| Code | Name | High | Low | Close | Volume | Change | |
| AACC | Asset Acceptance Capital Corp. | 6.530 | 6.500 | 6.510 | 84,800 | 0.010 |  | 0.15 | 5 |
| AAME | Atlantic American Corporation | 3.960 | 3.890 | 3.920 | 7,400 | 0.010 |  | 0.26 | 5 |
| AAON | AAON Inc. | 33.23 | 32.63 | 32.64 | 41,000 | 0.31 |  | 0.94 | 5 |
| AAPL | Apple Inc. | 431.66 | 423.00 | 423.00 | 11,089,500 | 8.77 |  | 2.03 | 4 |
| AAWW | Atlas Air Worldwide Holdings | 46.94 | 46.06 | 46.17 | 152,700 | 0.52 |  | 1.11 | 5 |
| AAXJ | iShares Trust | 56.12 | 54.94 | 54.99 | 517,200 | 1.41 |  | 2.50 | 4 |
| ABAX | ABAXIS Inc. | 46.96 | 45.59 | 45.89 | 96,100 | 1.00 |  | 2.13 | 8 |
| ABCB | Ameris Bancorp | 16.42 | 16.14 | 16.17 | 11,200 | 0.28 |  | 1.70 | 5 |
| ABCD | CAMBIUM LEARNING GROUP INC. | 1.280 | 1.280 | 1.280 | 900 | 0.000 |  | 0.00 | 5 |
| ABCO | Advisory Board Company (The) | 54.90 | 53.82 | 53.83 | 132,400 | 0.75 |  | 1.37 | 7 |
| ABFS | Arkansas Best Corporation | 19.85 | 19.36 | 19.64 | 266,800 | 0.00 |  | 0.00 | 7 |
| ABIO | ARCA BIOPHARMA INC. | 1.370 | 1.300 | 1.320 | 202,600 | 0.040 |  | 2.94 | 3 |
| ABMD | ABIOMED Inc. | 22.47 | 21.85 | 22.07 | 350,800 | 0.07 |  | 0.32 | 6 |
| ABTL | Autobytel Inc. | 4.760 | 4.670 | 4.760 | 10,200 | 0.010 |  | 0.21 | 4 |
| ACAD | ACADIA Pharmaceuticals Inc. | 18.62 | 17.75 | 18.09 | 2,577,400 | 0.34 |  | 1.84 | 7 |
| ACAS | American Capital Ltd. | 13.23 | 12.89 | 12.89 | 2,807,000 | 0.32 |  | 2.42 | 5 |
| ACAT | Arctic Cat Inc. | 48.68 | 47.29 | 48.28 | 111,300 | 0.82 |  | 1.73 | 6 |
| ACCL | Accelrys Inc. | 8.280 | 8.090 | 8.250 | 197,800 | 0.160 |  | 1.98 | 4 |
| ACET | Aceto Corporation | 13.10 | 12.80 | 12.87 | 107,700 | 0.19 |  | 1.45 | 5 |
| ACFC | Atlantic Coast Federal Corporation | 4.900 | 4.900 | 4.900 | 1,200 | 0.030 |  | 0.62 | 4 |
| ACFN | Acorn Energy Inc. | 8.750 | 8.500 | 8.570 | 60,900 | 0.040 |  | 0.46 | 5 |
| ACGL | Arch Capital Group Ltd. | 52.77 | 51.25 | 51.26 | 652,300 | 1.42 |  | 2.70 | 6 |
| ACHN | Achillion Pharmaceuticals Inc. | 8.250 | 7.860 | 8.130 | 744,300 | 0.120 |  | 1.50 | 5 |
| ACIW | ACI Worldwide Inc. | 45.52 | 44.80 | 44.92 | 269,600 | 0.12 |  | 0.27 | 5 |
| ACLS | Axcelis Technologies Inc. | 1.800 | 1.750 | 1.760 | 223,100 | 0.030 |  | 1.68 | 6 |
| ACNB | Acnb Corp | 16.40 | 16.30 | 16.30 | 2,700 | 0.00 |  | 0.00 | 4 |
| ACOR | Acorda Therapeutics Inc. | 35.36 | 34.68 | 34.84 | 291,700 | 0.11 |  | 0.31 | 6 |
| ACPW | Active Power Inc. | 4.300 | 4.250 | 4.280 | 8,600 | 0.020 |  | 0.47 | 4 |
| ACRX | Acelrx Pharmaceuticals | 9.680 | 9.220 | 9.340 | 299,200 | 0.260 |  | 2.71 | 6 |
| ACTG | Acacia Research Corporation | 24.92 | 24.19 | 24.31 | 242,900 | 0.29 |  | 1.18 | 6 |
| ACTS | Actions Semiconductor Co. Ltd. | 3.040 | 3.000 | 3.020 | 19,200 | 0.010 |  | 0.33 | 5 |
| ACUR | Acura Pharmaceuticals Inc. | 2.160 | 2.020 | 2.040 | 425,800 | 0.090 |  | 4.23 | 5 |
| ACWI | iShares MSCI ACWI Index Fund | 52.39 | 51.43 | 51.47 | 1,477,000 | 0.89 |  | 1.70 | 6 |
| ACWX | iShares MSCI ACWI ex US Index Fund | 43.12 | 42.22 | 42.24 | 334,800 | 0.87 |  | 2.02 | 5 |
| ACXM | Acxiom Corporation | 22.80 | 22.41 | 22.48 | 283,200 | 0.27 |  | 1.19 | 7 |
| ADAT | Authentidate Holding Corp. | 0.9300 | 0.9000 | 0.9200 | 76,200 | 0.0000 |  | 0.00 | 4 |
| ADBE | Adobe Systems Incorporated | 46.44 | 45.35 | 45.78 | 12,565,000 | 2.42 |  | 5.58 | 7 |
| ADEP | Adept Technology Inc. | 3.700 | 3.560 | 3.660 | 17,700 | 0.020 |  | 0.55 | 4 |
| ADES | ADA-ES Inc. | 39.22 | 38.46 | 38.63 | 46,800 | 0.05 |  | 0.13 | 6 |
| ADP | AUTOMATIC DATA PROCS | 69.98 | 68.92 | 69.04 | 1,904,200 | 0.56 |  | 0.80 | 6 |
| ADRA | BLDRS Asia 50 ADR Index Fund | 27.37 | 27.32 | 27.34 | 1,100 | 0.05 |  | 0.18 | 5 |
| ADRD | BLDRS Developed Markets 100 ADR Index | 22.61 | 22.46 | 22.46 | 2,700 | 0.09 |  | 0.40 | 5 |
| ADRE | BLDRS Emerging Markets 50 ADR Index Fund | 35.50 | 34.62 | 34.64 | 25,800 | 0.91 |  | 2.56 | 4 |
| ADRU | BLDRS Europe 100 ADR Index Fund | 22.08 | 21.92 | 21.95 | 1,400 | 0.11 |  | 0.50 | 6 |
| ADSK | Autodesk Inc. | 36.40 | 35.30 | 35.51 | 3,367,100 | 0.38 |  | 1.08 | 4 |
| ADTN | ADTRAN Inc. | 24.55 | 24.03 | 24.29 | 479,500 | 0.03 |  | 0.12 | 6 |
| ADUS | ADDUS HOMECARE CORPORATION- YAHO | 20.35 | 19.11 | 19.85 | 177,400 | 0.50 |  | 2.46 | 7 |
| ADVS | Advent Software Inc. | 34.50 | 34.09 | 34.09 | 233,500 | 0.13 |  | 0.38 | 6 |
| AEGR | Aegerion Pharmaceuticals Inc. | 64.36 | 62.04 | 62.13 | 355,500 | 1.57 |  | 2.46 | 4 |
| AEHR | Aehr Test Systems | 1.370 | 1.310 | 1.330 | 2,100 | 0.040 |  | 2.92 | 6 |
| AEIS | Advanced Energy Industries Inc. | 18.01 | 17.57 | 17.58 | 111,900 | 0.25 |  | 1.40 | 4 |
| AEPI | AEP Industries Inc. | 71.55 | 69.96 | 70.35 | 45,000 | 0.15 |  | 0.21 | 3 |
| AERL | Asia Entn & Resources Ltd | 3.560 | 3.450 | 3.500 | 339,600 | 0.020 |  | 0.57 | 3 |
| AETI | American Electric Technologies Inc. | 6.740 | 6.650 | 6.740 | 37,300 | 0.130 |  | 1.97 | 6 |
| AEY | ADDvantage Technologies Group Inc. | 2.260 | 2.220 | 2.240 | 16,900 | 0.010 |  | 0.45 | 4 |
| AEZS | AEterna Zentaris Inc. | 1.900 | 1.850 | 1.870 | 172,900 | 0.030 |  | 1.58 | 4 |
| AFAM | Almost Family Inc | 20.31 | 19.50 | 19.65 | 31,700 | 0.29 |  | 1.45 | 5 |
| AFCB | ATHE BANCSHARES CORPORATION | 17.60 | 17.26 | 17.26 | 300 | 0.36 |  | 2.04 | 4 |
| AFCE | AFC Enterprises Inc. | 35.49 | 34.95 | 35.13 | 136,000 | 0.08 |  | 0.23 | 4 |
| AFFX | Affymetrix Inc. | 3.800 | 3.600 | 3.760 | 636,500 | 0.030 |  | 0.80 | 6 |
| AFFY | Affymax Inc. | 1.680 | 1.200 | 1.200 | 16,968,100 | 0.360 |  | 23.08 | 6 |
| AFOP | Alliance Fiber Optic Products Inc. | 24.00 | 22.47 | 23.18 | 109,600 | 0.22 |  | 0.94 | 7 |
| AFSI | AmTrust Financial Services Inc. | 36.64 | 35.94 | 36.05 | 614,600 | 0.43 |  | 1.18 | 8 |
| AGEN | Antigenics Inc. | 4.050 | 3.710 | 3.980 | 373,200 | 0.200 |  | 5.29 | 6 |
| AGII | Argo Group International Holdings Ltd. | 42.75 | 41.83 | 41.88 | 95,100 | 0.98 |  | 2.29 | 7 |
| AGNC | American Capital Agency Corp. | 26.10 | 24.36 | 24.44 | 21,687,900 | 0.90 |  | 3.55 | 5 |
| AGYS | Agilysys Inc. | 13.65 | 13.30 | 13.32 | 27,200 | 0.33 |  | 2.42 | 6 |
| AHGP | Alliance Holdings GP L.P. | 61.29 | 59.38 | 61.29 | 45,600 | 0.92 |  | 1.52 | 3 |
| AHPI | Allied Healthcare Products Inc. | 2.540 | 2.520 | 2.520 | 300 | 0.010 |  | 0.40 | 5 |
| AIMC | Altra Holdings Inc. | 27.19 | 26.64 | 26.73 | 67,900 | 0.49 |  | 1.80 | 4 |
| AINV | Apollo Investment Corporation | 7.970 | 7.770 | 7.800 | 2,220,400 | 0.140 |  | 1.76 | 4 |
| AIRM | Air Methods Corporation | 38.60 | 37.42 | 37.60 | 360,200 | 0.61 |  | 1.60 | 6 |
| AIRT | Air T Inc. | 10.39 | 10.22 | 10.28 | 2,300 | 0.07 |  | 0.68 | 5 |
| AIXG | Aixtron Aktiengesellschaft | 17.67 | 17.08 | 17.12 | 50,800 | 0.31 |  | 1.78 | 5 |
| AKAM | Akamai Technologies Inc. | 43.14 | 42.49 | 42.56 | 1,422,000 | 0.28 |  | 0.65 | 4 |
| AKRX | Akorn Inc. | 13.57 | 13.21 | 13.24 | 455,800 | 0.25 |  | 1.85 | 4 |
| ALCO | Alico Inc. | 44.75 | 43.51 | 44.01 | 9,700 | 0.37 |  | 0.83 | 5 |
| ALGN | Align Technology Inc. | 36.58 | 35.94 | 36.10 | 373,200 | 0.15 |  | 0.41 | 6 |
| ALGT | Allegiant Travel Company | 106.13 | 104.90 | 104.92 | 56,300 | 0.49 |  | 0.46 | 7 |
| ALIM | ALIMERA SCIENCES INC | 5.480 | 5.260 | 5.400 | 98,400 | 0.010 |  | 0.19 | 7 |
| ALKS | Alkermes Inc. | 30.04 | 28.80 | 28.91 | 814,100 | 1.00 |  | 3.34 | 3 |
| ALLB | Alliance Bancorp Inc. of Pennsylvania | 13.59 | 13.59 | 13.59 | 100 | 0.01 |  | 0.07 | 5 |
| ALLT | Allot Communications Ltd. | 12.62 | 12.31 | 12.54 | 304,200 | 0.15 |  | 1.21 | 6 |
| ALNY | Alnylam Pharmaceuticals Inc. | 30.84 | 29.70 | 30.25 | 663,600 | 0.26 |  | 0.87 | 5 |
| ALOG | Analogic Corporation | 75.92 | 74.72 | 74.92 | 28,500 | 0.90 |  | 1.19 | 4 |
| ALOT | Astro-Med Inc. | 10.90 | 10.89 | 10.90 | 8,900 | 0.04 |  | 0.37 | 6 |
| ALSK | Alaska Communications Systems Group Inc. | 1.800 | 1.760 | 1.760 | 136,000 | 0.010 |  | 0.57 | 6 |
| ALTE | Max Capital Group Ltd. | 32.81 | 32.17 | 32.55 | 2,375,100 | 0.35 |  | 1.09 | 5 |
| ALTI | Altair Nanotechnologies Inc. | 2.380 | 2.220 | 2.360 | 19,800 | 0.140 |  | 6.31 | 4 |
| ALTR | Altera Corporation | 33.05 | 32.44 | 32.50 | 2,259,200 | 0.43 |  | 1.31 | 5 |
| ALVR | Alvarion Ltd. | 1.500 | 1.430 | 1.460 | 174,900 | 0.040 |  | 2.82 | 4 |
| ALXA | Alexza Pharmaceuticals Inc. | 4.650 | 4.440 | 4.550 | 125,600 | 0.020 |  | 0.44 | 5 |
| ALXN | Alexion Pharmaceuticals Inc. | 95.85 | 90.86 | 91.09 | 2,793,400 | 1.30 |  | 1.41 | 5 |
| AMAG | AMAG Pharmaceuticals Inc. | 20.84 | 20.40 | 20.65 | 129,600 | 0.08 |  | 0.39 | 6 |
| AMAP | Autonavi Holdings | 12.85 | 12.64 | 12.67 | 449,600 | 0.12 |  | 0.94 | 6 |
| AMAT | Applied Materials Inc. | 16.05 | 15.66 | 15.70 | 19,499,700 | 0.27 |  | 1.69 | 7 |
| AMCC | Applied Micro Circuits Corporation | 9.980 | 9.190 | 9.610 | 2,847,200 | 0.110 |  | 1.13 | 8 |
| AMCF | ANDATEE CHINA MARINE FUEL SERVI | 0.5700 | 0.5100 | 0.5600 | 4,300 | 0.0500 |  | 9.80 | 4 |
| AMCN | AirMedia Group Inc | 1.850 | 1.800 | 1.850 | 49,200 | 0.010 |  | 0.54 | 6 |
| AMED | Amedisys Inc | 13.61 | 13.10 | 13.20 | 341,300 | 0.40 |  | 2.94 | 6 |
| AMGN | Amgen Inc. | 102.00 | 99.15 | 99.18 | 3,825,400 | 2.32 |  | 2.29 | 5 |
| AMIC | American Independence Corp. | 7.240 | 7.230 | 7.240 | 200 | 0.240 |  | 3.43 | 5 |
| AMKR | Amkor Technology Inc. | 4.470 | 4.300 | 4.300 | 1,005,400 | 0.110 |  | 2.49 | 5 |
| AMNB | American National Bankshares Inc. | 23.08 | 22.77 | 23.08 | 27,700 | 0.09 |  | 0.39 | 8 |
| AMOT | Allied Motion Technologies Inc. | 6.940 | 6.820 | 6.940 | 2,400 | 0.050 |  | 0.72 | 6 |
| AMOV | America Movil S.A.B. de C.V. | 20.05 | 19.74 | 19.74 | 1,300 | 0.35 |  | 1.74 | 5 |
| AMRB | American River Bankshares | 8.800 | 8.200 | 8.350 | 1,600 | 0.100 |  | 1.18 | 5 |
| AMRI | Albany Molecular Research Inc. | 12.01 | 11.64 | 11.76 | 225,900 | 0.21 |  | 1.75 | 6 |
| AMRN | Amarin Corporation PLC | 6.700 | 6.450 | 6.470 | 3,651,800 | 0.130 |  | 1.97 | 5 |
| AMRS | Amyris Inc. | 2.770 | 2.650 | 2.660 | 82,400 | 0.040 |  | 1.48 | 4 |
| AMSC | American Superconductor Corporation | 2.310 | 2.120 | 2.260 | 614,600 | 0.100 |  | 4.63 | 4 |
| AMSF | AMERISAFE Inc. | 33.59 | 33.14 | 33.16 | 70,900 | 0.48 |  | 1.43 | 4 |
| AMSG | Amsurg Corp. | 36.72 | 35.79 | 35.80 | 48,900 | 0.94 |  | 2.56 | 6 |
| AMSWA | American Software Inc. | 8.500 | 8.350 | 8.420 | 22,200 | 0.020 |  | 0.24 | 5 |
| AMWD | American Woodmark Corporation | 36.49 | 35.66 | 35.70 | 98,500 | 0.50 |  | 1.38 | 5 |
| AMZN | Amazon.com Inc. | 283.34 | 277.87 | 278.16 | 2,825,900 | 3.60 |  | 1.28 | 7 |
| ANAC | Anacor Pharmaceuticals Inc. | 5.420 | 5.110 | 5.180 | 349,700 | 0.020 |  | 0.38 | 5 |
| ANAD | ANADIGICS Inc. | 2.220 | 2.140 | 2.170 | 336,700 | 0.050 |  | 2.25 | 6 |
| ANAT | American National Insurance Company | 99.41 | 98.00 | 98.11 | 61,500 | 0.87 |  | 0.88 | 6 |
| ANCB | Anchor Bancorp | 17.57 | 17.57 | 17.57 | 100 | 0.22 |  | 1.27 | 5 |
| ANCI | AMERICAN CARESOURCE | 1.910 | 1.830 | 1.830 | 700 | 0.120 |  | 6.15 | 6 |
| ANCX | Access National Corporation | 13.11 | 12.54 | 12.67 | 49,100 | 0.33 |  | 2.54 | 6 |
| ANDE | Andersons Inc. (The) | 54.13 | 53.09 | 53.47 | 97,800 | 0.53 |  | 0.98 | 6 |
| ANEN | Anaren Inc. | 24.10 | 23.63 | 23.68 | 22,200 | 0.30 |  | 1.25 | 5 |
| ANGO | AngioDynamics Inc. | 11.21 | 11.03 | 11.05 | 17,100 | 0.13 |  | 1.16 | 6 |
| ANIK | Anika Therapeutics Inc. | 18.07 | 17.00 | 17.54 | 168,000 | 0.01 |  | 0.06 | 8 |
| ANLY | Analysts International Corporation | 4.160 | 4.010 | 4.160 | 20,400 | 0.000 |  | 0.00 | 6 |
| ANNB | Annapolis Bancorp Inc. | 13.51 | 13.22 | 13.51 | 11,100 | 0.21 |  | 1.58 | 7 |
| ANSS | AYS Inc. | 76.80 | 75.12 | 75.17 | 236,600 | 1.34 |  | 1.75 | 7 |
| ANTH | ANTHERA PHARMACEUTICALS INC. | 0.5800 | 0.5600 | 0.5600 | 119,700 | 0.0200 |  | 3.45 | 5 |
| ANTP | PHAZAR CORP | 1.210 | 1.160 | 1.200 | 36,900 | 0.010 |  | 0.84 | 5 |
| AOSL | ALPHA & OMEGA SEMICONDUCOR LTD. | 7.720 | 7.430 | 7.470 | 52,000 | 0.280 |  | 3.61 | 5 |
| APAGF | APCO Argentina Inc. | 13.50 | 12.67 | 13.19 | 125,800 | 0.41 |  | 3.01 | 7 |
| APEI | American Public Education Inc. | 38.84 | 37.76 | 37.95 | 112,700 | 0.81 |  | 2.09 | 5 |
| APFC | American Pacific Corporation | 27.87 | 27.30 | 27.40 | 15,700 | 0.30 |  | 1.08 | 6 |
| APKT | Acme Packet Inc. | 29.25 | 29.22 | 29.24 | 1,921,700 | 0.02 |  | 0.07 | 6 |
| APOG | Apogee Enterprises Inc. | 25.36 | 24.69 | 24.73 | 182,900 | 0.36 |  | 1.43 | 4 |
| APOL | Apollo Group Inc. | 20.59 | 19.87 | 19.88 | 1,341,700 | 0.32 |  | 1.58 | 5 |
| APPY | AspenBio Pharma Inc. | 1.320 | 1.270 | 1.310 | 618,000 | 0.010 |  | 0.76 | 5 |
| APRI | Nexmed Inc. | 2.590 | 2.500 | 2.510 | 327,800 | 0.060 |  | 2.33 | 4 |
| APSA | Alto Palermo S.A. | 16.25 | 16.24 | 16.25 | 1,100 | 0.30 |  | 1.88 | 5 |
| ARAY | Accuray Incorporated | 5.930 | 5.800 | 5.810 | 415,900 | 0.090 |  | 1.53 | 6 |
| ARCC | Ares Capital Corporation | 16.99 | 16.68 | 16.70 | 2,166,300 | 0.29 |  | 1.71 | 5 |
| ARCI | Appliance Recycling Centers of America | 2.170 | 2.150 | 2.170 | 21,700 | 0.020 |  | 0.93 | 5 |
| ARCW | Arc Wireless Solutions Inc. | 5.320 | 5.210 | 5.300 | 700 | 0.140 |  | 2.57 | 6 |
| ARDNA | Arden Group Inc. | 110.00 | 107.35 | 107.35 | 1,200 | 2.86 |  | 2.60 | 6 |
| AREX | Approach Resources Inc. | 25.70 | 24.91 | 25.39 | 329,600 | 0.42 |  | 1.68 | 4 |
| ARIA | ARIAD Pharmaceuticals Inc. | 18.02 | 17.20 | 17.22 | 1,459,700 | 0.56 |  | 3.15 | 4 |
| ARII | American Railcar Industries Inc. | 33.78 | 33.06 | 33.08 | 193,500 | 0.70 |  | 2.07 | 4 |
| ARKR | Ark Restaurants Corp. | 21.87 | 21.87 | 21.87 | 100 | 0.10 |  | 0.46 | 6 |
| ARLP | Alliance Resource Partners L.P. | 72.46 | 70.80 | 71.58 | 35,900 | 0.12 |  | 0.17 | 4 |
| ARMH | ARM Holdings plc | 39.65 | 36.96 | 37.17 | 3,996,000 | 2.35 |  | 5.95 | 4 |
| ARNA | Arena Pharmaceuticals Inc. | 7.830 | 7.500 | 7.610 | 7,066,100 | 0.100 |  | 1.33 | 4 |
| AROW | Arrow Financial Corporation | 24.94 | 24.66 | 24.73 | 5,800 | 0.06 |  | 0.24 | 4 |
| ARQL | ArQule Inc. | 2.440 | 2.360 | 2.360 | 132,600 | 0.070 |  | 2.88 | 4 |
| ARRS | Arris Group Inc | 14.98 | 14.71 | 14.74 | 1,201,200 | 0.15 |  | 1.01 | 5 |
| ARRY | Array BioPharma Inc. | 5.040 | 4.860 | 4.900 | 1,019,900 | 0.060 |  | 1.21 | 4 |
| ARTC | ArthroCare Corporation | 36.45 | 35.55 | 35.56 | 82,600 | 0.63 |  | 1.74 | 7 |
| ARTNA | Artesian Resources Corporation | 22.19 | 21.82 | 22.01 | 11,700 | 0.01 |  | 0.05 | 5 |
| ARTW | Art's-Way Manufacturing Co. Inc. | 7.650 | 7.530 | 7.530 | 4,000 | 0.030 |  | 0.40 | 5 |
| ARTX | Arotech Corporation | 1.700 | 1.570 | 1.570 | 89,800 | 0.030 |  | 1.88 | 6 |
| ARUN | Aruba Networks Inc. | 15.02 | 14.69 | 14.79 | 1,920,200 | 0.07 |  | 0.48 | 4 |
| ARWR | Arrowhead Research Corporation | 2.010 | 1.950 | 2.000 | 61,900 | 0.010 |  | 0.50 | 4 |
| ASBC | Associated Banc-Corp | 15.28 | 15.01 | 15.11 | 933,800 | 0.18 |  | 1.18 | 5 |
| ASBI | Ameriana Bancorp | 10.000 | 10.000 | 10.000 | 200 | 0.000 |  | 0.00 | 5 |
| ASCA | Ameristar Casinos Inc. | 26.41 | 26.33 | 26.33 | 297,000 | 0.03 |  | 0.11 | 6 |
| ASCMA | ASCENT MEDIA CORP | 74.73 | 73.87 | 73.92 | 20,500 | 0.77 |  | 1.03 | 5 |
| ASEI | American Science and Engineering Inc. | 59.42 | 58.20 | 58.75 | 43,600 | 0.66 |  | 1.11 | 5 |
| ASFI | Asta Funding Inc. | 8.780 | 8.750 | 8.750 | 8,000 | 0.010 |  | 0.11 | 4 |
| ASIA | AsiaInfo Holdings Inc. | 11.63 | 11.59 | 11.59 | 166,500 | 0.02 |  | 0.17 | 6 |
| ASMI | ASM International N.V. | 35.79 | 35.35 | 35.44 | 2,600 | 0.19 |  | 0.53 | 5 |
| ASML | ASML Holding N.V. | 81.83 | 80.04 | 80.08 | 724,500 | 0.27 |  | 0.34 | 5 |
| ASNA | The Dress Barn Inc. | 17.79 | 17.55 | 17.62 | 1,719,900 | 0.07 |  | 0.40 | 3 |
| ASPS | ALTISOURCE PORTFOLIO SOLUTIO | 101.90 | 99.23 | 99.65 | 126,900 | 0.50 |  | 0.50 | 7 |
| ASRV | AmeriServ Financial Inc. | 3.090 | 3.040 | 3.040 | 4,400 | 0.020 |  | 0.65 | 4 |
| ASRVP | AmeriServ Financial Inc. | 26.50 | 26.43 | 26.43 | 2,800 | 0.43 |  | 1.65 | 5 |
| ASTC | ASTROTECH CORPORATION | 0.7600 | 0.7300 | 0.7500 | 9,400 | 0.0100 |  | 1.32 | 6 |
| ASTE | Astec Industries Inc. | 35.44 | 34.62 | 34.63 | 33,400 | 0.26 |  | 0.75 | 5 |
| ASTI | Ascent Solar Technologies Inc. | 0.7900 | 0.7100 | 0.7400 | 343,000 | 0.0400 |  | 5.13 | 5 |
| ASTM | Aastrom Biosciences Inc. | 0.5100 | 0.4900 | 0.5000 | 206,000 | 0.0100 |  | 1.96 | 5 |
| ASUR | Forgent Networks Inc | 5.890 | 5.890 | 5.890 | 100 | 0.090 |  | 1.55 | 4 |
| ASYS | Amtech Systems Inc. | 5.820 | 5.200 | 5.670 | 120,200 | 0.690 |  | 13.86 | 6 |
| ATAI | ATA Inc. | 4.250 | 4.250 | 4.250 | 100 | 0.100 |  | 2.41 | 4 |
| ATAX | America First Tax Exempt Investors L.P. | 6.920 | 6.800 | 6.830 | 71,100 | 0.030 |  | 0.44 | 6 |
| ATEA | Astea International Inc. | 2.190 | 2.100 | 2.110 | 4,500 | 0.010 |  | 0.47 | 4 |
| ATEC | Alphatec Holdings Inc. | 2.100 | 2.040 | 2.070 | 87,700 | 0.020 |  | 0.96 | 6 |
| ATHN | athenahealth Inc. | 91.64 | 90.43 | 90.50 | 216,800 | 0.47 |  | 0.52 | 8 |
| ATHX | Athersys Inc. | 1.730 | 1.630 | 1.660 | 256,400 | 0.050 |  | 2.92 | 5 |
| ATLO | Ames National Corporation | 22.75 | 22.29 | 22.50 | 7,700 | 0.18 |  | 0.79 | 7 |
| ATMI | ATMI Inc. | 24.53 | 24.10 | 24.13 | 93,700 | 0.45 |  | 1.83 | 7 |
| ATML | Atmel Corporation | 7.950 | 7.680 | 7.710 | 6,195,700 | 0.200 |  | 2.53 | 5 |
| ATNI | Atlantic Tele-Network Inc. | 51.19 | 49.83 | 50.72 | 19,700 | 0.01 |  | 0.02 | 5 |
| ATRC | AtriCure Inc. | 9.140 | 8.860 | 9.000 | 85,000 | 0.120 |  | 1.32 | 5 |
| ATRI | ATRION Corporation | 222.14 | 219.34 | 221.06 | 2,300 | 0.90 |  | 0.41 | 6 |
| ATRM | Aetrium Incorporated | 0.5400 | 0.5000 | 0.5400 | 37,700 | 0.0000 |  | 0.00 | 5 |
| ATRO | Astronics Corporation | 41.30 | 40.39 | 40.66 | 77,500 | 0.39 |  | 0.95 | 7 |
| ATSG | Air Transport Services Group Inc | 6.680 | 6.460 | 6.490 | 80,900 | 0.170 |  | 2.55 | 6 |
| ATTU | Attunity Ltd. | 5.710 | 5.510 | 5.550 | 17,700 | 0.150 |  | 2.63 | 5 |
| ATVI | Activision Blizzard Inc | 14.65 | 14.21 | 14.23 | 9,703,000 | 0.36 |  | 2.47 | 5 |
| ATX | CROSS A T CO | 16.50 | 15.94 | 16.05 | 35,400 | 0.10 |  | 0.62 | 8 |
| AUBN | Auburn National Bancorporation Inc. | 21.98 | 21.73 | 21.98 | 400 | 0.26 |  | 1.20 | 5 |
| AUDC | AudioCodes Ltd. | 4.600 | 4.460 | 4.460 | 67,400 | 0.100 |  | 2.19 | 6 |
| AUXL | Auxilium Pharmaceuticals Inc. | 17.37 | 16.95 | 16.96 | 412,800 | 0.38 |  | 2.19 | 6 |
| AVAV | AeroVironment Inc. | 19.85 | 19.58 | 19.67 | 163,000 | 0.08 |  | 0.41 | 5 |
| AVEO | AVEO PHARMACEUTICALS INC. | 2.660 | 2.510 | 2.550 | 490,600 | 0.070 |  | 2.67 | 5 |
| AVGO | AVAGO TECHNOLOGIES | 38.87 | 38.07 | 38.07 | 2,403,400 | 0.68 |  | 1.75 | 7 |
| AVID | Avid Technology Inc. | 6.430 | 6.280 | 6.320 | 25,400 | 0.090 |  | 1.40 | 5 |
| AVNR | Avanir Pharmaceuticals | 4.730 | 4.420 | 4.430 | 2,021,700 | 0.180 |  | 3.90 | 7 |
| AVNW | AVIAT NETWORKS INC | 2.900 | 2.780 | 2.820 | 140,800 | 0.000 |  | 0.00 | 6 |
| AWRE | Aware Inc. | 5.170 | 5.060 | 5.120 | 34,600 | 0.040 |  | 0.79 | 4 |
| AXAS | Abraxas Petroleum Corporation | 2.320 | 2.240 | 2.280 | 1,037,300 | 0.040 |  | 1.79 | 6 |
| AXFN | ISHARES TRUST | 24.01 | 24.00 | 24.00 | 3,000 | 0.12 |  | 0.50 | 4 |
| AXTI | AXT Inc | 2.770 | 2.710 | 2.740 | 52,700 | 0.030 |  | 1.08 | 4 |
| AZPN | Aspen Technology, Inc. | 30.10 | 29.60 | 29.79 | 473,300 | 0.06 |  | 0.20 | 5 |