CBOE: Market Data - Intra-Day Volume

(*All times are Central)

Half Hourly Exchange Volume Report For 8/28/2008

*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	136880	100174	237054	85902	78217	164119	0	0	0	222782	178391	401173	0.80
9:30 AM	232690	162133	394823	191537	193354	384891	0	0	0	424227	355487	779714	0.84
10:00 AM	345286	238778	584064	268681	307422	576103	0	0	0	613967	546200	1160167	0.89
10:30 AM	428034	305614	733648	309705	361704	671409	0	0	0	737739	667318	1405057	0.90
11:00 AM	522892	371678	894570	375880	438057	813937	0	0	0	898772	809735	1708507	0.90
11:30 AM	592380	418707	1011087	431484	462041	893525	0	0	0	1023864	880748	1904612	0.86
12:00 PM	642825	455603	1098428	498299	490631	988930	0	0	0	1141124	946234	2087358	0.83
12:30 PM	693426	498110	1191536	535484	521464	1056948	0	0	0	1228910	1019574	2248484	0.83
1:00 PM	755336	544748	1300084	568948	559594	1128542	0	0	0	1324284	1104342	2428626	0.83
1:30 PM	824995	585553	1410548	630145	635947	1266092	0	0	0	1455140	1221500	2676640	0.84
2:00 PM	893057	634953	1528010	674174	676045	1350219	0	0	0	1567231	1310998	2878229	0.84
2:30 PM	965566	689532	1655098	712665	718032	1430697	0	0	0	1678231	1407564	3085795	0.84
3:00 PM	1086976	782705	1869681	770211	763579	1533790	0	0	0	1857187	1546284	3403471	0.83

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 8/28/2008

	DOW Industrials			S&P 100			S&P 500
Time	Calls	Puts	Total	Calls	Puts	Total	Calls	Puts	Total
9:00 AM	639	5038	5677	1797	2929	4726	17670	20852	38522
9:30 AM	2319	6261	8580	2722	3832	6554	59053	57153	116206
10:00 AM	2468	6534	9002	3360	4943	8303	80389	74810	155199
10:30 AM	7622	6619	14241	4622	6122	10744	87520	92280	179800
11:00 AM	9669	7385	17054	6256	8440	14696	101762	117743	219505
11:30 AM	9967	7584	17551	6623	9051	15674	107897	124874	232771
12:00 PM	10062	7728	17790	6803	9771	16574	134339	132630	266969
12:30 PM	10210	8176	18386	7303	10358	17661	142901	144725	287626
1:00 PM	10483	8392	18875	7811	10898	18709	152548	157950	310498
1:30 PM	10502	8485	18987	8209	11539	19748	166465	170729	337194
2:00 PM	10576	8666	19242	9618	12406	22024	170153	179202	349355
2:30 PM	15113	10796	25909	9920	12796	22716	175196	190283	365479
3:00 PM	22303	13484	35787	12831	15139	27970	194970	202252	397222

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 8/27/2008)

CBOE Total Open Interest

Call 152582553

Put 136707487

Total 289290040

CBOE Index Interest on 8/27/2008

Option Calls Puts Total
OEX 91475 92000 183475
SPX 4514058 7372927 11886985
NDX 249939 285635 535574
MNX 453207 592980 1046187
DJX 415098 338688 753786
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