CBOE: Market Data - Intra-Day Volume

(*All times are Central)

Half Hourly Exchange Volume Report For 8/21/2008

*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	202219	105311	307530	71665	85170	156835	0	0	0	273884	190481	464365	0.70
9:30 AM	348896	163784	512680	139342	176616	315958	0	0	0	488238	340400	828638	0.70
10:00 AM	439198	218809	658007	201218	402863	604081	0	0	0	640416	621672	1262088	0.97
10:30 AM	530593	264411	795004	227975	466243	694218	0	0	0	758568	730654	1489222	0.96
11:00 AM	596948	307997	904945	285360	538498	823858	0	0	0	882308	846495	1728803	0.96
11:30 AM	645800	360669	1006469	308285	596329	904614	0	0	0	954085	956998	1911083	1.00
12:00 PM	698623	391994	1090617	342973	629663	972636	0	0	0	1041596	1021657	2063253	0.98
12:30 PM	751405	430335	1181740	373999	661016	1035015	0	0	0	1125404	1091351	2216755	0.97
1:00 PM	799616	456530	1256146	420003	695454	1115457	0	0	0	1219619	1151984	2371603	0.94
1:30 PM	856103	489656	1345759	458751	731957	1190708	0	0	0	1314854	1221613	2536467	0.93
2:00 PM	925238	538006	1463244	499248	825068	1324316	0	0	0	1424486	1363074	2787560	0.96
2:30 PM	996191	588972	1585163	549089	932771	1481860	0	0	0	1545280	1521743	3067023	0.98
3:00 PM	1078129	658235	1736364	631527	1015371	1646898	0	0	0	1709656	1673606	3383262	0.98

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 8/21/2008

	DOW Industrials			S&P 100			S&P 500
Time	Calls	Puts	Total	Calls	Puts	Total	Calls	Puts	Total
9:00 AM	2297	288	2585	1290	1234	2524	11405	8194	19599
9:30 AM	2648	453	3101	1632	1625	3257	20550	26126	46676
10:00 AM	3366	1337	4703	2068	2110	4178	32231	33938	66169
10:30 AM	3393	1789	5182	2393	2642	5035	42594	47345	89939
11:00 AM	3433	2628	6061	2867	3867	6734	49205	56324	105529
11:30 AM	3580	2703	6283	6488	7594	14082	54540	74573	129113
12:00 PM	4047	2780	6827	8419	9666	18085	72586	87077	159663
12:30 PM	4097	3740	7837	9019	10128	19147	87096	98315	185411
1:00 PM	4140	3840	7980	9142	10455	19597	92773	103164	195937
1:30 PM	4152	3996	8148	9515	10742	20257	95628	111657	207285
2:00 PM	4997	4271	9268	10122	11461	21583	110395	131154	241549
2:30 PM	5507	4464	9971	10815	12308	23123	128285	153989	282274
3:00 PM	5968	4761	10729	11547	12770	24317	162001	168820	330821

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 8/20/2008)

CBOE Total Open Interest

Call 144351142

Put 129767753

Total 274118895

CBOE Index Interest on 8/20/2008

Option Calls Puts Total
OEX 76900 72567 149467
SPX 4304350 7087518 11391868
NDX 241640 273098 514738
MNX 446200 560617 1006817
DJX 405514 322741 728255
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