| Code | Name | High | Low | Close | Volume | Change | |
|---|
| O | Realty Income Corp | 58.50 | 57.40 | 57.57 | 1,104,000 | -0.34 |  | 0.59 |   |
| OA | Orbital Atk Inc | 132.7 | 132.4 | 132.6 | 908,400 | 0.2 |  | 0.18 | |
| OAK | Oaktree Capital Group Llc | 46.60 | 46.00 | 46.55 | 86,000 | 0.45 | | 0.98 | |
| OAK-A | Five Oaks Investment Corp. 8.75 | 25.30 | 25.08 | 25.22 | 4,200 | 0.12 | | 0.49 | |
| OAKS | Five Oaks Investment Corp | 4.370 | 4.190 | 4.270 | 89,800 | 0.060 | | 1.43 | |
| OAS | Oasis Petroleum Inc | 8.810 | 8.560 | 8.620 | 4,498,400 | -0.110 | | 1.26 | |
| OB | Onebeacon Insurance Group | 18.12 | 18.10 | 18.11 | 134,800 | 0.01 | | 0.06 | |
| OBE | Obsidian Energy Ltd. | 1.080 | 1.030 | 1.050 | 724,900 | 0.000 |  | 0.00 | |
| OC | Owens Corning Inc | 76.25 | 75.77 | 75.77 | 590,300 | -0.33 | | 0.43 | |
| OCIP | Oci Partners LP | 8.050 | 7.950 | 8.000 | 79,100 | 0.000 | | 0.00 | |
| OCN | Ocwen Financial Corp | 3.200 | 3.110 | 3.190 | 986,700 | 0.040 | | 1.27 | |
| ODC | Oil-Dri Corporation of America | 46.31 | 45.32 | 46.31 | 3,200 | 0.53 | | 1.16 | |
| OEC | Orion Engineered Carbons S.A R | 22.20 | 21.40 | 22.15 | 450,200 | 0.55 | | 2.55 | |
| OFC | Corporate Office Properties | 32.89 | 32.34 | 32.53 | 314,200 | -0.13 | | 0.40 | |
| OFG | Oriental Financial Group | 9.675 | 9.400 | 9.500 | 547,200 | -0.050 | | 0.52 | |
| OFG-A | Oriental Fin Mips A | 24.68 | 24.41 | 24.60 | 4,200 | 0.02 | | 0.08 | |
| OFG-B | Oriental Finl Pfd B | 24.48 | 24.40 | 24.42 | 1,000 | 0.05 | | 0.21 | |
| OFG-D | Oriental Financial Group Inc | 24.91 | 24.76 | 24.83 | 2,900 | -0.09 | | 0.34 | |
| OGE | Oge Energy Corp | 36.14 | 35.69 | 35.84 | 731,600 | -0.04 | | 0.11 | |
| OGS | One Gas Inc | 74.84 | 73.91 | 73.98 | 141,300 | -0.44 | | 0.59 | |
| OHI | Omega Healthcare Investors | 32.55 | 32.02 | 32.09 | 1,182,400 | -0.22 | | 0.68 | |
| OI | Owens-Illinois | 24.35 | 23.74 | 24.28 | 1,466,200 | 0.07 | | 0.29 | |
| OIA | Invesco Muni Income Trust | 7.940 | 7.910 | 7.910 | 26,300 | 0.000 | | 0.00 | |
| OIB.C | Oi Sa | 8.010 | 7.360 | 8.010 | 13,400 | 0.870 | | 12.18 | |
| OII | Oceaneering International | 26.22 | 25.56 | 25.94 | 791,500 | 0.14 | | 0.54 | |
| OIS | Oil States International | 25.40 | 24.80 | 25.10 | 514,000 | -0.15 | | 0.59 | |
| OKE | Oneok Inc | 55.06 | 54.20 | 54.70 | 2,765,600 | -0.36 | | 0.65 | |
| OLN | Olin Corp | 34.02 | 33.46 | 33.78 | 1,014,100 | -0.16 | | 0.47 | |
| OLP | One Liberty Properties | 24.18 | 23.73 | 23.73 | 52,600 | -0.62 | | 2.55 | |
| OMAA | Om Asset Management Plc | 24.97 | 24.88 | 24.95 | 24,500 | 0.03 | | 0.12 | |
| OMAM | Om Asset Management Ltd | 13.99 | 13.67 | 13.96 | 287,600 | 0.26 | | 1.90 | |
| OMC | Omnicom Group Inc | 75.09 | 74.09 | 75.00 | 1,482,900 | 0.77 | | 1.04 | |
| OME | Omega Protein Corp | 16.40 | 16.00 | 16.35 | 91,400 | 0.35 | | 2.19 | |
| OMF | Onemain Holdings Inc | 28.19 | 27.47 | 28.16 | 226,600 | 0.43 | | 1.55 | |
| OMI | Owens & Minor | 28.85 | 28.30 | 28.50 | 680,000 | 0.18 | | 0.64 | |
| OMN | Omnova Solutions Inc | 9.150 | 8.950 | 9.100 | 114,800 | 0.100 | | 1.11 | |
| ONDK | On Deck Capital Inc | 4.760 | 4.590 | 4.610 | 170,700 | -0.140 | | 2.95 | |
| OOMA | Ooma Inc | 9.750 | 9.525 | 9.750 | 83,600 | 0.100 | | 1.04 | |
| OPP | Rivernorth/Doubleline Strategic | 19.15 | 19.05 | 19.06 | 24,500 | -0.04 | | 0.21 | |
| OPY | Oppenheimer Holdings | 17.00 | 16.65 | 16.80 | 47,900 | -0.05 | | 0.30 | |
| OR | Osisko Gold Royalties Ltd | 13.24 | 13.07 | 13.13 | 384,300 | 0.06 | | 0.46 | |
| ORA | Ormat Technologies | 57.99 | 57.60 | 57.68 | 143,700 | -0.10 | | 0.17 | |
| ORAN | Orange Ads | 16.55 | 16.47 | 16.51 | 168,300 | 0.03 | | 0.18 | |
| ORC | Orchid Island Capital Inc | 10.13 | 10.04 | 10.09 | 662,200 | 0.05 | | 0.50 | |
| ORCL | Oracle Corp | 48.43 | 47.92 | 48.16 | 15,341,900 | 0.19 | | 0.40 | |
| ORI | Old Republic International Corp | 19.70 | 19.42 | 19.60 | 718,600 | 0.07 | | 0.36 | |
| ORN | Orion Group Holdings Inc | 5.910 | 5.765 | 5.840 | 57,400 | -0.010 | | 0.17 | |
| OSB | Norbord Inc | 40.19 | 39.16 | 39.67 | 50,900 | 0.38 | | 0.97 | |
| OSG | Overseas Shipholding Group Inc | 2.700 | 2.420 | 2.440 | 811,700 | -0.220 | | 8.27 | |
| OSK | Oshkosh Truck Corp | 80.00 | 79.04 | 79.72 | 426,100 | 0.16 | | 0.20 | |
| OUT | Outfront Media Inc | 21.47 | 20.92 | 21.04 | 1,439,200 | 0.16 | | 0.77 | |
| OXM | Oxford Industries | 60.20 | 59.52 | 60.16 | 142,600 | 0.42 | | 0.70 | |
| OXY | Occidental Petroleum Corp | 63.49 | 62.57 | 62.94 | 3,412,000 | 0.19 | | 0.30 | |
| OZM | Och-Ziff Capital Management | 3.230 | 2.920 | 3.160 | 1,221,800 | 0.220 | | 7.48 | |