| Code | Name | High | Low | Close | Volume | Change |
| O | Realty Income Corporation | 25.25 | 24.66 | 25.09 | 1,042,401 | 0.23 |  | 0.93 |
| O-D | Realty Income Corp | 24.68 | 24.30 | 24.68 | 2,442 | 0.33 |  | 1.36 |
| O-E | Ope | 24.08 | 23.51 | 23.99 | 5,786 | 0.24 |  | 1.01 |
| OB | Onebeacon Insurance Group, Ltd. | 13.81 | 13.55 | 13.55 | 37,543 | 0.18 |  | 1.31 |
| OC | Owens Corning Inc | 24.32 | 23.78 | 24.04 | 695,064 | 0.43 |  | 1.76 |
| OC.B | OWE CORNING [B STOCK] | 1.810 | 1.700 | 1.700 | 767 | 0.110 |  | 6.08 |
| OCN | Ocwen Financial Corporation | 9.570 | 9.380 | 9.460 | 257,046 | 0.130 |  | 1.36 |
| OCR | Omnicare, Inc. | 23.42 | 23.17 | 23.25 | 972,592 | 0.26 |  | 1.11 |
| OCR-A | Omnicare Cap Tr I | 35.85 | 34.77 | 34.82 | 700 | 1.01 |  | 2.82 |
| OCR-B | Omnicare Cap Tr Ii | 36.51 | 35.54 | 35.54 | 400 | 1.12 |  | 3.06 |
| ODC | Oil-dri Corporation Of America | 15.29 | 15.08 | 15.16 | 11,134 | 0.03 |  | 0.20 |
| ODP | Office Depot, Inc. | 6.590 | 6.310 | 6.360 | 4,156,229 | 0.180 |  | 2.75 |
| OEH | Orient-express Hotels, Ltd. | 8.750 | 8.510 | 8.680 | 377,610 | 0.190 |  | 2.14 |
| OFC | Corporate Office Properties Trust | 34.12 | 33.49 | 33.92 | 673,159 | 0.13 |  | 0.38 |
| OFC-G | Corporate Office Properties Trust | 23.69 | 23.05 | 23.38 | 9,900 | 0.13 |  | 0.56 |
| OFC-H | Corporate Office Properties Trust | 22.64 | 22.64 | 22.64 | 100 | 0.40 |  | 1.80 |
| OFC-J | Corporate Office Properties Trust | 23.25 | 22.85 | 23.25 | 1,200 | 0.31 |  | 1.35 |
| OFG | Oriental Financial Group, Inc. | 9.750 | 9.280 | 9.430 | 231,702 | 0.070 |  | 0.74 |
| OFG-A | Oriental Finl Group Inc | 18.50 | 18.50 | 18.50 | 300 | 0.00 |  | 0.00 |
| OFG-B | Oriental Finl Group Inc | 18.00 | 17.99 | 18.00 | 1,000 | 0.00 |  | 0.00 |
| OGE | Oge Energy Corporation | 34.08 | 33.33 | 34.00 | 531,380 | 0.37 |  | 1.10 |
| OHI | Omega Healthcare Investors, Inc. | 18.11 | 17.80 | 17.92 | 1,790,380 | 0.02 |  | 0.11 |
| OHI-D | Omega Healthcare Invs Inc | 24.00 | 23.75 | 23.75 | 1,300 | 0.22 |  | 0.92 |
| OI | Owens-illinois, Inc. | 32.44 | 31.61 | 32.31 | 1,730,557 | 0.22 |  | 0.69 |
| OIA | Ms Municipal Income Opportunities Trust | 6.310 | 6.150 | 6.200 | 51,053 | 0.010 |  | 0.16 |
| OIB | Ms Municipal Income Opportunities Trust | 6.920 | 6.850 | 6.850 | 13,005 | 0.050 |  | 0.72 |
| OIC | Ms Municipal Income Opportunities Trust | 7.660 | 7.540 | 7.650 | 5,117 | 0.110 |  | 1.46 |
| OII | Oceaneering International, Inc. | 55.66 | 54.30 | 54.44 | 399,990 | 1.59 |  | 2.84 |
| OIS | Oil States International, Inc. | 35.47 | 34.79 | 35.04 | 376,157 | 0.50 |  | 1.41 |
| OKE | Oneok, Inc. | 39.20 | 38.66 | 39.08 | 649,530 | 0.04 |  | 0.10 |
| OKS | Northern Border Partners, L.p. | 57.12 | 56.59 | 56.95 | 87,247 | 0.21 |  | 0.37 |
| OLA | Old Mutual/claymore Long-short Fund | 8.130 | 8.050 | 8.100 | 53,681 | 0.050 |  | 0.61 |
| OLN | Olin Corporation | 17.09 | 16.66 | 17.04 | 826,470 | 0.12 |  | 0.71 |
| OLP | One Liberty Properties, Inc. | 9.090 | 8.870 | 8.870 | 18,326 | 0.170 |  | 1.88 |
| OMC | Omnicom Group Inc. | 36.20 | 35.66 | 36.14 | 1,607,619 | 0.04 |  | 0.11 |
| OME | Omega Protein Corporation | 4.370 | 4.090 | 4.350 | 127,456 | 0.040 |  | 0.93 |
| OMG | Om Group, Inc. | 32.06 | 30.92 | 31.66 | 385,019 | 0.13 |  | 0.41 |
| OMI | Owens & Minor, Inc. | 39.59 | 38.84 | 39.03 | 544,970 | 0.46 |  | 1.16 |
| OMN | Omnova Solutions Inc. | 7.060 | 6.750 | 7.000 | 296,518 | 0.210 |  | 3.09 |
| OMX | Boise Cascade Corporation | 11.58 | 11.10 | 11.31 | 1,153,901 | 0.06 |  | 0.53 |
| ONB | Old National Bancorp Capital Trust I | 11.43 | 11.18 | 11.40 | 745,491 | 0.12 |  | 1.06 |
| ONB-B | Onb Cap Tr Ii | 25.23 | 24.56 | 24.64 | 6,495 | 0.09 |  | 0.36 |
| ONE-W | Bank One Corporation | 24.75 | 24.65 | 24.75 | 33,884 | 0.03 |  | 0.12 |
| OPY | Oppenheimer Holdings, Inc. | 30.73 | 30.00 | 30.61 | 54,940 | 0.36 |  | 1.19 |
| ORA | Ormat Technologies, Inc. | 40.93 | 40.30 | 40.56 | 103,385 | 0.05 |  | 0.12 |
| ORB | Orbital Sciences Corporation | 12.72 | 12.51 | 12.64 | 263,917 | 0.04 |  | 0.32 |
| ORH | Odyssey Re Holdings Corporation | 65.03 | 64.99 | 64.99 | 158,800 | 0.02 |  | 0.03 |
| ORH-A | Odyssey Re Hldgs Corp | 24.98 | 24.70 | 24.70 | 8,900 | 0.09 |  | 0.36 |
| ORH-B | Odyssey Re Hldgs Corp | 20.75 | 20.65 | 20.65 | 17,340 | 0.10 |  | 0.48 |
| ORI | Old Republic International Corporation | 10.81 | 10.71 | 10.71 | 552,177 | 0.10 |  | 0.93 |
| ORN | ORION MARINE GROUP INC | 19.15 | 18.69 | 19.08 | 244,679 | 0.07 |  | 0.37 |
| OSG | Overseas Shipholding Group, Inc. | 39.78 | 38.82 | 39.24 | 280,968 | 0.55 |  | 1.38 |
| OSK | Oshkosh Truck Corporation | 38.97 | 37.61 | 37.97 | 1,641,071 | 1.19 |  | 3.04 |
| OSM | Slm Corporation | 13.15 | 12.78 | 13.04 | 4,340 | 0.13 |  | 1.01 |
| OSP | OSG AMERICA LP | 10.24 | 10.21 | 10.22 | 26,214 | 0.00 |  | 0.00 |
| OTE | Hellenic Telecommunication Organization, | 7.820 | 7.680 | 7.720 | 44,628 | 0.190 |  | 2.40 |
| OWW | ORBITZ WORLDWIDE INC | 5.950 | 5.770 | 5.900 | 320,413 | 0.070 |  | 1.17 |
| OXM | Oxford Industries, Inc. | 22.04 | 21.41 | 21.56 | 90,301 | 0.11 |  | 0.51 |
| OXY | Occidental Petroleum Corporation | 81.12 | 79.08 | 79.99 | 7,067,062 | 1.54 |  | 1.89 |
| OZM | OCH ZIFF CAPITAL MANAGEMENT GR | 11.57 | 11.20 | 11.28 | 82,641 | 0.40 |  | 3.42 |