COST Options History — February 2013

In February 2013, COST traded between $99.45 and $104.15. ATM implied volatility averaged 17.8%, placing in the 52.8% IV rank vs the trailing year. The 30-day expected move averaged 5.1%. IV traded above realized volatility by 4.5% (HV 20d: 13.3%). Max pain ranged from $100.00 to $105.00. Net GEX was positive for 10 of 19 trading days. Term structure was in contango for 2 of 19 days. Put/call ratio averaged 1.43.

Notable Days

2013-02-19: Highest Volume — 11,346 contracts
2013-02-04: Largest IV spike — 31.3% change
2013-02-25: Highest IV Rank — 76.4%
2013-02-25: Largest Expected Move — 6.0%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$101.70	$99.45	$104.15	$104.15	$101.29
Max Pain	$101.05	$100.00	$105.00	$100.00	$100.00
ATM IV	17.8%	13.5%	21.0%	13.5%	19.2%
Expected Move	5.1%	4.3%	6.0%	4.3%	5.7%
HV 20d	13.3%	10.5%	14.2%	10.5%	14.1%
HV 60d	24.1%	20.6%	25.3%	25.2%	20.6%
IV Rank	52.8%	20.8%	76.4%	20.8%	63.1%
IV Percentile	69.8%	5.6%	96.4%	5.6%	86.9%
Term Structure	-1.7%	-2.9%	0.5%	-0.1%	-2.6%
VWIV	18.2%	15.8%	21.5%	16.0%	20.9%
Skew 25d	3.2%	2.7%	3.9%	2.7%	3.0%
Skew 10d	6.4%	5.5%	7.8%	5.8%	5.8%
Call IV 25d	16.4%	14.6%	19.6%	14.6%	18.7%
Put IV 25d	19.6%	17.2%	23.5%	17.2%	21.7%
Bid-Ask Spread %	7.90	4.15	13.31	9.32	12.26
Gamma HHI	0.14	0.11	0.18	0.18	0.12
Net GEX	401.8K	-3.3M	4.7M	4.7M	86.1K
Net DEX	-88.4M	-145.9M	-33.2M	-145.9M	-84.0M
Net VEX	-1.1M	-1.2M	-1.0M	-1.0M	-1.2M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.43	0.18	4.78	0.90	4.78
Total Volume	4,535.053	1,289	11,346	4,584	6,843
Total OI	74,260.895	68,651	78,985	68,651	78,985

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
2013-02-01	$104.15	$100.00	13.5%	4.3%	10.5%	20.8%	16.0%	2.7%	-0.1%	4.7M	-145.9M	-1.0M	0.90	9.32	2,408	2,176	32,611	36,040
2013-02-04	$102.48	$100.00	17.7%	5.0%	12.1%	52.0%	16.9%	2.9%	-1.7%	2.7M	-109.1M	-1.1M	0.99	7.90	2,089	2,077	33,155	36,426
2013-02-05	$103.31	$100.00	14.3%	4.4%	12.0%	26.8%	16.7%	3.1%	0.3%	3.7M	-122.7M	-1.0M	0.43	13.31	3,304	1,408	33,068	36,967
2013-02-06	$101.70	$105.00	17.6%	5.0%	13.4%	51.1%	17.4%	3.3%	-1.8%	1.0M	-84.5M	-1.1M	1.55	6.84	2,356	3,642	32,789	37,613
2013-02-07	$101.85	$105.00	17.2%	4.9%	13.4%	48.2%	16.8%	3.0%	-1.6%	-430.2K	-85.1M	-1.1M	1.87	4.15	837	1,567	33,497	39,053
2013-02-08	$102.79	$100.00	15.0%	4.3%	13.6%	32.3%	15.8%	3.2%	0.5%	3.1M	-107.6M	-1.1M	0.87	7.39	1,388	1,202	33,679	39,119
2013-02-11	$101.99	$100.00	17.4%	5.0%	13.8%	49.8%	16.8%	3.2%	-1.7%	401.2K	-90.1M	-1.1M	0.18	6.70	6,806	1,213	34,239	39,585
2013-02-12	$101.76	$100.00	17.1%	4.9%	13.9%	47.5%	18.1%	3.1%	-1.7%	-111.2K	-96.8M	-1.1M	1.29	6.13	562	727	36,307	39,939
2013-02-13	$101.63	$100.00	17.2%	4.9%	13.6%	48.0%	16.8%	3.0%	-1.8%	-643.8K	-97.6M	-1.1M	1.68	5.39	1,064	1,788	36,307	40,178
2013-02-14	$102.02	$105.00	17.1%	4.9%	13.6%	47.8%	16.7%	2.8%	-1.8%	351.3K	-102.7M	-1.1M	1.01	7.72	981	988	36,292	40,211
2013-02-15	$102.17	$105.00	18.2%	5.2%	13.4%	55.9%	18.0%	3.1%	-2.4%	2.0M	-109.1M	-1.1M	1.60	6.88	2,901	4,653	36,656	40,479
2013-02-19	$101.90	$100.00	18.8%	5.4%	13.5%	60.2%	19.1%	3.7%	-2.9%	1.5M	-91.9M	-1.1M	0.89	5.83	6,004	5,342	33,299	35,821
2013-02-20	$101.08	$100.00	19.4%	5.6%	13.3%	65.1%	19.5%	3.2%	-2.2%	-1.1M	-71.0M	-1.2M	1.73	6.12	1,291	2,232	34,796	39,062
2013-02-21	$100.69	$100.00	19.4%	5.6%	13.4%	64.6%	19.7%	3.6%	-2.1%	-1.9M	-57.5M	-1.2M	1.81	7.32	1,453	2,628	35,216	39,882
2013-02-22	$101.16	$100.00	19.2%	5.5%	13.2%	63.3%	19.4%	3.2%	-2.2%	-1.0M	-73.1M	-1.2M	0.50	7.71	1,382	687	35,762	40,072
2013-02-25	$100.09	$100.00	21.0%	6.0%	13.6%	76.4%	21.5%	3.9%	-2.6%	-2.1M	-48.6M	-1.2M	1.20	9.53	1,578	1,900	36,714	40,038
2013-02-26	$99.45	$100.00	19.6%	5.6%	13.7%	66.2%	20.6%	3.5%	-2.0%	-3.3M	-33.2M	-1.2M	2.55	7.52	1,528	3,900	37,525	40,792
2013-02-27	$100.73	$100.00	19.4%	5.5%	14.2%	64.3%	19.3%	2.8%	-2.2%	-1.3M	-69.6M	-1.2M	1.40	12.06	1,359	1,902	37,809	40,974
2013-02-28	$101.29	$100.00	19.2%	5.7%	14.1%	63.1%	20.9%	3.0%	-2.6%	86.1K	-84.0M	-1.2M	4.78	12.26	1,183	5,660	37,980	41,005