CBOE: Market Data - Intra-Day Volume

(*All times are Central)

Half Hourly Exchange Volume Report For 8/19/2008

*Your use of CBOE Intra-Day Volume data is subject to the Terms and Conditions of the CBOE Website.

Please note: As of 01/26/2005, all reported volume on Options on the Nasdaq 100 Index Tracking Stock (QQQ), including LEAPS, will be reflected within the "Index" 1/2 Hourly Volume column immediately below rather than within the "Equity" 1/2 Hourly Volume column immediately below.

	Equity Options			Index Options			Interest Rate Options			Total			Put / Call
Time	Calls	Puts	Total	Calls	Puts	Total	Calls	Puts	Total	Calls	Puts	Total	Ratio
9:00 AM	141217	125014	266231	177743	170593	348336	0	0	0	318960	295607	614567	0.93
9:30 AM	252885	242445	495330	281015	316158	597173	0	0	0	533900	558603	1092503	1.05
10:00 AM	352136	361182	713318	374456	447354	821810	0	0	0	726592	808536	1535128	1.11
10:30 AM	443743	438543	882286	445343	549798	995141	0	0	0	889086	988341	1877427	1.11
11:00 AM	517284	502918	1020202	502998	685113	1188111	0	0	0	1020282	1188031	2208313	1.16
11:30 AM	606838	562541	1169379	591246	768124	1359370	0	0	0	1198084	1330665	2528749	1.11
12:00 PM	665870	602022	1267892	650402	856229	1506631	0	0	0	1316272	1458251	2774523	1.11
12:30 PM	715664	644780	1360444	681484	914097	1595581	0	0	0	1397148	1558877	2956025	1.12
1:00 PM	776374	679835	1456209	709934	1003331	1713265	0	0	0	1486308	1683166	3169474	1.13
1:30 PM	821834	726232	1548066	764799	1112297	1877096	0	0	0	1586633	1838529	3425162	1.16
2:00 PM	877259	764884	1642143	787826	1168851	1956677	0	0	0	1665085	1933735	3598820	1.16
2:30 PM	940974	812942	1753916	856091	1236130	2092221	0	0	0	1797065	2049072	3846137	1.14
3:00 PM	1026697	874828	1901525	909043	1298437	2207480	0	0	0	1935740	2173265	4109005	1.12

Final Volume and Open Interest information can be found here.
* Fields with N/A indicate that the data is not available.

Half Hourly Volume Report for Selected Indices For 8/19/2008

	DOW Industrials			S&P 100			S&P 500
Time	Calls	Puts	Total	Calls	Puts	Total	Calls	Puts	Total
9:00 AM	1723	3974	5697	3327	1879	5206	33989	52413	86402
9:30 AM	8035	8333	16368	5110	2843	7953	69166	95811	164977
10:00 AM	8566	18867	27433	5636	3967	9603	113291	152695	265986
10:30 AM	8647	19126	27773	5961	4450	10411	139495	197024	336519
11:00 AM	8949	19760	28709	7177	5217	12394	145261	222593	367854
11:30 AM	17248	20143	37391	7361	5667	13028	151836	239589	391425
12:00 PM	20353	20735	41088	7544	5793	13337	160622	260855	421477
12:30 PM	20474	20946	41420	7766	6098	13864	167571	279900	447471
1:00 PM	20900	21035	41935	8083	6687	14770	171969	346352	518321
1:30 PM	25845	21081	46926	8246	7084	15330	176244	386140	562384
2:00 PM	26626	21205	47831	8741	7625	16366	180445	401975	582420
2:30 PM	27550	21791	49341	9498	8618	18116	198317	424678	622995
3:00 PM	27744	22278	50022	9931	9185	19116	206573	450506	657079

Final Volume and Open Interest information can be found here.
* Fields with N/A indicate that the data is not available.

Daily Open Interest (as-of-close on 8/18/2008)

CBOE Total Open Interest

Call 140565775

Put 125616352

Total 266182127

CBOE Index Interest on 8/18/2008

Option Calls Puts Total
OEX 69806 65094 134900
SPX 4162454 6744950 10907404
NDX 237166 262101 499267
MNX 435055 550707 985762
DJX 392709 304494 697203
DTX 0 31 31

Option Calls Puts Total
DUX 0 0 0
OEX post exp N/A N/A N/A
SPX post exp N/A N/A N/A
NDX post exp N/A N/A N/A
MNX post exp N/A N/A N/A
DJX post exp N/A N/A N/A