0.3%	7.2M	-87.1M	-8.4M	0.60	3.79	58,842	35,204	1,477,849	1,233,604
2017-10-06	$23.52	$23.50	23.4%	6.9%	21.8%	1.8%	24.3%	-0.3%	0.1%	69.1M	-267.2M	-8.6M	0.43	2.33	79,955	34,332	1,503,407	1,251,075
2017-10-09	$23.75	$23.50	23.0%	6.7%	19.7%	0.2%	23.9%	0.1%	0.5%	21.7M	-359.6M	-8.5M	0.65	2.85	55,049	35,973	1,481,820	1,231,881
2017-10-10	$23.59	$23.50	22.8%	6.7%	19.6%	0.0%	23.5%	0.1%	0.5%	18.2M	-278.7M	-8.3M	0.64	3.52	59,820	38,549	1,491,000	1,244,509
2017-10-11	$23.79	$23.50	22.8%	6.7%	18.8%	0.0%	23.7%	0.2%	0.7%	22.3M	-369.7M	-8.4M	0.57	2.44	79,108	44,939	1,504,743	1,269,874
2017-10-12	$23.76	$23.50	21.9%	6.4%	18.6%	0.0%	22.6%	0.1%	0.6%	22.5M	-349.5M	-8.3M	0.41	3.80	45,760	18,643	1,522,033	1,287,507
2017-10-13	$23.88	$23.50	21.9%	6.4%	18.6%	0.0%	22.4%	-0.1%	0.6%	21.3M	-424.4M	-8.2M	0.43	2.31	46,745	20,331	1,536,360	1,295,967
2017-10-16	$23.42	$23.50	21.6%	6.2%	18.6%	0.0%	21.9%	-0.3%	0.0%	5.1M	-133.3M	-7.8M	0.97	2.71	48,534	46,983	1,495,847	1,272,431
2017-10-17	$23.46	$23.50	21.9%	6.3%	18.4%	0.8%	22.2%	-0.7%	-0.8%	5.6M	-150.0M	-7.8M	0.54	2.81	47,602	25,778	1,512,330	1,291,292
2017-10-18	$23.33	$23.50	21.4%	6.1%	17.0%	0.0%	21.6%	-0.7%	-0.5%	-2.2M	-81.1M	-7.8M	0.78	2.68	20,793	16,207	1,537,836	1,291,972
2017-10-19	$23.48	$23.50	21.3%	6.1%	16.9%	0.0%	21.5%	-0.6%	-0.2%	6.5M	-170.2M	-7.7M	0.46	2.72	56,452	25,983	1,538,233	1,293,816
2017-10-20	$23.20	$23.50	21.1%	6.1%	17.1%	0.0%	22.0%	-0.9%	-0.2%	-1.2M	-31.6M	-7.6M	0.62	2.21	60,705	37,817	1,545,731	1,301,460
2017-10-23	$23.17	$23.50	20.7%	6.1%	16.0%	0.0%	21.6%	0.1%	0.5%	-404.2K	-44.2M	-7.4M	0.75	2.34	35,898	26,881	1,255,143	1,156,357
2017-10-24	$22.96	$23.50	20.3%	6.0%	14.6%	0.0%	21.1%	0.1%	0.7%	-3.4M	51.1M	-7.3M	0.57	2.43	38,305	21,703	1,272,083	1,168,578
2017-10-25	$22.76	$23.50	20.6%	6.0%	14.3%	1.2%	21.3%	0.6%	0.7%	-4.6M	127.0M	-7.4M	1.10	2.07	30,979	34,152	1,293,278	1,175,478
2017-10-26	$22.36	$23.50	20.8%	6.1%	15.2%	1.8%	21.8%	0.2%	0.5%	-11.5M	315.1M	-7.1M	0.75	2.06	54,756	40,802	1,308,373	1,187,916
2017-10-27	$22.55	$23.00	20.4%	6.0%	15.3%	0.4%	21.3%	0.4%	0.9%	-11.1M	209.3M	-7.2M	1.15	2.73	27,651	31,734	1,335,557	1,204,059
2017-10-30	$22.77	$23.00	20.7%	6.2%	15.8%	1.4%	21.6%	0.4%	0.5%	-4.5M	112.8M	-7.3M	0.81	2.34	39,120	31,547	1,311,130	1,207,901
2017-10-31	$22.50	$23.00	20.8%	6.1%	15.7%	1.8%	21.7%	0.4%	0.7%	-9.0M	233.4M	-7.1M	1.03	2.24	21,048	21,729	1,320,189	1,221,709