CBOE: Market Data - Intra-Day Volume

(*All times are Central)

Half Hourly Exchange Volume Report For 5/16/2008

*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	268833	144371	413204	91834	201137	292971	0	0	0	360667	345508	706175	0.96
9:30 AM	467075	252348	719423	202549	375924	578473	0	0	0	669624	628272	1297896	0.94
10:00 AM	605222	346904	952126	278581	461234	739815	0	0	0	883803	808138	1691941	0.91
10:30 AM	748765	439922	1188687	363243	611412	974655	0	0	0	1112008	1051334	2163342	0.95
11:00 AM	853900	504069	1357969	419501	684443	1103944	0	0	0	1273401	1188512	2461913	0.93
11:30 AM	934936	566714	1501650	458271	776469	1234740	0	0	0	1393207	1343183	2736390	0.96
12:00 PM	1036448	630464	1666912	515940	866459	1382399	0	0	0	1552388	1496923	3049311	0.96
12:30 PM	1119750	688501	1808251	583248	916086	1499334	0	0	0	1702998	1604587	3307585	0.94
1:00 PM	1222672	780572	2003244	625803	954663	1580466	0	0	0	1848475	1735235	3583710	0.94
1:30 PM	1351442	848041	2199483	671532	1010727	1682259	0	0	0	2022974	1858768	3881742	0.92
2:00 PM	1465408	914825	2380233	722607	1078340	1800947	0	0	0	2188015	1993165	4181180	0.91
2:30 PM	1612959	984933	2597892	797826	1157626	1955452	0	0	0	2410785	2142559	4553344	0.89
3:00 PM	1853693	1086989	2940682	908465	1280207	2188672	0	0	0	2762158	2367196	5129354	0.86

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 5/16/2008

	DOW Industrials			S&P 100			S&P 500
Time	Calls	Puts	Total	Calls	Puts	Total	Calls	Puts	Total
9:00 AM	2138	237	2375	4238	5795	10033	210841	29624	240465
9:30 AM	3963	277	4240	10074	14500	24574	54952	83692	138644
10:00 AM	4628	1292	5920	13213	18299	31512	92817	140390	233207
10:30 AM	5147	2000	7147	15553	22835	38388	99752	149163	248915
11:00 AM	12216	4030	16246	16839	23857	40696	115306	170284	285590
11:30 AM	14537	4569	19106	18343	25181	43524	128298	193875	322173
12:00 PM	14543	4577	19120	18784	25992	44776	148563	201776	350339
12:30 PM	14564	4581	19145	19448	28199	47647	174654	220746	395400
1:00 PM	14573	4609	19182	21802	30053	51855	191693	231754	423447
1:30 PM	14577	4641	19218	25122	31603	56725	209254	257666	466920
2:00 PM	14779	4668	19447	25897	32369	58266	210098	262164	472262
2:30 PM	15350	5210	20560	27533	34375	61908	224136	292932	517068
3:00 PM	15363	5301	20664	28668	36423	65091	231814	307206	539020

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 5/15/2008)

CBOE Total Open Interest

Call 145893291

Put 137152773

Total 283046064

CBOE Index Interest on 5/15/2008

Option Calls Puts Total
OEX 140534 175645 316179
SPX 4184554 7108049 11292603
NDX 263150 335874 599024
MNX 587499 738818 1326317
DJX 344170 300546 644716
DTX 0 2 2

Option Calls Puts Total
DUX 0 1 1
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