| Code | Name | High | Low | Close | Volume | Change | |
|---|
| O | Realty Income Corp | 57.77 | 57.17 | 57.19 | 1,564,600 | -0.42 |  | 0.73 |   |
| OA | Orbital Atk Inc | 107.2 | 105.5 | 105.6 | 189,500 | -1.6 | | 1.50 | |
| OAK | Oaktree Capital Group Llc | 46.80 | 46.45 | 46.55 | 135,400 | -0.15 | | 0.32 | |
| OAK-A | Five Oaks Investment Corp. 8.75 | 25.03 | 24.96 | 24.96 | 3,600 | -0.07 | | 0.28 | |
| OAKS | Five Oaks Investment Corp | 4.150 | 3.990 | 4.000 | 172,800 | -0.120 | | 2.91 | |
| OAS | Oasis Petroleum Inc | 7.470 | 7.160 | 7.160 | 6,805,900 | -0.180 | | 2.45 | |
| OB | Onebeacon Insurance Group | 18.24 | 18.18 | 18.21 | 109,400 | 0.04 |  | 0.22 | |
| OBE | Obsidian Energy Ltd. | 0.8600 | 0.8200 | 0.8400 | 1,708,200 | -0.0200 | | 2.33 | |
| OC | Owens Corning Inc | 67.48 | 66.78 | 66.83 | 885,400 | -0.38 | | 0.57 | |
| OCIP | Oci Partners LP | 8.355 | 8.250 | 8.350 | 4,900 | -0.050 | | 0.60 | |
| OCN | Ocwen Financial Corp | 2.880 | 2.760 | 2.800 | 2,050,600 | 0.000 |  | 0.00 | |
| ODC | Oil-Dri Corporation of America | 39.98 | 38.12 | 38.28 | 9,400 | -1.24 | | 3.14 | |
| OEC | Orion Engineered Carbons S.A R | 21.23 | 20.45 | 20.45 | 635,100 | -0.40 | | 1.92 | |
| OFC | Corporate Office Properties | 33.24 | 32.68 | 32.69 | 1,140,900 | -0.29 | | 0.88 | |
| OFG | Oriental Financial Group | 9.325 | 8.900 | 8.950 | 228,300 | -0.350 | | 3.76 | |
| OFG-A | Oriental Fin Mips A | 24.14 | 24.04 | 24.04 | 3,000 | -0.10 | | 0.41 | |
| OFG-B | Oriental Finl Pfd B | 24.19 | 24.12 | 24.12 | 500 | 0.32 | | 1.34 | |
| OFG-D | Oriental Financial Group Inc | 24.45 | 24.20 | 24.20 | 1,600 | -0.22 | | 0.88 | |
| OGE | Oge Energy Corp | 35.74 | 35.37 | 35.39 | 556,600 | -0.26 | | 0.73 | |
| OGS | One Gas Inc | 74.84 | 73.94 | 73.96 | 226,000 | -0.59 | | 0.79 | |
| OHI | Omega Healthcare Investors | 32.01 | 31.41 | 31.78 | 2,115,000 | 0.13 | | 0.41 | |
| OI | Owens-Illinois | 24.30 | 24.01 | 24.02 | 1,310,100 | -0.09 | | 0.37 | |
| OIA | Invesco Muni Income Trust | 7.950 | 7.880 | 7.890 | 102,700 | -0.020 | | 0.25 | |
| OIB.C | Oi Sa | 6.500 | 6.410 | 6.450 | 3,100 | -0.130 | | 1.98 | |
| OII | Oceaneering International | 22.48 | 22.03 | 22.24 | 1,583,300 | 0.06 | | 0.27 | |
| OIS | Oil States International | 22.23 | 20.95 | 21.00 | 1,354,600 | -1.05 | | 4.76 | |
| OKE | Oneok Inc | 50.91 | 50.32 | 50.36 | 2,090,400 | -0.25 | | 0.49 | |
| OLN | Olin Corp | 30.57 | 29.58 | 29.62 | 1,238,900 | -0.95 | | 3.11 | |
| OLP | One Liberty Properties | 24.18 | 23.61 | 23.61 | 23,800 | -0.29 | | 1.21 | |
| OMAA | Om Asset Management Plc | 24.70 | 24.53 | 24.70 | 27,600 | 0.15 | | 0.61 | |
| OMAM | Om Asset Management Ltd | 13.74 | 13.26 | 13.26 | 548,800 | -0.46 | | 3.35 | |
| OMC | Omnicom Group Inc | 78.88 | 77.63 | 77.65 | 1,204,000 | -1.01 | | 1.28 | |
| OME | Omega Protein Corp | 16.40 | 15.40 | 15.40 | 352,700 | -0.90 | | 5.52 | |
| OMF | Onemain Holdings Inc | 27.35 | 26.09 | 26.13 | 453,300 | -0.89 | | 3.29 | |
| OMI | Owens & Minor | 28.36 | 27.51 | 27.51 | 690,900 | -0.62 | | 2.20 | |
| OMN | Omnova Solutions Inc | 9.250 | 8.850 | 8.850 | 99,000 | -0.350 | | 3.80 | |
| ONDK | On Deck Capital Inc | 4.890 | 4.740 | 4.770 | 338,800 | -0.120 | | 2.45 | |
| OOMA | Ooma Inc | 7.950 | 7.750 | 7.750 | 87,900 | -0.200 | | 2.52 | |
| OPP | Rivernorth/Doubleline Strategic | 19.05 | 18.95 | 18.96 | 22,500 | -0.08 | | 0.42 | |
| OPY | Oppenheimer Holdings | 16.40 | 15.95 | 16.00 | 41,900 | -0.30 | | 1.84 | |
| OR | Osisko Gold Royalties Ltd | 12.83 | 12.60 | 12.70 | 336,600 | -0.06 | | 0.47 | |
| ORA | Ormat Technologies | 57.12 | 55.61 | 55.61 | 204,500 | -0.93 | | 1.64 | |
| ORAN | Orange Ads | 16.79 | 16.67 | 16.68 | 134,300 | -0.18 | | 1.07 | |
| ORC | Orchid Island Capital Inc | 9.715 | 9.620 | 9.630 | 546,500 | -0.040 | | 0.41 | |
| ORCL | Oracle Corp | 49.31 | 48.55 | 48.55 | 9,661,600 | -0.70 | | 1.42 | |
| ORI | Old Republic International Corp | 19.51 | 19.16 | 19.18 | 948,100 | -0.23 | | 1.18 | |
| ORN | Orion Group Holdings Inc | 5.630 | 5.400 | 5.410 | 84,300 | -0.120 | | 2.17 | |
| OSB | Norbord Inc | 32.86 | 32.23 | 32.39 | 36,100 | -0.32 | | 0.98 | |
| OSG | Overseas Shipholding Group Inc | 2.270 | 1.980 | 2.050 | 748,500 | -0.160 | | 7.24 | |
| OSK | Oshkosh Truck Corp | 74.79 | 73.53 | 73.88 | 504,400 | -0.48 | | 0.65 | |
| OUT | Outfront Media Inc | 22.29 | 22.00 | 22.06 | 516,900 | -0.11 | | 0.50 | |
| OXM | Oxford Industries | 59.92 | 58.51 | 58.65 | 135,400 | -1.22 | | 2.04 | |
| OXY | Occidental Petroleum Corp | 59.71 | 58.92 | 58.92 | 4,145,800 | -0.78 | | 1.31 | |
| OZM | Och-Ziff Capital Management | 2.990 | 2.910 | 2.980 | 525,200 | 0.060 | | 2.05 | |