| Code | Name | High | Low | Close | Volume | Change | |
| AAC | Australia Acquisition Corp. | 9.970 | 9.970 | 9.970 | 20,100 | 0.000 |  | 0.00 | 6 |
| AACC | Asset Acceptance Capital Corp. | 5.950 | 5.890 | 5.910 | 11,400 | 0.020 |  | 0.34 | 7 |
| AACOU | Australia Acquisition Corp. | 10.14 | 10.14 | 10.14 | 300 | 0.02 |  | 0.20 | 7 |
| AACOW | Australia Acquisition Corp. | 0.2000 | 0.2000 | 0.2000 | 200 | 0.0100 |  | 4.76 | 5 |
| AAME | Atlantic American Corporation | 2.800 | 2.720 | 2.750 | 5,200 | 0.000 |  | 0.00 | 6 |
| AAON | AAON Inc. | 19.61 | 19.02 | 19.06 | 50,300 | 0.41 |  | 2.11 | 4 |
| AAPL | Apple Inc. | 556.89 | 541.04 | 546.08 | 20,031,900 | 7.09 |  | 1.28 | 4 |
| AAWW | Atlas Air Worldwide Holdings | 48.16 | 46.78 | 46.89 | 220,300 | 0.63 |  | 1.33 | 6 |
| AAXJ | iShares Trust | 51.92 | 51.23 | 51.28 | 9,223,700 | 1.12 |  | 2.14 | 5 |
| ABAX | ABAXIS Inc. | 34.64 | 34.09 | 34.24 | 77,000 | 0.00 |  | 0.00 | 7 |
| ABCB | Ameris Bancorp | 12.26 | 11.77 | 11.78 | 70,200 | 0.34 |  | 2.81 | 5 |
| ABCD | CAMBIUM LEARNING GROUP INC. | 1.820 | 1.360 | 1.470 | 94,900 | 0.320 |  | 17.88 | 5 |
| ABCO | Advisory Board Company (The) | 95.64 | 93.63 | 95.04 | 163,800 | 0.90 |  | 0.96 | 6 |
| ABFS | Arkansas Best Corporation | 13.29 | 13.03 | 13.04 | 366,100 | 0.03 |  | 0.23 | 3 |
| ABIO | ARCA BIOPHARMA INC. | 0.4700 | 0.4100 | 0.4100 | 44,100 | 0.0300 |  | 6.82 | 4 |
| ABMD | ABIOMED Inc. | 26.17 | 22.98 | 23.22 | 1,827,800 | 0.52 |  | 2.19 | 5 |
| ABTL | Autobytel Inc. | 0.7900 | 0.7500 | 0.7600 | 101,000 | 0.0300 |  | 3.80 | 4 |
| ABVA | Alliance Bankshares Corporation | 4.260 | 4.210 | 4.260 | 1,100 | 0.110 |  | 2.65 | 5 |
| ACAD | ACADIA Pharmaceuticals Inc. | 1.640 | 1.520 | 1.560 | 282,100 | 0.020 |  | 1.27 | 6 |
| ACAS | American Capital Ltd. | 9.570 | 9.260 | 9.280 | 4,654,400 | 0.140 |  | 1.49 | 5 |
| ACAT | Arctic Cat Inc. | 38.37 | 33.34 | 34.21 | 628,000 | 3.76 |  | 9.90 | 5 |
| ACCL | Accelrys Inc. | 7.990 | 7.820 | 7.830 | 65,000 | 0.120 |  | 1.51 | 5 |
| ACET | Aceto Corporation | 8.540 | 8.410 | 8.420 | 100,300 | 0.050 |  | 0.59 | 5 |
| ACFC | Atlantic Coast Federal Corporation | 2.200 | 2.200 | 2.200 | 900 | 0.020 |  | 0.90 | 5 |
| ACFN | Acorn Energy Inc. | 10.48 | 10.00 | 10.23 | 220,100 | 0.04 |  | 0.39 | 4 |
| ACGL | Arch Capital Group Ltd. | 39.34 | 38.87 | 38.91 | 420,900 | 0.12 |  | 0.31 | 6 |
| ACHN | Achillion Pharmaceuticals Inc. | 7.000 | 6.600 | 6.690 | 398,500 | 0.130 |  | 1.91 | 5 |
| ACIW | ACI Worldwide Inc. | 40.36 | 39.91 | 40.01 | 332,400 | 0.11 |  | 0.27 | 6 |
| ACLS | Axcelis Technologies Inc. | 1.190 | 1.070 | 1.070 | 329,400 | 0.080 |  | 6.96 | 3 |
| ACNB | Acnb Corp | 14.70 | 14.61 | 14.61 | 2,500 | 0.29 |  | 1.95 | 6 |
| ACOM | | 23.13 | 21.76 | 22.29 | 856,700 | 0.26 |  | 1.15 | 4 |
| ACOR | Acorda Therapeutics Inc. | 23.48 | 23.12 | 23.22 | 418,700 | 0.14 |  | 0.60 | 4 |
| ACPW | Active Power Inc. | 0.8900 | 0.8500 | 0.8500 | 90,400 | 0.0200 |  | 2.30 | 5 |
| ACRX | Acelrx Pharmaceuticals | 3.650 | 3.600 | 3.600 | 1,800 | 0.050 |  | 1.37 | 5 |
| ACTG | Acacia Research Corporation | 37.83 | 36.24 | 36.56 | 388,900 | 0.99 |  | 2.64 | 4 |
| ACTS | Actions Semiconductor Co. Ltd. | 1.660 | 1.550 | 1.660 | 146,100 | 0.010 |  | 0.60 | 6 |
| ACUR | Acura Pharmaceuticals Inc. | 2.880 | 2.620 | 2.720 | 44,200 | 0.100 |  | 3.82 | 4 |
| ACWI | iShares MSCI ACWI Index Fund | 43.75 | 43.13 | 43.16 | 931,400 | 0.36 |  | 0.83 | 5 |
| ACWX | iShares MSCI ACWI ex US Index Fund | 37.04 | 36.43 | 36.43 | 194,900 | 0.41 |  | 1.11 | 4 |
| ACXM | Acxiom Corporation | 13.85 | 13.44 | 13.73 | 626,200 | 0.27 |  | 2.01 | 6 |
| ADAT | Authentidate Holding Corp. | 0.7800 | 0.7200 | 0.7300 | 24,600 | 0.0400 |  | 5.19 | 5 |
| ADBE | Adobe Systems Incorporated | 32.74 | 32.19 | 32.36 | 4,373,700 | 0.03 |  | 0.09 | 4 |
| ADEP | Adept Technology Inc. | 5.320 | 4.890 | 5.000 | 29,200 | 0.450 |  | 8.26 | 5 |
| ADES | ADA-ES Inc. | 26.93 | 25.01 | 25.21 | 118,500 | 1.72 |  | 6.39 | 7 |
| ADGF | Adams Golf Inc. | 10.82 | 10.78 | 10.80 | 8,800 | 0.02 |  | 0.19 | 6 |
| ADP | AUTOMATIC DATA PROCS | 53.54 | 53.16 | 53.33 | 2,461,200 | 0.22 |  | 0.41 | 4 |
| ADRA | BLDRS Asia 50 ADR Index Fund | 23.18 | 23.18 | 23.18 | 500 | 0.05 |  | 0.22 | 4 |
| ADRD | BLDRS Developed Markets 100 ADR Index | 18.33 | 18.19 | 18.24 | 6,900 | 0.09 |  | 0.49 | 4 |
| ADRE | BLDRS Emerging Markets 50 ADR Index Fund | 37.77 | 37.10 | 37.21 | 15,300 | 0.28 |  | 0.75 | 4 |
| ADRU | BLDRS Europe 100 ADR Index Fund | 18.00 | 18.00 | 18.00 | 1,100 | 0.17 |  | 0.94 | 4 |
| ADSK | Autodesk Inc. | 36.70 | 35.65 | 35.89 | 2,709,400 | 0.56 |  | 1.54 | 5 |
| ADTN | ADTRAN Inc. | 30.59 | 29.63 | 29.63 | 809,800 | 0.67 |  | 2.21 | 5 |
| ADUS | ADDUS HOMECARE CORPORATION- YAHO | 4.160 | 3.990 | 4.000 | 10,500 | 0.190 |  | 4.53 | 5 |
| ADVS | Advent Software Inc. | 27.03 | 26.54 | 26.82 | 124,600 | 0.10 |  | 0.37 | 6 |
| AEGR | Aegerion Pharmaceuticals Inc. | 14.59 | 14.11 | 14.56 | 38,000 | 0.28 |  | 1.96 | 7 |
| AEHR | Aehr Test Systems | 1.430 | 1.140 | 1.200 | 24,100 | 0.000 |  | 0.00 | 4 |
| AEIS | Advanced Energy Industries Inc. | 13.64 | 13.26 | 13.34 | 348,400 | 0.08 |  | 0.60 | 6 |
| AEPI | AEP Industries Inc. | 34.50 | 33.75 | 34.01 | 19,400 | 0.26 |  | 0.76 | 4 |
| AERL | Asia Entn & Resources Ltd | 5.200 | 5.000 | 5.000 | 57,600 | 0.060 |  | 1.19 | 4 |
| AETI | American Electric Technologies Inc. | 4.550 | 4.370 | 4.510 | 2,000 | 0.010 |  | 0.22 | 5 |
| AEY | ADDvantage Technologies Group Inc. | 2.310 | 2.210 | 2.250 | 8,500 | 0.000 |  | 0.00 | 4 |
| AEZS | AEterna Zentaris Inc. | 0.5700 | 0.5400 | 0.5400 | 657,800 | 0.0200 |  | 3.57 | 4 |
| AFAM | Almost Family Inc | 22.42 | 21.63 | 21.68 | 26,800 | 0.36 |  | 1.63 | 3 |
| AFCB | ATHE BANCSHARES CORPORATION | 14.23 | 14.23 | 14.23 | 1,000 | 0.27 |  | 1.86 | 4 |
| AFCE | AFC Enterprises Inc. | 18.23 | 17.89 | 17.96 | 94,500 | 0.08 |  | 0.45 | 7 |
| AFFM | Affirmative Insurance Holdings Inc. | 0.4900 | 0.4500 | 0.4500 | 300 | 0.0000 |  | 0.00 | 4 |
| AFFX | Affymetrix Inc. | 5.090 | 4.910 | 5.070 | 408,300 | 0.040 |  | 0.80 | 6 |
| AFFY | Affymax Inc. | 14.95 | 14.32 | 14.36 | 993,600 | 0.07 |  | 0.49 | 7 |
| AFOP | Alliance Fiber Optic Products Inc. | 8.300 | 8.130 | 8.210 | 17,400 | 0.030 |  | 0.37 | 4 |
| AFSI | AmTrust Financial Services Inc. | 28.99 | 28.51 | 28.85 | 288,800 | 0.22 |  | 0.77 | 6 |
| AGEN | Antigenics Inc. | 6.100 | 5.770 | 5.870 | 97,200 | 0.170 |  | 2.81 | 5 |
| AGII | Argo Group International Holdings Ltd. | 29.03 | 28.69 | 28.81 | 89,400 | 0.14 |  | 0.49 | 5 |
| AGNC | American Capital Agency Corp. | 32.28 | 31.63 | 31.78 | 5,186,500 | 0.30 |  | 0.94 | 6 |
| AGYS | Agilysys Inc. | 8.810 | 8.640 | 8.660 | 106,000 | 0.090 |  | 1.03 | 5 |
| AHGP | Alliance Holdings GP L.P. | 43.50 | 42.19 | 42.35 | 65,400 | 1.19 |  | 2.73 | 5 |
| AHPI | Allied Healthcare Products Inc. | 3.270 | 3.100 | 3.270 | 3,200 | 0.200 |  | 6.51 | 5 |
| AIMC | Altra Holdings Inc. | 17.23 | 16.78 | 17.06 | 153,600 | 0.37 |  | 2.22 | 5 |
| AINV | Apollo Investment Corporation | 7.160 | 7.000 | 7.010 | 861,300 | 0.050 |  | 0.71 | 5 |
| AIRM | Air Methods Corporation | 93.92 | 92.46 | 92.69 | 62,800 | 0.33 |  | 0.35 | 8 |
| AIRT | Air T Inc. | 9.570 | 9.450 | 9.570 | 2,800 | 0.120 |  | 1.27 | 5 |
| AIXG | Aixtron Aktiengesellschaft | 16.38 | 16.10 | 16.26 | 214,400 | 0.04 |  | 0.25 | 4 |
| AKAM | Akamai Technologies Inc. | 30.79 | 29.14 | 29.17 | 5,193,100 | 1.02 |  | 3.38 | 4 |
| AKRX | Akorn Inc. | 13.20 | 12.97 | 13.05 | 1,094,800 | 0.02 |  | 0.15 | 7 |
| ALCO | Alico Inc. | 23.64 | 22.96 | 23.15 | 13,700 | 0.31 |  | 1.32 | 6 |
| ALGN | Align Technology Inc. | 31.40 | 30.78 | 30.89 | 685,100 | 0.36 |  | 1.15 | 5 |
| ALGT | Allegiant Travel Company | 65.05 | 63.86 | 64.19 | 101,200 | 0.05 |  | 0.08 | 7 |
| ALIM | ALIMERA SCIENCES INC | 2.600 | 2.430 | 2.440 | 39,400 | 0.070 |  | 2.79 | 4 |
| ALKS | Alkermes Inc. | 18.24 | 17.94 | 18.22 | 907,800 | 0.23 |  | 1.28 | 6 |
| ALLB | Alliance Bancorp Inc. of Pennsylvania | 11.75 | 11.70 | 11.74 | 1,000 | 0.01 |  | 0.09 | 6 |
| ALLT | Allot Communications Ltd. | 24.19 | 23.65 | 23.83 | 343,400 | 0.43 |  | 1.84 | 4 |
| ALNC | Alliance Financial Corporation | 30.71 | 30.30 | 30.40 | 2,000 | 0.08 |  | 0.26 | 5 |
| ALNY | Alnylam Pharmaceuticals Inc. | 10.58 | 10.27 | 10.29 | 212,800 | 0.18 |  | 1.72 | 4 |
| ALOG | Analogic Corporation | 67.76 | 66.56 | 66.65 | 53,700 | 0.17 |  | 0.25 | 6 |
| ALOT | Astro-Med Inc. | 8.200 | 8.060 | 8.200 | 14,600 | 0.120 |  | 1.49 | 5 |
| ALRN | American Learning Corp New Yor | 0.9700 | 0.9300 | 0.9700 | 4,700 | 0.0300 |  | 3.19 | 5 |
| ALSK | Alaska Communications Systems Group Inc. | 2.050 | 1.780 | 1.850 | 1,089,800 | 0.180 |  | 8.87 | 4 |
| ALTE | Max Capital Group Ltd. | 23.39 | 23.05 | 23.28 | 384,400 | 0.12 |  | 0.52 | 4 |
| ALTH | Allos Therapeutics Inc. | 1.800 | 1.790 | 1.800 | 215,800 | 0.010 |  | 0.56 | 5 |
| ALTI | Altair Nanotechnologies Inc. | 0.6800 | 0.6200 | 0.6700 | 91,200 | 0.0500 |  | 8.06 | 4 |
| ALTR | Altera Corporation | 34.10 | 33.47 | 33.92 | 6,024,700 | 0.37 |  | 1.10 | 4 |
| ALVR | Alvarion Ltd. | 0.5900 | 0.5800 | 0.5800 | 155,400 | 0.0200 |  | 3.33 | 4 |
| ALXA | Alexza Pharmaceuticals Inc. | 0.4200 | 0.3900 | 0.4100 | 775,800 | 0.0000 |  | 0.00 | 4 |
| ALXN | Alexion Pharmaceuticals Inc. | 87.73 | 86.54 | 86.99 | 1,516,200 | 0.26 |  | 0.30 | 5 |
| AMAG | AMAG Pharmaceuticals Inc. | 12.98 | 12.52 | 12.53 | 183,400 | 0.39 |  | 3.02 | 3 |
| AMAP | Autonavi Holdings | 11.74 | 11.17 | 11.53 | 171,900 | 0.03 |  | 0.26 | 5 |
| AMAT | Applied Materials Inc. | 10.90 | 10.65 | 10.66 | 12,208,900 | 0.15 |  | 1.39 | 5 |
| AMCC | Applied Micro Circuits Corporation | 5.790 | 5.430 | 5.570 | 659,000 | 0.110 |  | 2.01 | 4 |
| AMCF | ANDATEE CHINA MARINE FUEL SERVI | 2.560 | 2.370 | 2.490 | 4,500 | 0.200 |  | 7.43 | 4 |
| AMCN | AirMedia Group Inc | 2.360 | 2.200 | 2.310 | 57,400 | 0.030 |  | 1.28 | 4 |
| AMED | Amedisys Inc | 10.55 | 10.23 | 10.26 | 430,500 | 0.05 |  | 0.48 | 2 |
| AMGN | Amgen Inc. | 71.18 | 70.52 | 70.98 | 3,410,900 | 0.30 |  | 0.42 | 5 |
| AMIC | American Independence Corp. | 4.510 | 4.500 | 4.510 | 1,100 | 0.060 |  | 1.35 | 5 |
| AMKR | Amkor Technology Inc. | 4.640 | 4.480 | 4.490 | 908,300 | 0.100 |  | 2.18 | 4 |
| AMLN | Amylin Pharmaceuticals Inc. | 28.02 | 27.10 | 27.54 | 4,915,400 | 0.24 |  | 0.88 | 7 |
| AMNB | American National Bankshares Inc. | 23.52 | 23.20 | 23.40 | 3,200 | 0.01 |  | 0.04 | 6 |
| AMOT | Allied Motion Technologies Inc. | 6.450 | 6.150 | 6.240 | 20,000 | 0.020 |  | 0.32 | 4 |
| AMOV | America Movil S.A.B. de C.V. | 24.58 | 24.13 | 24.40 | 9,200 | 0.00 |  | 0.00 | 5 |
| AMPL | Ampal-American Israel Corporation | 0.1900 | 0.1800 | 0.1800 | 16,400 | 0.0100 |  | 5.26 | 5 |
| AMRB | American River Bankshares | 7.260 | 7.070 | 7.070 | 200 | 0.280 |  | 3.81 | 5 |
| AMRI | Albany Molecular Research Inc. | 3.090 | 3.010 | 3.010 | 119,400 | 0.040 |  | 1.31 | 5 |
| AMRN | Amarin Corporation PLC | 11.68 | 11.13 | 11.24 | 3,561,900 | 0.06 |  | 0.54 | 5 |
| AMRS | Amyris Inc. | 1.760 | 1.570 | 1.580 | 744,500 | 0.220 |  | 12.22 | 4 |
| AMSC | American Superconductor Corporation | 3.980 | 3.830 | 3.840 | 296,700 | 0.040 |  | 1.03 | 4 |
| AMSF | AMERISAFE Inc. | 27.25 | 26.70 | 26.78 | 28,700 | 0.26 |  | 0.96 | 6 |
| AMSG | Amsurg Corp. | 28.80 | 28.32 | 28.39 | 137,600 | 0.21 |  | 0.73 | 5 |
| AMSWA | American Software Inc. | 8.450 | 8.340 | 8.390 | 45,600 | 0.010 |  | 0.12 | 5 |
| AMTC | Ameritrans Capital Corporation | 0.1700 | 0.1400 | 0.1400 | 8,800 | 0.0600 |  | 30.00 | 7 |
| AMTCP | Ameritrans Capital Corporation | 1.710 | 1.400 | 1.400 | 900 | 0.320 |  | 18.60 | 4 |
| AMTD | TD Ameritrade Holding Corporation | 18.47 | 18.22 | 18.38 | 2,578,600 | 0.07 |  | 0.38 | 4 |
| AMWD | American Woodmark Corporation | 17.13 | 16.50 | 16.50 | 28,900 | 0.07 |  | 0.43 | 4 |
| AMZN | Amazon.com Inc. | 228.00 | 222.50 | 224.06 | 5,261,900 | 0.33 |  | 0.15 | 7 |
| ANAC | Anacor Pharmaceuticals Inc. | 5.460 | 5.360 | 5.400 | 19,200 | 0.090 |  | 1.69 | 4 |
| ANAD | ANADIGICS Inc. | 2.100 | 1.900 | 2.050 | 724,500 | 0.100 |  | 5.13 | 5 |
| ANAT | American National Insurance Company | 69.97 | 68.65 | 68.66 | 5,800 | 0.76 |  | 1.09 | 4 |
| ANCB | Anchor Bancorp | 10.75 | 10.72 | 10.75 | 3,700 | 0.00 |  | 0.00 | 6 |
| ANCI | AMERICAN CARESOURCE | 0.5200 | 0.4600 | 0.4700 | 19,900 | 0.0000 |  | 0.00 | 6 |
| ANCX | Access National Corporation | 12.75 | 12.45 | 12.73 | 11,400 | 0.02 |  | 0.16 | 5 |
| ANDE | Andersons Inc. (The) | 47.85 | 46.19 | 46.41 | 131,800 | 1.05 |  | 2.21 | 4 |
| ANEN | Anaren Inc. | 19.30 | 18.90 | 19.10 | 93,900 | 0.00 |  | 0.00 | 7 |
| ANGN | Angeion Corporation | 5.790 | 5.320 | 5.750 | 6,200 | 0.140 |  | 2.50 | 6 |
| ANGO | AngioDynamics Inc. | 12.47 | 12.30 | 12.40 | 87,500 | 0.00 |  | 0.00 | 6 |
| ANIK | Anika Therapeutics Inc. | 14.11 | 13.54 | 13.62 | 93,600 | 0.42 |  | 2.99 | 5 |
| ANLY | Analysts International Corporation | 3.910 | 3.780 | 3.800 | 24,800 | 0.000 |  | 0.00 | 4 |
| ANNB | Annapolis Bancorp Inc. | 6.360 | 6.360 | 6.360 | 500 | 0.010 |  | 0.16 | 5 |
| ANSS | AYS Inc. | 63.76 | 61.80 | 62.32 | 1,148,600 | 0.64 |  | 1.04 | 5 |
| ANTH | ANTHERA PHARMACEUTICALS INC. | 2.150 | 1.970 | 2.010 | 463,900 | 0.090 |  | 4.29 | 6 |
| ANTP | PHAZAR CORP | 2.750 | 2.500 | 2.500 | 2,600 | 0.190 |  | 7.06 | 6 |
| AONE | A123 SYSTEMS INC. | 1.0300 | 0.9200 | 0.9300 | 877,500 | 0.0300 |  | 3.13 | 4 |
| AOSL | ALPHA & OMEGA SEMICONDUCOR LTD. | 9.850 | 9.690 | 9.760 | 28,300 | 0.050 |  | 0.51 | 5 |
| APAGF | APCO Argentina Inc. | 24.74 | 20.06 | 24.02 | 123,000 | 3.35 |  | 16.21 | 4 |
| APEI | American Public Education Inc. | 28.25 | 27.66 | 28.03 | 265,500 | 0.26 |  | 0.94 | 3 |
| APFC | American Pacific Corporation | 8.200 | 8.050 | 8.100 | 19,300 | 0.140 |  | 1.76 | 6 |
| APKT | Acme Packet Inc. | 25.13 | 23.80 | 23.94 | 1,264,500 | 0.57 |  | 2.33 | 4 |
| APOG | Apogee Enterprises Inc. | 16.06 | 15.53 | 15.66 | 219,600 | 0.13 |  | 0.82 | 6 |
| APOL | Apollo Group Inc. | 32.27 | 31.96 | 31.98 | 1,639,400 | 0.01 |  | 0.03 | 4 |
| APPY | AspenBio Pharma Inc. | 0.6600 | 0.6100 | 0.6500 | 800 | 0.0200 |  | 2.99 | 6 |
| APRI | Nexmed Inc. | 2.750 | 2.550 | 2.630 | 138,900 | 0.090 |  | 3.31 | 5 |
| APSA | Alto Palermo S.A. | 14.77 | 13.90 | 14.77 | 5,500 | 0.78 |  | 5.58 | 5 |
| ARAY | Accuray Incorporated | 6.440 | 6.250 | 6.360 | 458,200 | 0.060 |  | 0.95 | 3 |
| ARBA | Ariba Inc. | 38.46 | 37.52 | 38.10 | 1,033,500 | 0.18 |  | 0.47 | 6 |
| ARCC | Ares Capital Corporation | 15.38 | 15.05 | 15.15 | 1,617,000 | 0.14 |  | 0.92 | 5 |
| ARCI | Appliance Recycling Centers of America | 3.980 | 3.720 | 3.980 | 15,300 | 0.020 |  | 0.50 | 5 |
| ARCL | | 11.10 | 11.08 | 11.08 | 129,300 | 0.00 |  | 0.00 | 6 |
| ARCW | Arc Wireless Solutions Inc. | 3.070 | 3.070 | 3.070 | 200 | 0.050 |  | 1.60 | 4 |
| ARDNA | Arden Group Inc. | 84.40 | 84.00 | 84.02 | 500 | 0.57 |  | 0.68 | 4 |
| AREX | Approach Resources Inc. | 30.33 | 29.03 | 29.50 | 492,200 | 0.12 |  | 0.41 | 3 |
| ARGN | Amerigon Incorporated | 13.15 | 12.45 | 12.48 | 374,700 | 0.49 |  | 3.78 | 4 |
| ARIA | ARIAD Pharmaceuticals Inc. | 17.60 | 17.21 | 17.52 | 3,718,000 | 0.25 |  | 1.45 | 7 |
| ARII | American Railcar Industries Inc. | 22.58 | 21.65 | 21.69 | 147,000 | 0.36 |  | 1.63 | 3 |
| ARKR | Ark Restaurants Corp. | 14.90 | 14.84 | 14.90 | 2,000 | 0.10 |  | 0.68 | 4 |
| ARLP | Alliance Resource Partners L.P. | 59.75 | 58.00 | 58.21 | 78,200 | 0.52 |  | 0.89 | 4 |
| ARMH | ARM Holdings plc | 23.48 | 22.97 | 23.02 | 3,316,300 | 0.17 |  | 0.73 | 4 |
| ARNA | Arena Pharmaceuticals Inc. | 5.890 | 5.530 | 5.670 | 26,600,400 | 0.390 |  | 6.44 | 8 |
| AROW | Arrow Financial Corporation | 23.98 | 23.55 | 23.61 | 15,400 | 0.09 |  | 0.38 | 4 |
| ARQL | ArQule Inc. | 6.780 | 6.530 | 6.730 | 447,400 | 0.200 |  | 3.06 | 4 |
| ARRS | Arris Group Inc | 12.51 | 12.23 | 12.25 | 592,600 | 0.12 |  | 0.97 | 5 |
| ARRY | Array BioPharma Inc. | 3.690 | 3.590 | 3.650 | 790,200 | 0.050 |  | 1.39 | 6 |
| ARSD | Arabian American Development Company | 9.720 | 9.040 | 9.280 | 80,400 | 0.000 |  | 0.00 | 8 |
| ARTC | ArthroCare Corporation | 25.00 | 24.54 | 24.61 | 272,000 | 0.10 |  | 0.41 | 4 |
| ARTNA | Artesian Resources Corporation | 19.59 | 19.21 | 19.31 | 10,900 | 0.11 |  | 0.57 | 7 |
| ARTW | Art's-Way Manufacturing Co. Inc. | 7.400 | 7.170 | 7.170 | 2,500 | 0.170 |  | 2.32 | 6 |
| ARTX | Arotech Corporation | 1.0200 | 0.9100 | 0.9400 | 27,100 | 0.0500 |  | 5.05 | 6 |
| ARUN | Aruba Networks Inc. | 16.21 | 15.64 | 15.70 | 3,995,500 | 0.25 |  | 1.57 | 4 |
| ARWR | Arrowhead Research Corporation | 5.090 | 4.860 | 4.950 | 17,300 | 0.090 |  | 1.85 | 4 |
| ASBC | Associated Banc-Corp | 12.99 | 12.78 | 12.78 | 1,269,700 | 0.07 |  | 0.54 | 5 |
| ASBI | Ameriana Bancorp | 6.500 | 6.000 | 6.000 | 6,600 | 0.360 |  | 6.38 | 6 |
| ASCA | Ameristar Casinos Inc. | 18.92 | 18.72 | 18.78 | 110,800 | 0.07 |  | 0.37 | 4 |
| ASCMA | ASCENT MEDIA CORP | 51.93 | 50.23 | 51.42 | 24,800 | 1.14 |  | 2.27 | 5 |
| ASEI | American Science and Engineering Inc. | 52.05 | 50.04 | 50.47 | 223,600 | 0.74 |  | 1.45 | 7 |
| ASFI | Asta Funding Inc. | 8.870 | 8.640 | 8.800 | 27,600 | 0.080 |  | 0.90 | 6 |
| ASGN | On Assignment Inc. | 16.82 | 16.27 | 16.50 | 177,500 | 0.27 |  | 1.66 | 3 |
| ASIA | AsiaInfo Holdings Inc. | 11.79 | 11.53 | 11.58 | 90,500 | 0.02 |  | 0.17 | 4 |
| ASMI | ASM International N.V. | 38.59 | 37.91 | 38.07 | 78,600 | 2.19 |  | 6.10 | 5 |
| ASML | ASML Holding N.V. | 47.31 | 46.28 | 46.32 | 2,274,700 | 1.15 |  | 2.42 | 4 |
| ASNA | The Dress Barn Inc. | 19.93 | 19.43 | 19.47 | 1,372,600 | 0.11 |  | 0.56 | 5 |
| ASPS | ALTISOURCE PORTFOLIO SOLUTIO | 56.84 | 55.08 | 55.33 | 70,400 | 1.53 |  | 2.69 | 4 |
| ASRV | AmeriServ Financial Inc. | 3.000 | 2.870 | 2.870 | 12,200 | 0.180 |  | 5.90 | 5 |
| ASRVP | AmeriServ Financial Inc. | 26.26 | 26.26 | 26.26 | 100 | 0.01 |  | 0.04 | 6 |
| ASTC | ASTROTECH CORPORATION | 1.260 | 1.170 | 1.240 | 55,500 | 0.020 |  | 1.59 | 6 |
| ASTE | Astec Industries Inc. | 30.25 | 28.73 | 28.91 | 132,800 | 1.09 |  | 3.63 | 4 |
| ASTI | Ascent Solar Technologies Inc. | 0.6000 | 0.5500 | 0.5600 | 18,900 | 0.0300 |  | 5.08 | 4 |
| ASTM | Aastrom Biosciences Inc. | 2.430 | 2.210 | 2.250 | 298,900 | 0.070 |  | 3.02 | 4 |
| ASUR | Forgent Networks Inc | 5.090 | 4.900 | 4.980 | 2,900 | 0.110 |  | 2.16 | 4 |
| ASYS | Amtech Systems Inc. | 4.860 | 4.600 | 4.600 | 168,100 | 0.190 |  | 3.97 | 5 |
| ATAI | ATA Inc. | 6.750 | 6.750 | 6.750 | 6,400 | 0.000 |  | 0.00 | 6 |
| ATAX | America First Tax Exempt Investors L.P. | 5.830 | 5.730 | 5.730 | 62,100 | 0.080 |  | 1.38 | 6 |
| ATEA | Astea International Inc. | 2.710 | 2.450 | 2.650 | 17,100 | 0.150 |  | 5.36 | 5 |
| ATEC | Alphatec Holdings Inc. | 1.900 | 1.770 | 1.770 | 189,200 | 0.000 |  | 0.00 | 4 |
| ATHN | athenahealth Inc. | 77.18 | 73.29 | 73.52 | 493,100 | 2.08 |  | 2.75 | 6 |
| ATHX | Athersys Inc. | 1.480 | 1.420 | 1.420 | 33,400 | 0.040 |  | 2.74 | 6 |
| ATLO | Ames National Corporation | 20.74 | 20.05 | 20.05 | 3,300 | 0.15 |  | 0.74 | 5 |
| ATMI | ATMI Inc. | 20.10 | 19.56 | 19.57 | 94,600 | 0.35 |  | 1.76 | 4 |
| ATML | Atmel Corporation | 7.650 | 7.360 | 7.370 | 6,018,800 | 0.170 |  | 2.25 | 4 |
| ATNI | Atlantic Tele-Network Inc. | 35.35 | 34.47 | 34.48 | 42,700 | 0.45 |  | 1.29 | 5 |
| ATPG | ATP Oil & Gas Corporation | 6.300 | 5.710 | 5.750 | 1,543,500 | 0.100 |  | 1.71 | 3 |
| ATRC | AtriCure Inc. | 8.300 | 8.070 | 8.220 | 42,300 | 0.180 |  | 2.24 | 4 |
| ATRI | ATRION Corporation | 230.31 | 227.21 | 229.76 | 4,000 | 0.93 |  | 0.40 | 6 |
| ATRM | Aetrium Incorporated | 0.6000 | 0.5800 | 0.5900 | 7,600 | 0.0200 |  | 3.28 | 4 |
| ATRO | Astronics Corporation | 28.74 | 27.90 | 28.04 | 35,600 | 0.41 |  | 1.44 | 3 |
| ATSG | Air Transport Services Group Inc | 5.790 | 5.510 | 5.520 | 285,800 | 0.270 |  | 4.66 | 7 |
| ATVI | Activision Blizzard Inc | 12.81 | 12.34 | 12.38 | 12,174,400 | 0.40 |  | 3.13 | 7 |
| ATX | CROSS A T CO | 10.51 | 10.29 | 10.29 | 8,300 | 0.11 |  | 1.06 | 4 |
| AUBN | Auburn National Bancorporation Inc. | 23.96 | 23.27 | 23.96 | 1,000 | 0.41 |  | 1.74 | 6 |
| AUDC | AudioCodes Ltd. | 2.110 | 1.980 | 2.000 | 77,200 | 0.120 |  | 5.66 | 4 |
| AUTH | AuthenTec Inc. | 3.860 | 3.660 | 3.700 | 106,300 | 0.070 |  | 1.86 | 6 |
| AUXL | Auxilium Pharmaceuticals Inc. | 18.59 | 18.27 | 18.48 | 281,000 | 0.05 |  | 0.27 | 6 |
| AVAV | AeroVironment Inc. | 24.08 | 22.90 | 23.05 | 212,600 | 0.59 |  | 2.50 | 5 |
| AVCA | Advocat Inc. | 6.550 | 6.300 | 6.370 | 10,800 | 0.110 |  | 1.76 | 5 |
| AVEO | AVEO PHARMACEUTICALS INC. | 12.72 | 12.32 | 12.59 | 857,800 | 0.11 |  | 0.87 | 8 |
| AVGO | AVAGO TECHNOLOGIES | 31.66 | 30.71 | 30.77 | 1,945,100 | 0.28 |  | 0.90 | 3 |
| AVID | Avid Technology Inc. | 7.360 | 7.030 | 7.050 | 167,400 | 0.170 |  | 2.35 | 3 |
| AVII | AVI BioPharma Inc. | 0.7800 | 0.7100 | 0.7200 | 538,600 | 0.0300 |  | 4.00 | 4 |
| AVNR | Avanir Pharmaceuticals | 2.960 | 2.860 | 2.860 | 671,300 | 0.030 |  | 1.04 | 6 |
| AVNW | AVIAT NETWORKS INC | 2.640 | 2.560 | 2.580 | 85,700 | 0.040 |  | 1.53 | 5 |
| AWRE | Aware Inc. | 5.600 | 5.450 | 5.600 | 36,100 | 0.150 |  | 2.75 | 6 |
| AXAS | Abraxas Petroleum Corporation | 2.730 | 2.500 | 2.510 | 887,000 | 0.100 |  | 3.83 | 4 |
| AXFN | ISHARES TRUST | 20.75 | 20.74 | 20.75 | 1,200 | 0.25 |  | 1.19 | 4 |
| AXTI | AXT Inc | 3.980 | 3.870 | 3.880 | 156,100 | 0.020 |  | 0.51 | 3 |
| AZPN | Aspen Technology, Inc. | 22.18 | 21.66 | 21.85 | 371,200 | 0.27 |  | 1.22 | 6 |