CBOE: Market Data - Intra-Day Volume

(*All times are Central)

Half Hourly Exchange Volume Report For 10/10/2008

*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	204720	258054	462774	192836	559291	752127	0	30	30	397556	817375	1214931	2.06
9:30 AM	410731	500693	911424	419742	874118	1293860	0	30	30	830473	1374841	2205314	1.66
10:00 AM	596013	678962	1274975	588132	1141350	1729482	0	30	30	1184145	1820342	3004487	1.54
10:30 AM	725609	818981	1544590	731401	1322076	2053477	0	30	30	1457010	2141087	3598097	1.47
11:00 AM	869818	970451	1840269	869539	1545186	2414725	0	30	30	1739357	2515667	4255024	1.45
11:30 AM	1006228	1117266	2123494	1022799	1750060	2772859	0	33	33	2029027	2867359	4896386	1.41
12:00 PM	1118286	1223439	2341725	1136893	1863811	3000704	0	33	33	2255179	3087283	5342462	1.37
12:30 PM	1200040	1317417	2517457	1262654	1982735	3245389	0	33	33	2462694	3300185	5762879	1.34
1:00 PM	1317959	1429888	2747847	1429434	2164436	3593870	0	33	33	2747393	3594357	6341750	1.31
1:30 PM	1448566	1584706	3033272	1568562	2358915	3927477	0	33	33	3017128	3943654	6960782	1.31
2:00 PM	1555527	1685875	3241402	1699999	2526379	4226378	0	33	33	3255526	4212287	7467813	1.29
2:30 PM	1752412	1842074	3594486	1895094	2761626	4656720	0	33	33	3647506	4603733	8251239	1.26
3:00 PM	1956619	1981751	3938370	2066597	2968475	5035072	0	33	33	4023216	4950259	8973475	1.23

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 10/10/2008

	DOW Industrials			S&P 100			S&P 500
Time	Calls	Puts	Total	Calls	Puts	Total	Calls	Puts	Total
9:00 AM	10753	17154	27907	5540	4039	9579	16327	43825	60152
9:30 AM	26399	23419	49818	8644	15400	24044	78197	153748	231945
10:00 AM	27333	26554	53887	12735	18710	31445	113478	280137	393615
10:30 AM	28764	27095	55859	15947	22147	38094	143690	384285	527975
11:00 AM	29537	28072	57609	17548	23436	40984	182713	423391	606104
11:30 AM	29965	29409	59374	22059	29660	51719	231295	498353	729648
12:00 PM	30665	33056	63721	24892	31056	55948	248072	551517	799589
12:30 PM	35555	34660	70215	33255	39387	72642	285521	586219	871740
1:00 PM	36087	36615	72702	38443	43513	81956	309501	621060	930561
1:30 PM	36985	36950	73935	39611	47665	87276	327045	690596	1017641
2:00 PM	37890	45262	83152	40343	48576	88919	364772	749094	1113866
2:30 PM	42169	47514	89683	42918	51274	94192	415852	813970	1229822
3:00 PM	53981	53362	107343	44302	52268	96570	444496	878300	1322796

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 10/9/2008)

CBOE Total Open Interest

Call 168822176

Put 143764627

Total 312586803

CBOE Index Interest on 10/9/2008

Option Calls Puts Total
OEX 163976 110822 274798
SPX 5645543 8131430 13776973
NDX 360189 328926 689115
MNX 458320 655738 1114058
DJX 405402 362029 767431
DTX 0 0 0

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