| Code | Name | High | Low | Close | Volume | Change |
|---|
| QABA | FIRST TRUST EXCHANGE-TRADED FUN | 21.43 | 21.42 | 21.43 | 2,600 | 0.01 |  | 0.05 |
| QADI | QAD Inc. | 4.730 | 4.500 | 4.510 | 59,402 | 0.150 | | 3.22 |
| QBAK | Qualstar Corporation | 1.930 | 1.900 | 1.930 | 17,425 | 0.010 |  | 0.52 |
| QCCO | QC Holdings Inc. | 6.000 | 5.840 | 5.940 | 6,589 | 0.060 | | 1.02 |
| QCLN | First Trust NASDAQ Clean Edge U.S. | 14.30 | 14.09 | 14.19 | 76,850 | 0.15 | | 1.05 |
| QCOM | QUALCOMM Incorporated | 45.25 | 44.76 | 45.10 | 12,560,055 | 0.01 | | 0.02 |
| QCOR | Questcor Pharmaceuticals Inc. | 4.160 | 4.020 | 4.160 | 403,689 | 0.110 | | 2.72 |
| QCRH | QCR Holdings Inc. | 8.970 | 8.000 | 8.560 | 6,850 | 0.580 | | 6.35 |
| QDEL | Quidel Corporation | 13.41 | 13.22 | 13.23 | 465,713 | 0.04 | | 0.30 |
| QDHC | QuadraMed Corporation | 6.670 | 6.450 | 6.520 | 13,086 | 0.070 | | 1.09 |
| QELP | Quest Energy Partners L.P. | 1.930 | 1.800 | 1.840 | 14,292 | 0.070 | | 3.66 |
| QGEN | Qiagen N.V. | 21.96 | 21.44 | 21.51 | 1,844,110 | 0.65 | | 2.93 |
| QGLY | Quigley Corporation (The) | 2.150 | 2.150 | 2.150 | 167 | 0.140 | | 6.11 |
| QKLS | QKL STORES INC | 6.280 | 5.750 | 6.000 | 224,705 | 0.250 | | 4.35 |
| QLGC | QLogic Corporation | 18.89 | 18.55 | 18.81 | 1,038,610 | 0.10 | | 0.53 |
| QLTI | QLT Inc. | 3.730 | 3.640 | 3.690 | 398,618 | 0.030 | | 0.81 |
| QLTY | Quality Distribution Inc. | 3.560 | 3.380 | 3.540 | 8,448 | 0.010 | | 0.28 |
| QQEW | First Trust NASDAQ-100 Equal Weighted | 18.57 | 18.52 | 18.54 | 3,300 | 0.12 | | 0.64 |
| QQQQ | PowerShares QQQ Trust Series 1 | 43.55 | 43.28 | 43.44 | 70,881,337 | 0.22 | | 0.50 |
| QQQX | NASDAQ Premium Income and Growth Fund | 14.68 | 14.39 | 14.61 | 75,703 | 0.12 | | 0.81 |
| QQXT | First Trust NASDAQ-100 Ex-Technology | 17.02 | 16.91 | 17.00 | 5,663 | 0.06 | | 0.35 |
| QRCP | Quest Resource Corporation | 0.4300 | 0.4200 | 0.4300 | 46,998 | 0.0000 |  | 0.00 |
| QSFT | Quest Software Inc. | 17.10 | 16.85 | 17.01 | 647,195 | 0.00 | | 0.00 |
| QSII | Quality Systems Inc. | 62.22 | 60.50 | 60.92 | 146,729 | 0.60 | | 0.98 |
| QTEC | First Trust NASDAQ-100-Technology Sector | 19.42 | 19.27 | 19.39 | 66,186 | 0.19 | | 0.97 |
| QTWW | Quantum Fuel Systems Technologies | 1.210 | 1.150 | 1.200 | 1,239,856 | 0.020 | | 1.69 |
| QUIK | QuickLogic Corporation | 1.580 | 1.500 | 1.520 | 301,755 | 0.050 | | 3.18 |
| QUIX | Quixote Corporation | 2.030 | 1.900 | 1.980 | 41,472 | 0.060 | | 3.13 |
| QUOT | Quotesmith.com, Inc. | 3.120 | 2.750 | 2.750 | 1,466 | 0.030 | | 1.10 |