| Code | Name | High | Low | Close | Volume | Change | |
|---|
| O | Realty Income Corp | 57.69 | 56.51 | 56.65 | 2,052,600 | -0.86 |  | 1.50 |   |
| OAK | Oaktree Capital Group Llc | 41.30 | 40.75 | 41.10 | 87,200 | 0.00 |  | 0.00 | |
| OAK-A | Oaktree Cap Group Llc Series A Pfd | 25.20 | 25.08 | 25.12 | 25,900 | -0.05 | | 0.18 | |
| OAK-B | Oaktree Capital Group Llc Pfd Unit Ser B | 24.86 | 24.69 | 24.83 | 68,300 | -0.02 | | 0.08 | |
| OAS | Oasis Petroleum Inc | 12.92 | 12.61 | 12.89 | 6,143,000 | 0.21 |  | 1.66 | |
| OBE | Obsidian Energy Ltd | 0.9500 | 0.9200 | 0.9500 | 339,600 | 0.0200 | | 2.15 | |
| OC | Owens Corning Inc | 59.58 | 58.64 | 58.77 | 1,337,400 | -0.02 | | 0.03 | |
| OCN | Ocwen Financial Corp | 4.060 | 3.930 | 4.000 | 444,000 | 0.000 | | 0.00 | |
| ODC | Oil-Dri Corporation of America | 38.90 | 37.67 | 37.91 | 5,300 | 0.09 | | 0.24 | |
| OEC | Orion Engineered Carbons S.A R | 33.25 | 32.30 | 32.30 | 384,800 | -0.15 | | 0.46 | |
| OFC | Corporate Office Properties | 30.55 | 29.68 | 29.73 | 805,600 | -0.80 | | 2.62 | |
| OFG | Oriental Financial Group | 16.85 | 16.50 | 16.75 | 200,600 | 0.10 | | 0.60 | |
| OFG-A | Oriental Fin Mips A | 24.88 | 24.73 | 24.83 | 1,600 | -0.09 | | 0.36 | |
| OFG-B | Oriental Finl Pfd B | 24.44 | 24.39 | 24.40 | 1,500 | -0.15 | | 0.61 | |
| OFG-D | Oriental Financial Group Inc | 25.17 | 25.01 | 25.02 | 2,100 | -0.15 | | 0.60 | |
| OGE | Oge Energy Corp | 37.15 | 36.11 | 36.27 | 1,229,100 | -0.84 | | 2.26 | |
| OGS | One Gas Inc | 82.25 | 79.52 | 80.35 | 250,200 | -1.90 | | 2.31 | |
| OHI | Omega Healthcare Investors | 32.99 | 32.44 | 32.51 | 1,217,700 | -0.41 | | 1.25 | |
| OI | Owens-Illinois | 20.08 | 19.65 | 19.82 | 1,131,400 | 0.16 | | 0.81 | |
| OIA | Invesco Muni Income Trust | 7.700 | 7.640 | 7.670 | 41,000 | -0.030 | | 0.39 | |
| OIB.C | Oi S.A. | 2.600 | 2.460 | 2.470 | 646,400 | -0.030 | | 1.20 | |
| OII | Oceaneering International | 25.99 | 25.06 | 25.73 | 1,311,100 | 0.61 | | 2.43 | |
| OIS | Oil States International | 32.40 | 30.70 | 32.10 | 458,500 | 1.25 | | 4.05 | |
| OKE | Oneok Inc | 69.67 | 69.07 | 69.52 | 3,252,000 | 0.38 | | 0.55 | |
| OLN | Olin Corp | 28.24 | 27.17 | 27.55 | 2,725,600 | -0.18 | | 0.65 | |
| OLP | One Liberty Properties | 28.38 | 27.21 | 27.29 | 40,000 | -0.83 | | 2.95 | |
| OMA.U | One Madison Group | 10.40 | 10.38 | 10.40 | 1,900 | 0.03 | | 0.29 | |
| OMA.W | One Madison Corp. Warrants | 1.160 | 1.150 | 1.160 | 5,000 | 0.000 | | 0.00 | |
| OMAD | One Madison Corporation Class A | 9.740 | 9.730 | 9.730 | 300,500 | 0.030 | | 0.31 | |
| OMC | Omnicom Group Inc | 70.12 | 68.80 | 68.98 | 3,288,400 | -0.32 | | 0.46 | |
| OMF | Onemain Holdings Inc | 35.00 | 33.81 | 34.89 | 515,500 | 0.82 | | 2.41 | |
| OMI | Owens & Minor | 17.30 | 17.04 | 17.15 | 1,006,700 | 0.08 | | 0.47 | |
| OMN | Omnova Solutions Inc | 10.250 | 9.850 | 9.950 | 160,000 | -0.200 | | 1.97 | |
| OMP | Oasis Midstream Partners LP | 21.95 | 21.48 | 21.80 | 59,600 | -0.08 | | 0.37 | |
| ONDK | On Deck Capital Inc | 7.650 | 7.490 | 7.550 | 377,500 | 0.000 | | 0.00 | |
| ONE | Onesmart International Education Group | 8.700 | 8.450 | 8.570 | 36,100 | -0.010 | | 0.12 | |
| OOMA | Ooma Inc | 16.70 | 16.31 | 16.50 | 56,300 | -0.20 | | 1.20 | |
| OPP | Rivernorth/Doubleline Strategic | 17.39 | 17.33 | 17.34 | 16,400 | -0.09 | | 0.52 | |
| OPY | Oppenheimer Holdings | 32.25 | 31.35 | 31.45 | 118,300 | 0.15 | | 0.48 | |
| OR | Osisko Gold Royalties Ltd | 7.645 | 7.390 | 7.620 | 756,600 | 0.200 | | 2.70 | |
| ORA | Ormat Technologies | 56.16 | 55.38 | 56.00 | 180,700 | 0.32 | | 0.57 | |
| ORAN | Orange ADR | 15.96 | 15.89 | 15.91 | 352,800 | -0.04 | | 0.25 | |
| ORC | Orchid Island Capital Inc | 7.540 | 7.450 | 7.450 | 449,000 | -0.050 | | 0.67 | |
| ORCL | Oracle Corp | 49.54 | 48.66 | 49.43 | 20,904,800 | 0.40 | | 0.82 | |
| ORI | Old Republic International Corp | 22.83 | 22.63 | 22.72 | 1,437,300 | 0.11 | | 0.49 | |
| ORN | Orion Group Holdings Inc | 8.290 | 7.990 | 8.080 | 173,000 | -0.030 | | 0.37 | |
| OSB | Norbord Inc | 38.20 | 36.01 | 36.15 | 338,400 | -1.93 | | 5.07 | |
| OSG | Overseas Shipholding Group Inc | 3.410 | 3.310 | 3.330 | 386,300 | -0.010 | | 0.30 | |
| OSK | Oshkosh Truck Corp | 76.12 | 74.93 | 75.50 | 504,800 | 0.75 | | 1.00 | |
| OSLE | Oaktree Specialty Lending Corp | 25.36 | 25.25 | 25.25 | 1,100 | -0.11 | | 0.43 | |
| OUT | Outfront Media Inc | 20.15 | 19.75 | 19.80 | 581,800 | -0.29 | | 1.44 | |
| OXM | Oxford Industries | 89.75 | 86.88 | 87.72 | 126,800 | -2.23 | | 2.48 | |
| OXY | Occidental Petroleum Corp | 79.90 | 78.22 | 79.38 | 3,785,000 | 0.50 | | 0.63 | |
| OZM | Och-Ziff Capital Management | 1.730 | 1.660 | 1.670 | 322,600 | -0.020 | | 1.18 | |