| Code | Name | High | Low | Close | Volume | Change | |
|---|
| OABC | OMNIAMERICAN BANCORP INC. | 11.20 | 11.03 | 11.13 | 13,400 | 0.01 |  | 0.09 | 5 |
| OBAF | OBA FINANCIAL SERVICES INC. | 11.00 | 11.00 | 11.00 | 1,000 | 0.03 | | 0.27 | 4 |
| OBAS | Optibase Ltd. | 1.370 | 1.330 | 1.330 | 400 | 0.030 | | 2.21 | 5 |
| OBCI | Ocean Bio-Chem Inc. | 1.760 | 1.690 | 1.700 | 31,700 | 0.050 | | 2.86 | 5 |
| OCCF | Optical Cable Corporation | 2.270 | 2.220 | 2.270 | 800 | 0.060 |  | 2.71 | 5 |
| OCFC | OceanFirst Financial Corp. | 11.90 | 11.36 | 11.40 | 36,400 | 0.47 | | 3.96 | 5 |
| OCLR | Ocular Sciences, Inc. | 11.40 | 10.35 | 11.22 | 411,600 | 0.33 | | 3.03 | 6 |
| OCLS | Oculus Innovative Sciences Inc. | 1.670 | 1.620 | 1.640 | 11,400 | 0.020 | | 1.23 | 5 |
| OCNF | OceanFreight Inc. | 1.0200 | 0.9200 | 0.9300 | 1,263,800 | 0.0400 | | 4.12 | 4 |
| OCNFD | Oceanfreight Inc. | 0.8500 | 0.8000 | 0.8400 | 716,200 | 0.0100 | | 1.20 | 4 |
| OCNW | Occam Networks Inc. | 4.900 | 4.590 | 4.760 | 44,500 | 0.040 | | 0.85 | 4 |
| OCZ | Ocz Technology Group | 2.180 | 1.790 | 2.000 | 275,100 | 0.060 | | 3.09 | 6 |
| ODFL | Old Dominion Freight Line Inc. | 25.21 | 24.67 | 25.06 | 279,400 | 0.07 | | 0.28 | 3 |
| ODSY | Odyssey Healthcare Inc. | 27.01 | 26.99 | 27.01 | 1,406,400 | 0.05 | | 0.19 | 8 |
| OFIX | Orthofix International N.V. | 28.37 | 27.48 | 28.19 | 107,500 | 0.57 | | 2.06 | 4 |
| OFLX | Omega Flex Inc. | 13.45 | 13.25 | 13.32 | 3,500 | 0.11 | | 0.82 | 5 |
| OGXI | Oncogenex Technologies Inc. | 13.25 | 12.98 | 13.03 | 9,400 | 0.05 | | 0.39 | 4 |
| OICO | O. I. Corporation | 7.900 | 7.900 | 7.900 | 200 | 0.070 | | 0.89 | 5 |
| OIIM | O2Micro International | 6.100 | 5.920 | 6.020 | 241,800 | 0.010 | | 0.17 | 4 |
| OINK | Tianli Agritech Inc. | 3.870 | 3.800 | 3.820 | 5,100 | 0.020 | | 0.53 | 5 |
| OKSB | Southwest Bancorp Inc. | 12.52 | 12.00 | 12.37 | 65,200 | 0.11 | | 0.88 | 5 |
| OKSBP | Southwest Bancorp Inc. | 26.86 | 26.68 | 26.74 | 600 | 0.26 | | 0.96 | 5 |
| OLBK | Old Line Bancshares Inc. | 7.900 | 7.890 | 7.900 | 3,100 | 0.050 | | 0.63 | 6 |
| OLCB | Ohio Legacy Corporation | 2.040 | 2.040 | 2.040 | 500 | 0.060 | | 2.86 | 4 |
| OMAB | Grupo Aeroportuario del Centro Norte | 12.22 | 11.91 | 12.18 | 7,700 | 0.16 | | 1.30 | 5 |
| OMCL | Omnicell Inc. | 11.89 | 11.52 | 11.85 | 92,300 | 0.13 | | 1.11 | 6 |
| OMER | OMEROS CORPORATION | 6.550 | 6.100 | 6.220 | 21,200 | 0.050 | | 0.80 | 5 |
| OMEX | Odyssey Marine Exploration Inc. | 1.600 | 1.500 | 1.600 | 151,800 | 0.060 | | 3.90 | 5 |
| OMNI | OMNI Energy Services Corp. | 2.730 | 2.700 | 2.700 | 55,300 | 0.010 | | 0.37 | 5 |
| OMPI | Obagi Medical Products Inc. | 10.78 | 10.47 | 10.61 | 28,900 | 0.14 | | 1.30 | 6 |
| ONAV | Omega Navigation Enterprises Inc. | 1.430 | 1.360 | 1.370 | 10,000 | 0.080 | | 5.52 | 4 |
| ONCY | Oncolytics Biotech Inc. | 3.400 | 3.200 | 3.280 | 114,800 | 0.100 | | 3.14 | 5 |
| ONEQ | Fidelity Nasdaq Composite Index Tracking | 86.77 | 85.80 | 86.77 | 23,600 | 1.03 | | 1.20 | 4 |
| ONFC | Oneida Financial Corp. | 7.800 | 7.750 | 7.750 | 3,600 | 0.050 | | 0.64 | 5 |
| ONFCD | Oneida Financial Corp | 7.910 | 7.830 | 7.900 | 7,300 | 0.010 | | 0.13 | 5 |
| ONNN | ON Semiconductor Corporation | 6.620 | 6.390 | 6.540 | 5,113,900 | 0.120 | | 1.87 | 5 |
| ONSM | Onstream Media Corporation | 1.100 | 1.090 | 1.090 | 2,000 | 0.030 | | 2.68 | 4 |
| ONTY | Oncothyreon Inc . | 3.440 | 3.310 | 3.430 | 54,800 | 0.090 | | 2.69 | 4 |
| ONVI | Onvia Inc. | 3.050 | 2.850 | 3.050 | 1,000 | 0.100 | | 3.39 | 4 |
| ONXX | ONYX Pharmaceuticals Inc. | 25.51 | 24.51 | 25.46 | 593,900 | 0.58 | | 2.33 | 4 |
| OPEN | Open Solutions, Inc. | 55.75 | 54.15 | 55.27 | 165,200 | 1.21 | | 2.24 | 7 |
| OPHC | OptimumBank Holdings Inc. | 0.5000 | 0.4100 | 0.4100 | 10,500 | 0.0700 | | 14.58 | 6 |
| OPLK | Oplink Communications Inc. | 16.87 | 16.61 | 16.78 | 102,300 | 0.06 | | 0.36 | 6 |
| OPMR | Optimal Group Inc. | 2.380 | 2.380 | 2.380 | 200 | 0.000 |  | 0.00 | 5 |
| OPNT | OPNET Technologies Inc. | 16.18 | 15.92 | 16.13 | 84,600 | 0.00 | | 0.00 | 9 |
| OPOF | Old Point Financial Corporation | 12.12 | 12.00 | 12.12 | 1,400 | 0.73 | | 5.68 | 5 |
| OPTC | Optelecom-NKF Inc. | 1.440 | 1.430 | 1.430 | 600 | 0.030 | | 2.14 | 4 |
| OPTR | Optimer Pharmaceuticals Inc. | 8.320 | 8.140 | 8.230 | 156,300 | 0.140 | | 1.73 | 5 |
| OPTT | Ocean Power Technologies Inc. | 4.980 | 4.780 | 4.950 | 18,100 | 0.100 | | 2.06 | 5 |
| OPWV | Openwave Systems Inc | 1.670 | 1.630 | 1.650 | 111,000 | 0.000 | | 0.00 | 5 |
| OPXA | Opexa Therapeutics Inc. | 1.130 | 1.060 | 1.080 | 52,000 | 0.040 | | 3.57 | 4 |
| OPXAW | Opexa Therapeutics Inc. | 0.4500 | 0.4500 | 0.4500 | 2,100 | 0.1300 | | 22.41 | 4 |
| OPXT | Opnext Inc. | 1.450 | 1.390 | 1.430 | 207,100 | 0.000 | | 0.00 | 4 |
| ORBC | ORBCOMM Inc. | 2.000 | 1.900 | 1.950 | 46,400 | 0.020 | | 1.04 | 5 |
| ORBK | Orbotech Ltd. | 10.29 | 10.11 | 10.22 | 28,900 | 0.06 | | 0.59 | 4 |
| ORBT | Orbit International Corporation | 3.150 | 3.000 | 3.150 | 36,600 | 0.150 | | 5.00 | 5 |
| ORCC | Online Resources Corporation | 4.110 | 4.020 | 4.040 | 29,200 | 0.000 | | 0.00 | 6 |
| ORCD | Orchard Enterprises Inc (The) | 2.040 | 2.040 | 2.040 | 100 | 0.010 | | 0.49 | 6 |
| ORCH | Orchid Cellmark Inc. | 1.450 | 1.400 | 1.410 | 3,600 | 0.030 | | 2.08 | 5 |
| ORCL | Oracle Corporation | 22.72 | 22.35 | 22.48 | 18,056,300 | 0.14 | | 0.62 | 5 |
| ORCT | Orckit Communications | 2.390 | 2.320 | 2.390 | 5,600 | 0.040 | | 1.70 | 4 |
| OREX | Orexigen Therapeutics Inc. | 5.950 | 5.420 | 5.430 | 8,330,000 | 0.840 | | 18.30 | 5 |
| ORIT | Oritani Financial Corp. | 9.730 | 9.630 | 9.690 | 127,000 | 0.010 | | 0.10 | 6 |
| ORITD | Oritani Financial Corp. | 9.800 | 9.570 | 9.750 | 289,200 | 0.240 | | 2.52 | 5 |
| ORLY | O'Reilly Automotive Inc. | 49.65 | 48.57 | 49.65 | 1,361,900 | 0.78 | | 1.60 | 7 |
| ORRF | ORRSTOWN FINL SVCS INC | 21.99 | 20.71 | 21.50 | 10,400 | 0.61 | | 2.92 | 5 |
| OSBC | Old Second Bancorp Inc. | 0.8000 | 0.7200 | 0.7700 | 111,800 | 0.0000 | | 0.00 | 4 |
| OSBCP | Old Second Bancorp Inc. | 2.240 | 2.100 | 2.100 | 4,100 | 0.020 | | 0.96 | 3 |
| OSHC | Ocean Shore Holding Co. | 10.70 | 10.51 | 10.60 | 1,900 | 0.03 | | 0.28 | 6 |
| OSIP | OSI Pharmaceuticals Inc. | 57.51 | 57.48 | 57.49 | 4,747,600 | 0.01 | | 0.02 | 7 |
| OSIR | Osiris Therapeutics Inc. | 6.870 | 6.580 | 6.630 | 42,100 | 0.290 | | 4.19 | 6 |
| OSIS | OSI Systems Inc. | 31.85 | 30.99 | 31.54 | 257,400 | 0.40 | | 1.28 | 8 |
| OSTE | Osteotech Inc. | 6.400 | 6.380 | 6.400 | 513,700 | 0.010 | | 0.16 | 7 |
| OSTK | Overstock.com Inc. | 14.89 | 14.48 | 14.88 | 60,200 | 0.22 | | 1.50 | 5 |
| OSUR | OraSure Technologies Inc. | 3.720 | 3.510 | 3.560 | 90,900 | 0.050 | | 1.39 | 5 |
| OTEX | Open Text Corporation | 45.02 | 44.68 | 44.80 | 316,300 | 0.03 | | 0.07 | 7 |
| OTIV | On Track Innovations Ltd | 1.810 | 1.750 | 1.810 | 62,000 | 0.030 | | 1.69 | 4 |
| OTIX | OTIX GLOBAL INC | 4.080 | 3.910 | 4.050 | 37,400 | 0.050 | | 1.25 | 7 |
| OTT | Otelco Inc. | 16.10 | 16.01 | 16.09 | 34,300 | 0.01 | | 0.06 | 7 |
| OTTR | Otter Tail Corporation | 19.37 | 19.14 | 19.30 | 159,000 | 0.06 | | 0.31 | 6 |
| OUTD | Outdoor Channel Holdings Inc. | 5.470 | 5.310 | 5.320 | 15,600 | 0.190 | | 3.45 | 6 |
| OVBC | Ohio Valley Banc Corp. | 20.02 | 19.14 | 19.14 | 500 | 0.20 | | 1.03 | 4 |
| OVLY | OAK VALLEY BANCORP | 5.200 | 4.960 | 5.170 | 2,400 | 0.300 | | 5.48 | 6 |
| OVRL | Overland Storage Inc. | 1.750 | 1.510 | 1.710 | 19,400 | 0.210 | | 14.00 | 5 |
| OVTI | OmniVision Technologies Inc. | 21.63 | 21.08 | 21.39 | 2,668,300 | 0.06 | | 0.28 | 5 |
| OXBT | OXYGEN BIOTHERAPEUTC | 3.000 | 2.930 | 2.930 | 4,900 | 0.040 | | 1.35 | 5 |
| OXGN | OXiGENE Inc. | 0.3100 | 0.2800 | 0.3000 | 864,300 | 0.0100 | | 3.45 | 5 |
| OXPS | optionsXpress Holdings Inc. | 14.78 | 14.52 | 14.75 | 169,400 | 0.03 | | 0.20 | 4 |
| OYOG | OYO Geospace Corporation | 50.00 | 48.60 | 49.99 | 18,100 | 0.01 | | 0.02 | 6 |
| OZRK | Bank of the Ozarks | 38.04 | 37.27 | 37.93 | 54,100 | 0.18 | | 0.48 | 6 |