| Code | Name | High | Low | Close | Volume | Change | |
|---|
| O | Realty Income Corp | 73.46 | 72.51 | 72.60 | 1,693,900 | 0.13 |  | 0.18 |   |
| OAK | Oaktree Capital Group Llc | 49.47 | 49.12 | 49.12 | 857,700 | -0.38 |  | 0.77 | |
| OAK-A | Oaktree Cap Group Llc Series A Pfd | 25.18 | 25.11 | 25.15 | 4,900 | 0.04 | | 0.16 | |
| OAK-B | Oaktree Capital Group Llc Pfd Unit Ser B | 25.07 | 24.97 | 25.03 | 27,500 | -0.01 | | 0.02 | |
| OAS | Oasis Petroleum Inc | 6.250 | 5.950 | 5.950 | 9,653,500 | -0.390 | | 6.15 | |
| OBE | Obsidian Energy Ltd | 0.3240 | 0.2900 | 0.2922 | 1,783,300 | -0.0209 | | 6.68 | |
| OC | Owens Corning Inc | 47.11 | 45.86 | 46.28 | 1,681,000 | -1.14 | | 2.40 | |
| OCN | Ocwen Financial Corp | 1.930 | 1.800 | 1.850 | 731,400 | -0.100 | | 5.13 | |
| ODC | Oil-Dri Corp of America | 30.68 | 28.97 | 29.13 | 10,800 | -1.47 | | 4.80 | |
| OEC | Orion Engineered Carbons S.A R | 19.85 | 18.72 | 18.75 | 609,100 | -1.20 | | 6.02 | |
| OFC | Corporate Office Properties | 27.66 | 27.12 | 27.14 | 401,900 | -0.37 | | 1.34 | |
| OFG | Oriental Financial Group | 19.68 | 19.05 | 19.14 | 365,600 | -0.60 | | 3.04 | |
| OFG-A | Oriental Fin Mips A | 25.15 | 25.08 | 25.15 | 1,100 | -0.05 | | 0.21 | |
| OFG-B | Oriental Finl Pfd B | 24.99 | 24.91 | 24.91 | 1,700 | -0.09 | | 0.36 | |
| OFG-D | Oriental Financial Group Inc | 25.74 | 25.55 | 25.74 | 2,400 | 0.14 | | 0.54 | |
| OGE | Oge Energy Corp | 43.34 | 42.89 | 43.11 | 1,249,700 | 0.29 | | 0.68 | |
| OGS | One Gas Inc | 90.25 | 89.21 | 89.24 | 236,200 | -0.21 | | 0.23 | |
| OHI | Omega Healthcare Investors | 37.56 | 36.95 | 36.98 | 2,035,600 | -0.19 | | 0.51 | |
| OI | Owens-Illinois | 19.71 | 19.17 | 19.19 | 791,800 | -0.60 | | 3.03 | |
| OIA | Invesco Muni Income Trust | 7.820 | 7.752 | 7.770 | 43,400 | -0.005 | | 0.07 | |
| OIB.C | Oi S.A. | 2.380 | 2.260 | 2.260 | 800,000 | -0.160 | | 6.61 | |
| OII | Oceaneering International | 16.65 | 15.53 | 15.56 | 934,500 | -1.26 | | 7.49 | |
| OIS | Oil States International | 15.99 | 14.93 | 14.95 | 937,000 | -1.22 | | 7.54 | |
| OKE | Oneok Inc | 69.79 | 68.67 | 69.01 | 2,344,200 | -0.84 | | 1.20 | |
| OLN | Olin Corp | 23.37 | 22.48 | 22.53 | 1,724,600 | -0.96 | | 4.09 | |
| OLP | One Liberty Properties | 29.89 | 29.16 | 29.61 | 147,500 | -0.06 | | 0.20 | |
| OMA.U | One Madison Group | 10.59 | 10.59 | 10.59 | 100 | -0.01 | | 0.09 | |
| OMA.W | One Madison Corp Warrants | 0.9500 | 0.9400 | 0.9500 | 18,000 | -0.0379 | | 3.84 | |
| OMAD | One Madison Corp Cl A | 10.20 | 10.13 | 10.18 | 203,600 | -0.02 | | 0.20 | |
| OMC | Omnicom Group Inc | 75.06 | 73.02 | 73.07 | 1,537,400 | -1.95 | | 2.60 | |
| OMF | Onemain Holdings Inc | 33.02 | 31.58 | 31.86 | 599,600 | -1.56 | | 4.67 | |
| OMI | Owens & Minor | 4.623 | 4.360 | 4.360 | 1,512,600 | -0.210 | | 4.60 | |
| OMN | Omnova Solutions Inc | 7.790 | 7.500 | 7.520 | 203,800 | -0.260 | | 3.34 | |
| OMP | Oasis Midstream Partners LP | 20.75 | 20.04 | 20.53 | 74,000 | -0.11 | | 0.53 | |
| ONDK | On Deck Capital Inc | 5.650 | 5.290 | 5.300 | 530,800 | -0.340 | | 6.03 | |
| ONE | Onesmart International Education Group | 8.290 | 7.500 | 7.860 | 234,300 | -0.450 | | 5.42 | |
| OOMA | Ooma Inc | 14.50 | 13.53 | 13.56 | 90,000 | -0.93 | | 6.42 | |
| OPP | Rivernorth/Doubleline Strategic | 16.57 | 16.40 | 16.51 | 50,600 | -0.04 | | 0.24 | |
| OPY | Oppenheimer Holdings | 26.31 | 24.95 | 25.25 | 69,100 | -1.16 | | 4.39 | |
| OR | Osisko Gold Royalties Ltd | 11.75 | 11.55 | 11.66 | 507,600 | 0.04 | | 0.34 | |
| ORA | Ormat Technologies | 55.17 | 54.34 | 54.65 | 184,100 | -0.43 | | 0.78 | |
| ORAN | Orange ADR | 16.32 | 16.19 | 16.22 | 381,300 | -0.24 | | 1.46 | |
| ORC | Orchid Island Capital Inc | 6.830 | 6.760 | 6.770 | 554,600 | -0.050 | | 0.73 | |
| ORCL | Oracle Corp | 53.88 | 52.74 | 52.77 | 16,201,500 | -1.27 | | 2.35 | |
| ORI | Old Republic International Corp | 20.92 | 20.62 | 20.63 | 1,088,700 | -0.16 | | 0.77 | |
| ORN | Orion Group Holdings Inc | 3.570 | 3.230 | 3.240 | 249,400 | -0.260 | | 7.43 | |
| OSB | Norbord Inc | 26.88 | 26.12 | 26.18 | 374,900 | -0.76 | | 2.82 | |
| OSG | Overseas Shipholding Group Inc | 2.490 | 2.290 | 2.320 | 479,600 | -0.170 | | 6.83 | |
| OSK | Oshkosh Truck Corp | 74.82 | 72.00 | 72.38 | 465,900 | -3.00 | | 3.98 | |
| OSLE | Oaktree Specialty Lending Corp | 25.40 | 25.21 | 25.40 | 4,100 | 0.15 | | 0.59 | |
| OUT | Outfront Media Inc | 23.14 | 22.41 | 22.42 | 599,300 | -0.64 | | 2.78 | |
| OXM | Oxford Industries | 75.05 | 72.93 | 73.83 | 247,000 | -1.26 | | 1.68 | |
| OXY | Occidental Petroleum Corp | 66.85 | 65.13 | 65.24 | 6,138,500 | -2.00 | | 2.97 | |
| OZM | Och-Ziff Capital Management | 16.38 | 15.73 | 15.92 | 82,000 | -0.61 | | 3.69 | |