| Code | Name | High | Low | Close | Volume | Change | |
|---|
| O | Realty Income Corp | 57.51 | 56.91 | 56.99 | 3,667,800 | -0.28 |  | 0.49 |   |
| OAK | Oaktree Capital Group Llc | 42.30 | 41.35 | 41.75 | 296,000 | 0.65 |  | 1.58 | |
| OAK-A | Oaktree Cap Group Llc Series A Pfd | 25.10 | 25.00 | 25.07 | 16,600 | 0.06 | | 0.22 | |
| OAK-B | Oaktree Capital Group Llc Pfd Unit Ser B | 24.90 | 24.80 | 24.90 | 22,200 | 0.07 | | 0.28 | |
| OAS | Oasis Petroleum Inc | 13.08 | 12.73 | 12.97 | 6,912,600 | 0.20 | | 1.57 | |
| OBE | Obsidian Energy Ltd | 0.9550 | 0.9300 | 0.9520 | 372,500 | 0.0120 | | 1.28 | |
| OC | Owens Corning Inc | 58.90 | 57.99 | 58.24 | 952,200 | -0.37 | | 0.63 | |
| OCN | Ocwen Financial Corp | 4.000 | 3.910 | 3.970 | 677,800 | -0.020 | | 0.50 | |
| ODC | Oil-Dri Corporation of America | 38.16 | 37.44 | 38.16 | 27,200 | 0.18 | | 0.47 | |
| OEC | Orion Engineered Carbons S.A R | 33.08 | 32.31 | 32.75 | 520,700 | 0.45 | | 1.39 | |
| OFC | Corporate Office Properties | 30.44 | 30.04 | 30.17 | 727,000 | 0.05 | | 0.17 | |
| OFG | Oriental Financial Group | 17.35 | 16.85 | 16.90 | 566,400 | -0.20 | | 1.17 | |
| OFG-A | Oriental Fin Mips A | 24.92 | 24.84 | 24.92 | 1,300 | 0.12 | | 0.48 | |
| OFG-B | Oriental Finl Pfd B | 24.55 | 24.40 | 24.55 | 1,300 | 0.10 | | 0.41 | |
| OFG-D | Oriental Financial Group Inc | 25.19 | 25.08 | 25.19 | 2,800 | 0.12 | | 0.46 | |
| OGE | Oge Energy Corp | 36.91 | 36.40 | 36.69 | 2,244,100 | 0.13 | | 0.36 | |
| OGS | One Gas Inc | 81.92 | 80.45 | 81.39 | 421,700 | 0.24 | | 0.30 | |
| OHI | Omega Healthcare Investors | 33.03 | 32.62 | 32.77 | 1,443,700 | -0.04 | | 0.12 | |
| OI | Owens-Illinois | 19.82 | 19.50 | 19.63 | 2,224,700 | -0.13 | | 0.66 | |
| OIA | Invesco Muni Income Trust | 7.600 | 7.570 | 7.585 | 39,600 | -0.025 | | 0.33 | |
| OIB.C | Oi S.A. | 2.900 | 2.370 | 2.800 | 1,139,600 | 0.280 | | 11.11 | |
| OII | Oceaneering International | 27.31 | 26.38 | 27.26 | 2,430,200 | 0.81 | | 3.06 | |
| OIS | Oil States International | 32.15 | 31.15 | 31.85 | 892,900 | 0.20 | | 0.63 | |
| OKE | Oneok Inc | 69.32 | 66.90 | 69.11 | 5,101,500 | 0.50 | | 0.73 | |
| OLN | Olin Corp | 28.08 | 27.46 | 27.61 | 2,834,800 | -0.22 | | 0.79 | |
| OLP | One Liberty Properties | 28.98 | 27.53 | 28.96 | 185,600 | 1.30 | | 4.70 | |
| OMA.U | One Madison Group | 10.28 | 10.28 | 10.28 | 200 | -0.02 | | 0.19 | |
| 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 | 71.22 | 69.55 | 70.90 | 4,678,200 | 1.26 | | 1.81 | |
| OMF | Onemain Holdings Inc | 35.92 | 35.35 | 35.71 | 645,900 | 0.20 | | 0.56 | |
| OMI | Owens & Minor | 17.36 | 17.08 | 17.16 | 1,235,300 | -0.09 | | 0.52 | |
| OMN | Omnova Solutions Inc | 10.25 | 10.10 | 10.25 | 215,900 | 0.05 | | 0.49 | |
| OMP | Oasis Midstream Partners LP | 21.80 | 21.50 | 21.73 | 46,900 | -0.02 | | 0.09 | |
| ONDK | On Deck Capital Inc | 7.590 | 7.320 | 7.350 | 718,000 | -0.200 | | 2.65 | |
| ONE | Onesmart International Education Group | 9.150 | 8.890 | 8.970 | 223,700 | -0.040 | | 0.44 | |
| OOMA | Ooma Inc | 16.85 | 16.13 | 16.80 | 236,400 | 0.35 | | 2.13 | |
| OPP | Rivernorth/Doubleline Strategic | 17.34 | 17.28 | 17.31 | 15,500 | 0.01 | | 0.03 | |
| OPY | Oppenheimer Holdings | 31.91 | 31.35 | 31.65 | 203,000 | -0.15 | | 0.47 | |
| OR | Osisko Gold Royalties Ltd | 7.640 | 7.490 | 7.590 | 1,983,900 | -0.060 | | 0.78 | |
| ORA | Ormat Technologies | 58.20 | 57.19 | 57.82 | 826,800 | 0.49 | | 0.85 | |
| ORAN | Orange ADR | 16.21 | 16.10 | 16.12 | 290,000 | -0.01 | | 0.06 | |
| ORC | Orchid Island Capital Inc | 7.555 | 7.450 | 7.510 | 1,646,500 | 0.030 | | 0.40 | |
| ORCL | Oracle Corp | 51.12 | 50.35 | 51.10 | 50,752,000 | 0.67 | | 1.33 | |
| ORI | Old Republic International Corp | 23.05 | 22.89 | 22.95 | 7,569,900 | 0.02 | | 0.09 | |
| ORN | Orion Group Holdings Inc | 7.960 | 7.675 | 7.780 | 293,400 | -0.130 | | 1.64 | |
| OSB | Norbord Inc | 35.83 | 34.92 | 35.16 | 183,400 | -0.43 | | 1.21 | |
| OSG | Overseas Shipholding Group Inc | 3.340 | 3.220 | 3.220 | 1,237,600 | -0.090 | | 2.72 | |
| OSK | Oshkosh Truck Corp | 77.05 | 75.78 | 76.00 | 1,019,600 | -0.37 | | 0.48 | |
| OSLE | Oaktree Specialty Lending Corp | 25.28 | 25.20 | 25.21 | 1,900 | -0.01 | | 0.05 | |
| OUT | Outfront Media Inc | 20.28 | 19.92 | 19.98 | 1,180,900 | -0.19 | | 0.94 | |
| OXM | Oxford Industries | 90.60 | 89.26 | 89.58 | 210,200 | 0.18 | | 0.20 | |
| OXY | Occidental Petroleum Corp | 79.76 | 78.31 | 79.60 | 8,386,000 | 0.37 | | 0.47 | |
| OZM | Och-Ziff Capital Management | 1.670 | 1.600 | 1.650 | 218,200 | -0.010 | | 0.60 | |