| 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 | 3.930 | 3.900 | 3.910 | 2,400 | 0.050 |  | 1.26 | 7 |
| AAON | AAON Inc. | 33.26 | 32.18 | 32.95 | 47,200 | 0.72 |  | 2.23 | 4 |
| AAPL | Apple Inc. | 434.90 | 430.21 | 431.77 | 6,970,000 | 0.23 |  | 0.05 | 4 |
| AAWW | Atlas Air Worldwide Holdings | 47.23 | 45.52 | 46.69 | 155,200 | 0.56 |  | 1.21 | 5 |
| AAXJ | iShares Trust | 56.42 | 56.17 | 56.40 | 3,658,900 | 0.02 |  | 0.04 | 4 |
| ABAX | ABAXIS Inc. | 46.97 | 46.43 | 46.89 | 65,800 | 0.24 |  | 0.51 | 7 |
| ABCB | Ameris Bancorp | 16.47 | 16.24 | 16.45 | 26,100 | 0.18 |  | 1.11 | 4 |
| ABCD | CAMBIUM LEARNING GROUP INC. | 1.330 | 1.270 | 1.280 | 2,100 | 0.060 |  | 4.48 | 6 |
| ABCO | Advisory Board Company (The) | 54.93 | 53.76 | 54.58 | 102,700 | 0.63 |  | 1.17 | 7 |
| ABFS | Arkansas Best Corporation | 19.95 | 19.36 | 19.64 | 392,400 | 0.23 |  | 1.18 | 7 |
| ABIO | ARCA BIOPHARMA INC. | 1.380 | 1.310 | 1.360 | 426,400 | 0.020 |  | 1.45 | 3 |
| ABMD | ABIOMED Inc. | 22.06 | 21.71 | 22.00 | 309,500 | 0.26 |  | 1.20 | 6 |
| ABTL | Autobytel Inc. | 4.750 | 4.660 | 4.750 | 6,800 | 0.010 |  | 0.21 | 5 |
| ACAD | ACADIA Pharmaceuticals Inc. | 19.25 | 18.32 | 18.43 | 3,492,000 | 0.49 |  | 2.59 | 7 |
| ACAS | American Capital Ltd. | 13.26 | 12.84 | 13.21 | 4,755,900 | 0.05 |  | 0.38 | 5 |
| ACAT | Arctic Cat Inc. | 47.77 | 46.66 | 47.46 | 181,800 | 0.90 |  | 1.93 | 4 |
| ACCL | Accelrys Inc. | 8.180 | 8.050 | 8.090 | 163,900 | 0.050 |  | 0.61 | 4 |
| ACET | Aceto Corporation | 13.07 | 12.73 | 13.06 | 118,600 | 0.31 |  | 2.43 | 5 |
| ACFC | Atlantic Coast Federal Corporation | 4.870 | 4.870 | 4.870 | 100 | 0.180 |  | 3.56 | 5 |
| ACFN | Acorn Energy Inc. | 8.740 | 8.380 | 8.610 | 85,300 | 0.250 |  | 2.99 | 5 |
| ACGL | Arch Capital Group Ltd. | 52.89 | 52.00 | 52.68 | 298,500 | 0.44 |  | 0.84 | 5 |
| ACHN | Achillion Pharmaceuticals Inc. | 8.110 | 7.930 | 8.010 | 952,700 | 0.080 |  | 1.01 | 5 |
| ACIW | ACI Worldwide Inc. | 44.97 | 44.10 | 44.80 | 134,800 | 0.66 |  | 1.50 | 5 |
| ACLS | Axcelis Technologies Inc. | 1.790 | 1.710 | 1.790 | 597,400 | 0.060 |  | 3.47 | 5 |
| ACNB | Acnb Corp | 16.49 | 16.30 | 16.30 | 3,500 | 0.19 |  | 1.15 | 5 |
| ACOR | Acorda Therapeutics Inc. | 35.13 | 33.92 | 34.95 | 250,800 | 0.73 |  | 2.13 | 6 |
| ACPW | Active Power Inc. | 4.390 | 4.250 | 4.260 | 263,300 | 0.000 |  | 0.00 | 5 |
| ACRX | Acelrx Pharmaceuticals | 10.130 | 9.400 | 9.600 | 353,300 | 0.320 |  | 3.23 | 7 |
| ACTG | Acacia Research Corporation | 24.80 | 24.40 | 24.60 | 201,500 | 0.03 |  | 0.12 | 6 |
| ACTS | Actions Semiconductor Co. Ltd. | 3.030 | 3.020 | 3.030 | 96,100 | 0.000 |  | 0.00 | 5 |
| ACUR | Acura Pharmaceuticals Inc. | 2.180 | 2.120 | 2.130 | 232,000 | 0.010 |  | 0.47 | 4 |
| ACWI | iShares MSCI ACWI Index Fund | 52.43 | 52.09 | 52.36 | 794,300 | 0.34 |  | 0.65 | 5 |
| ACWX | iShares MSCI ACWI ex US Index Fund | 43.22 | 42.99 | 43.11 | 510,200 | 0.15 |  | 0.35 | 5 |
| ACXM | Acxiom Corporation | 22.93 | 22.72 | 22.75 | 347,800 | 0.01 |  | 0.04 | 7 |
| ADAT | Authentidate Holding Corp. | 0.9500 | 0.9100 | 0.9200 | 90,000 | 0.0200 |  | 2.13 | 5 |
| ADBE | Adobe Systems Incorporated | 44.20 | 43.22 | 43.36 | 5,433,700 | 0.03 |  | 0.07 | 5 |
| ADEP | Adept Technology Inc. | 3.650 | 3.530 | 3.640 | 43,700 | 0.070 |  | 1.96 | 5 |
| ADES | ADA-ES Inc. | 39.33 | 38.22 | 38.68 | 69,700 | 0.68 |  | 1.79 | 6 |
| ADP | AUTOMATIC DATA PROCS | 69.68 | 68.61 | 69.60 | 1,280,100 | 0.90 |  | 1.31 | 5 |
| ADRA | BLDRS Asia 50 ADR Index Fund | 27.46 | 27.29 | 27.29 | 2,100 | 0.02 |  | 0.07 | 4 |
| ADRD | BLDRS Developed Markets 100 ADR Index | 22.66 | 22.40 | 22.55 | 2,400 | 0.11 |  | 0.49 | 5 |
| ADRE | BLDRS Emerging Markets 50 ADR Index Fund | 35.67 | 35.41 | 35.55 | 64,400 | 0.08 |  | 0.22 | 4 |
| ADRU | BLDRS Europe 100 ADR Index Fund | 22.16 | 22.04 | 22.06 | 1,900 | 0.07 |  | 0.32 | 5 |
| ADSK | Autodesk Inc. | 35.52 | 35.12 | 35.13 | 1,887,200 | 0.30 |  | 0.85 | 4 |
| ADTN | ADTRAN Inc. | 24.45 | 23.53 | 24.32 | 420,200 | 0.58 |  | 2.44 | 6 |
| ADUS | ADDUS HOMECARE CORPORATION- YAHO | 20.40 | 19.45 | 20.35 | 148,600 | 0.72 |  | 3.67 | 7 |
| ADVS | Advent Software Inc. | 34.28 | 33.76 | 34.22 | 284,100 | 0.38 |  | 1.12 | 7 |
| AEGR | Aegerion Pharmaceuticals Inc. | 64.69 | 60.71 | 63.70 | 934,200 | 1.36 |  | 2.18 | 6 |
| AEHR | Aehr Test Systems | 1.370 | 1.310 | 1.330 | 2,100 | 0.040 |  | 2.92 | 6 |
| AEIS | Advanced Energy Industries Inc. | 17.90 | 17.40 | 17.83 | 137,200 | 0.50 |  | 2.89 | 4 |
| AEPI | AEP Industries Inc. | 70.95 | 69.13 | 70.50 | 99,700 | 1.05 |  | 1.51 | 3 |
| AERL | Asia Entn & Resources Ltd | 3.600 | 3.510 | 3.520 | 107,100 | 0.030 |  | 0.85 | 4 |
| AETI | American Electric Technologies Inc. | 6.700 | 6.540 | 6.610 | 49,900 | 0.040 |  | 0.60 | 7 |
| AEY | ADDvantage Technologies Group Inc. | 2.230 | 2.220 | 2.230 | 8,500 | 0.010 |  | 0.45 | 4 |
| AEZS | AEterna Zentaris Inc. | 1.900 | 1.860 | 1.900 | 319,600 | 0.010 |  | 0.53 | 4 |
| AFAM | Almost Family Inc | 20.09 | 19.65 | 19.94 | 11,200 | 0.29 |  | 1.48 | 5 |
| AFCB | ATHE BANCSHARES CORPORATION | 17.62 | 17.61 | 17.62 | 200 | 0.03 |  | 0.17 | 4 |
| AFCE | AFC Enterprises Inc. | 35.23 | 34.47 | 35.21 | 133,200 | 0.69 |  | 2.00 | 4 |
| AFFX | Affymetrix Inc. | 3.750 | 3.590 | 3.730 | 1,710,100 | 0.060 |  | 1.63 | 4 |
| AFFY | Affymax Inc. | 1.680 | 1.200 | 1.200 | 16,968,100 | 0.360 |  | 23.08 | 6 |
| AFOP | Alliance Fiber Optic Products Inc. | 24.05 | 23.12 | 23.40 | 225,500 | 0.18 |  | 0.76 | 7 |
| AFSI | AmTrust Financial Services Inc. | 36.86 | 35.66 | 36.48 | 632,700 | 0.87 |  | 2.44 | 6 |
| AGEN | Antigenics Inc. | 4.200 | 3.670 | 3.780 | 738,900 | 0.030 |  | 0.80 | 4 |
| AGII | Argo Group International Holdings Ltd. | 43.87 | 41.31 | 42.86 | 53,400 | 1.42 |  | 3.43 | 6 |
| AGNC | American Capital Agency Corp. | 25.45 | 25.02 | 25.34 | 6,908,700 | 0.01 |  | 0.04 | 4 |
| AGYS | Agilysys Inc. | 13.85 | 13.61 | 13.65 | 31,400 | 0.01 |  | 0.07 | 7 |
| AHGP | Alliance Holdings GP L.P. | 61.14 | 60.21 | 60.37 | 77,100 | 0.39 |  | 0.64 | 4 |
| AHPI | Allied Healthcare Products Inc. | 2.630 | 2.520 | 2.530 | 2,400 | 0.010 |  | 0.39 | 5 |
| AIMC | Altra Holdings Inc. | 27.43 | 27.00 | 27.22 | 102,400 | 0.13 |  | 0.48 | 4 |
| AINV | Apollo Investment Corporation | 7.960 | 7.810 | 7.940 | 2,132,300 | 0.080 |  | 1.00 | 5 |
| AIRM | Air Methods Corporation | 39.29 | 37.76 | 38.21 | 373,800 | 1.13 |  | 2.87 | 7 |
| AIRT | Air T Inc. | 10.39 | 10.15 | 10.35 | 3,100 | 0.30 |  | 2.99 | 5 |
| AIXG | Aixtron Aktiengesellschaft | 17.43 | 17.26 | 17.43 | 72,500 | 0.79 |  | 4.75 | 5 |
| AKAM | Akamai Technologies Inc. | 43.02 | 42.44 | 42.84 | 1,646,900 | 0.10 |  | 0.23 | 4 |
| AKRX | Akorn Inc. | 13.71 | 13.35 | 13.49 | 1,035,900 | 0.03 |  | 0.22 | 4 |
| ALCO | Alico Inc. | 44.89 | 44.11 | 44.38 | 15,800 | 0.08 |  | 0.18 | 6 |
| ALGN | Align Technology Inc. | 36.38 | 35.67 | 36.25 | 316,000 | 0.38 |  | 1.06 | 4 |
| ALGT | Allegiant Travel Company | 105.67 | 101.56 | 105.41 | 70,700 | 3.21 |  | 3.14 | 7 |
| ALIM | ALIMERA SCIENCES INC | 5.550 | 5.290 | 5.390 | 143,200 | 0.010 |  | 0.19 | 7 |
| ALKS | Alkermes Inc. | 30.20 | 28.77 | 29.91 | 1,198,100 | 1.14 |  | 3.96 | 3 |
| ALLB | Alliance Bancorp Inc. of Pennsylvania | 13.66 | 13.59 | 13.60 | 4,100 | 0.01 |  | 0.07 | 6 |
| ALLT | Allot Communications Ltd. | 12.40 | 12.25 | 12.39 | 184,700 | 0.15 |  | 1.23 | 6 |
| ALNY | Alnylam Pharmaceuticals Inc. | 30.19 | 29.59 | 29.99 | 242,400 | 0.30 |  | 1.01 | 5 |
| ALOG | Analogic Corporation | 75.91 | 74.53 | 75.82 | 34,600 | 1.13 |  | 1.51 | 4 |
| ALOT | Astro-Med Inc. | 10.94 | 10.90 | 10.94 | 1,800 | 0.13 |  | 1.20 | 7 |
| ALRN | American Learning Corp New Yor | 0.3200 | 0.3100 | 0.3200 | 15,000 | 0.0300 |  | 8.57 | 5 |
| ALSK | Alaska Communications Systems Group Inc. | 1.780 | 1.740 | 1.750 | 136,700 | 0.000 |  | 0.00 | 5 |
| ALTE | Max Capital Group Ltd. | 32.81 | 32.17 | 32.55 | 2,375,100 | 0.35 |  | 1.09 | 5 |
| ALTI | Altair Nanotechnologies Inc. | 2.300 | 2.200 | 2.220 | 5,600 | 0.090 |  | 3.90 | 5 |
| ALTR | Altera Corporation | 33.15 | 32.83 | 32.93 | 2,374,900 | 0.07 |  | 0.21 | 5 |
| ALVR | Alvarion Ltd. | 1.520 | 1.210 | 1.420 | 320,900 | 0.150 |  | 11.81 | 3 |
| ALXA | Alexza Pharmaceuticals Inc. | 4.630 | 4.500 | 4.530 | 109,100 | 0.060 |  | 1.31 | 5 |
| ALXN | Alexion Pharmaceuticals Inc. | 93.58 | 91.35 | 92.39 | 949,200 | 1.07 |  | 1.17 | 4 |
| AMAG | AMAG Pharmaceuticals Inc. | 20.79 | 20.11 | 20.73 | 88,900 | 0.52 |  | 2.57 | 6 |
| AMAP | Autonavi Holdings | 12.93 | 12.65 | 12.79 | 287,100 | 0.01 |  | 0.08 | 7 |
| AMAT | Applied Materials Inc. | 16.09 | 15.77 | 15.97 | 13,866,600 | 0.19 |  | 1.20 | 6 |
| AMCC | Applied Micro Circuits Corporation | 9.740 | 8.150 | 9.720 | 2,907,000 | 1.620 |  | 20.00 | 6 |
| AMCF | ANDATEE CHINA MARINE FUEL SERVI | 0.5100 | 0.5100 | 0.5100 | 1,000 | 0.0800 |  | 13.56 | 4 |
| AMCN | AirMedia Group Inc | 1.870 | 1.740 | 1.860 | 28,800 | 0.120 |  | 6.90 | 5 |
| AMED | Amedisys Inc | 13.86 | 13.28 | 13.60 | 218,000 | 0.19 |  | 1.42 | 6 |
| AMGN | Amgen Inc. | 102.29 | 99.07 | 101.50 | 3,328,900 | 2.42 |  | 2.44 | 4 |
| AMIC | American Independence Corp. | 7.280 | 6.990 | 7.000 | 4,900 | 0.420 |  | 5.66 | 5 |
| AMKR | Amkor Technology Inc. | 4.420 | 4.330 | 4.410 | 973,300 | 0.080 |  | 1.85 | 5 |
| AMNB | American National Bankshares Inc. | 23.00 | 22.65 | 22.99 | 10,500 | 0.34 |  | 1.50 | 6 |
| AMOT | Allied Motion Technologies Inc. | 7.000 | 6.880 | 6.990 | 9,000 | 0.000 |  | 0.00 | 6 |
| AMOV | America Movil S.A.B. de C.V. | 20.18 | 20.02 | 20.09 | 2,100 | 0.08 |  | 0.40 | 5 |
| AMRB | American River Bankshares | 8.800 | 8.250 | 8.450 | 900 | 0.240 |  | 2.92 | 5 |
| AMRI | Albany Molecular Research Inc. | 12.22 | 11.76 | 11.97 | 211,400 | 0.13 |  | 1.07 | 6 |
| AMRN | Amarin Corporation PLC | 6.720 | 6.500 | 6.600 | 3,107,300 | 0.020 |  | 0.30 | 5 |
| AMRS | Amyris Inc. | 2.730 | 2.630 | 2.700 | 323,900 | 0.080 |  | 3.05 | 5 |
| AMSC | American Superconductor Corporation | 2.260 | 2.120 | 2.160 | 1,307,200 | 0.140 |  | 6.09 | 4 |
| AMSF | AMERISAFE Inc. | 33.84 | 33.18 | 33.64 | 93,000 | 0.20 |  | 0.60 | 5 |
| AMSG | Amsurg Corp. | 36.76 | 36.12 | 36.74 | 68,700 | 0.53 |  | 1.46 | 6 |
| AMSWA | American Software Inc. | 8.490 | 8.300 | 8.440 | 26,600 | 0.010 |  | 0.12 | 5 |
| AMWD | American Woodmark Corporation | 36.40 | 35.55 | 36.20 | 197,000 | 0.29 |  | 0.79 | 4 |
| AMZN | Amazon.com Inc. | 282.91 | 278.11 | 281.76 | 2,147,600 | 3.70 |  | 1.33 | 7 |
| ANAC | Anacor Pharmaceuticals Inc. | 5.280 | 4.920 | 5.200 | 268,900 | 0.210 |  | 4.21 | 5 |
| ANAD | ANADIGICS Inc. | 2.230 | 2.110 | 2.220 | 467,000 | 0.110 |  | 5.21 | 6 |
| ANAT | American National Insurance Company | 99.78 | 98.13 | 98.98 | 12,100 | 0.40 |  | 0.41 | 6 |
| ANCB | Anchor Bancorp | 17.57 | 17.57 | 17.57 | 100 | 0.22 |  | 1.27 | 5 |
| ANCI | AMERICAN CARESOURCE | 1.950 | 1.830 | 1.950 | 1,700 | 0.120 |  | 6.56 | 6 |
| ANCX | Access National Corporation | 13.17 | 12.57 | 13.00 | 31,600 | 0.29 |  | 2.28 | 4 |
| ANDE | Andersons Inc. (The) | 54.07 | 53.10 | 54.00 | 73,200 | 0.49 |  | 0.92 | 5 |
| ANEN | Anaren Inc. | 24.25 | 23.83 | 23.98 | 26,700 | 0.16 |  | 0.67 | 5 |
| ANGO | AngioDynamics Inc. | 11.24 | 11.11 | 11.18 | 56,200 | 0.14 |  | 1.27 | 6 |
| ANIK | Anika Therapeutics Inc. | 17.78 | 16.47 | 17.55 | 216,900 | 1.00 |  | 6.04 | 7 |
| 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. | 77.13 | 75.86 | 76.51 | 372,800 | 0.66 |  | 0.87 | 6 |
| ANTH | ANTHERA PHARMACEUTICALS INC. | 0.5800 | 0.5600 | 0.5800 | 169,800 | 0.0100 |  | 1.75 | 6 |
| ANTP | PHAZAR CORP | 1.220 | 1.190 | 1.190 | 4,200 | 0.030 |  | 2.46 | 4 |
| AOSL | ALPHA & OMEGA SEMICONDUCOR LTD. | 7.820 | 7.510 | 7.750 | 42,600 | 0.280 |  | 3.75 | 5 |
| APAGF | APCO Argentina Inc. | 13.67 | 12.49 | 13.60 | 66,900 | 1.14 |  | 9.15 | 5 |
| APEI | American Public Education Inc. | 39.01 | 37.84 | 38.76 | 113,300 | 0.80 |  | 2.11 | 6 |
| APFC | American Pacific Corporation | 27.85 | 27.25 | 27.70 | 24,100 | 0.27 |  | 0.98 | 5 |
| APKT | Acme Packet Inc. | 29.25 | 29.22 | 29.24 | 1,921,700 | 0.02 |  | 0.07 | 6 |
| APOG | Apogee Enterprises Inc. | 25.56 | 24.89 | 25.09 | 293,300 | 0.29 |  | 1.14 | 4 |
| APOL | Apollo Group Inc. | 21.07 | 20.00 | 20.20 | 1,866,000 | 0.67 |  | 3.21 | 6 |
| APPY | AspenBio Pharma Inc. | 1.340 | 1.260 | 1.320 | 564,500 | 0.050 |  | 3.94 | 5 |
| APRI | Nexmed Inc. | 2.750 | 2.530 | 2.570 | 529,200 | 0.090 |  | 3.38 | 6 |
| APSA | Alto Palermo S.A. | 15.95 | 15.70 | 15.95 | 800 | 0.30 |  | 1.85 | 6 |
| ARAY | Accuray Incorporated | 5.910 | 5.820 | 5.900 | 489,400 | 0.030 |  | 0.51 | 6 |
| ARCC | Ares Capital Corporation | 17.03 | 16.85 | 16.99 | 1,594,800 | 0.15 |  | 0.89 | 5 |
| ARCI | Appliance Recycling Centers of America | 2.170 | 2.120 | 2.150 | 19,400 | 0.020 |  | 0.92 | 6 |
| ARCW | Arc Wireless Solutions Inc. | 5.320 | 5.210 | 5.300 | 700 | 0.140 |  | 2.57 | 6 |
| ARDNA | Arden Group Inc. | 110.50 | 109.03 | 110.21 | 1,700 | 0.28 |  | 0.25 | 6 |
| AREX | Approach Resources Inc. | 24.99 | 24.31 | 24.97 | 247,000 | 0.54 |  | 2.21 | 3 |
| ARIA | ARIAD Pharmaceuticals Inc. | 17.99 | 17.43 | 17.78 | 814,700 | 0.03 |  | 0.17 | 5 |
| ARII | American Railcar Industries Inc. | 33.98 | 33.00 | 33.78 | 325,000 | 0.78 |  | 2.36 | 4 |
| ARKR | Ark Restaurants Corp. | 21.97 | 21.23 | 21.97 | 7,200 | 0.39 |  | 1.81 | 5 |
| ARLP | Alliance Resource Partners L.P. | 72.50 | 71.02 | 71.70 | 45,100 | 0.29 |  | 0.41 | 3 |
| ARMH | ARM Holdings plc | 39.94 | 39.45 | 39.52 | 3,471,300 | 0.69 |  | 1.78 | 4 |
| ARNA | Arena Pharmaceuticals Inc. | 7.570 | 7.400 | 7.510 | 5,434,500 | 0.010 |  | 0.13 | 5 |
| AROW | Arrow Financial Corporation | 24.94 | 24.74 | 24.79 | 14,900 | 0.13 |  | 0.53 | 4 |
| ARQL | ArQule Inc. | 2.430 | 2.350 | 2.430 | 214,200 | 0.060 |  | 2.53 | 4 |
| ARRS | Arris Group Inc | 14.95 | 14.60 | 14.89 | 1,290,700 | 0.34 |  | 2.34 | 4 |
| ARRY | Array BioPharma Inc. | 5.120 | 4.950 | 4.960 | 1,168,100 | 0.130 |  | 2.55 | 4 |
| ARTC | ArthroCare Corporation | 36.58 | 35.74 | 36.19 | 212,200 | 0.29 |  | 0.81 | 7 |
| ARTNA | Artesian Resources Corporation | 22.04 | 21.72 | 22.02 | 15,500 | 0.39 |  | 1.80 | 4 |
| ARTW | Art's-Way Manufacturing Co. Inc. | 7.650 | 7.510 | 7.560 | 7,000 | 0.040 |  | 0.53 | 5 |
| ARTX | Arotech Corporation | 1.700 | 1.570 | 1.600 | 175,500 | 0.050 |  | 3.23 | 5 |
| ARUN | Aruba Networks Inc. | 14.99 | 14.69 | 14.72 | 1,789,600 | 0.07 |  | 0.47 | 5 |
| ARWR | Arrowhead Research Corporation | 1.990 | 1.940 | 1.990 | 47,300 | 0.010 |  | 0.51 | 4 |
| ASBC | Associated Banc-Corp | 15.37 | 15.13 | 15.29 | 581,300 | 0.07 |  | 0.46 | 5 |
| ASBI | Ameriana Bancorp | 10.000 | 10.000 | 10.000 | 100 | 0.000 |  | 0.00 | 5 |
| ASCA | Ameristar Casinos Inc. | 26.40 | 26.33 | 26.36 | 278,500 | 0.03 |  | 0.11 | 6 |
| ASCMA | ASCENT MEDIA CORP | 75.24 | 73.24 | 74.69 | 28,000 | 1.48 |  | 2.02 | 5 |
| ASEI | American Science and Engineering Inc. | 59.71 | 58.78 | 59.41 | 33,600 | 0.32 |  | 0.54 | 5 |
| ASFI | Asta Funding Inc. | 8.850 | 8.690 | 8.760 | 19,600 | 0.100 |  | 1.15 | 4 |
| ASIA | AsiaInfo Holdings Inc. | 11.65 | 11.59 | 11.61 | 144,200 | 0.00 |  | 0.00 | 6 |
| ASMI | ASM International N.V. | 35.80 | 35.54 | 35.63 | 3,900 | 1.16 |  | 3.37 | 5 |
| ASML | ASML Holding N.V. | 80.45 | 79.55 | 80.35 | 567,400 | 1.08 |  | 1.36 | 4 |
| ASNA | The Dress Barn Inc. | 17.78 | 17.57 | 17.69 | 1,374,200 | 0.01 |  | 0.06 | 3 |
| ASPS | ALTISOURCE PORTFOLIO SOLUTIO | 102.15 | 99.61 | 100.15 | 129,400 | 0.75 |  | 0.75 | 7 |
| ASRV | AmeriServ Financial Inc. | 3.110 | 3.010 | 3.060 | 24,100 | 0.040 |  | 1.32 | 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 | 0.7600 | 1,400 | 0.0100 |  | 1.30 | 5 |
| ASTE | Astec Industries Inc. | 34.98 | 34.36 | 34.89 | 31,200 | 0.55 |  | 1.60 | 4 |
| ASTI | Ascent Solar Technologies Inc. | 0.8000 | 0.7500 | 0.7800 | 332,900 | 0.0300 |  | 4.00 | 4 |
| ASTM | Aastrom Biosciences Inc. | 0.5100 | 0.4900 | 0.5100 | 222,900 | 0.0000 |  | 0.00 | 5 |
| ASUR | Forgent Networks Inc | 5.800 | 5.800 | 5.800 | 600 | 0.040 |  | 0.68 | 5 |
| ASYS | Amtech Systems Inc. | 5.190 | 4.730 | 4.980 | 25,200 | 0.090 |  | 1.84 | 6 |
| ATAI | ATA Inc. | 4.150 | 4.150 | 4.150 | 1,100 | 0.000 |  | 0.00 | 7 |
| ATAX | America First Tax Exempt Investors L.P. | 6.950 | 6.850 | 6.860 | 87,900 | 0.010 |  | 0.15 | 6 |
| ATEA | Astea International Inc. | 2.200 | 2.090 | 2.120 | 3,300 | 0.070 |  | 3.20 | 5 |
| ATEC | Alphatec Holdings Inc. | 2.090 | 1.960 | 2.090 | 219,200 | 0.140 |  | 7.18 | 5 |
| ATHN | athenahealth Inc. | 92.48 | 90.05 | 90.97 | 270,500 | 0.68 |  | 0.75 | 7 |
| ATHX | Athersys Inc. | 1.770 | 1.610 | 1.710 | 777,200 | 0.090 |  | 5.56 | 4 |
| ATLO | Ames National Corporation | 23.15 | 22.33 | 22.68 | 30,400 | 0.03 |  | 0.13 | 7 |
| ATMI | ATMI Inc. | 24.67 | 24.20 | 24.58 | 81,900 | 0.47 |  | 1.95 | 7 |
| ATML | Atmel Corporation | 8.030 | 7.810 | 7.910 | 7,890,800 | 0.070 |  | 0.89 | 5 |
| ATNI | Atlantic Tele-Network Inc. | 50.83 | 49.13 | 50.71 | 32,700 | 1.48 |  | 3.01 | 5 |
| ATRC | AtriCure Inc. | 9.250 | 9.040 | 9.120 | 58,600 | 0.070 |  | 0.76 | 5 |
| ATRI | ATRION Corporation | 221.96 | 219.95 | 221.96 | 1,100 | 2.10 |  | 0.96 | 5 |
| ATRM | Aetrium Incorporated | 0.6000 | 0.5300 | 0.5400 | 7,500 | 0.0200 |  | 3.57 | 5 |
| ATRO | Astronics Corporation | 41.31 | 40.13 | 41.05 | 127,000 | 0.90 |  | 2.24 | 6 |
| ATSG | Air Transport Services Group Inc | 6.720 | 6.330 | 6.660 | 136,700 | 0.190 |  | 2.94 | 6 |
| ATTU | Attunity Ltd. | 5.750 | 5.400 | 5.700 | 18,100 | 0.250 |  | 4.59 | 4 |
| ATVI | Activision Blizzard Inc | 14.81 | 14.54 | 14.59 | 9,396,700 | 0.14 |  | 0.95 | 5 |
| ATX | CROSS A T CO | 16.25 | 15.76 | 16.15 | 50,100 | 0.34 |  | 2.15 | 7 |
| AUBN | Auburn National Bancorporation Inc. | 21.98 | 21.73 | 21.98 | 400 | 0.26 |  | 1.20 | 5 |
| AUDC | AudioCodes Ltd. | 4.600 | 4.460 | 4.560 | 91,800 | 0.080 |  | 1.79 | 6 |
| AUXL | Auxilium Pharmaceuticals Inc. | 17.39 | 16.95 | 17.34 | 588,100 | 0.10 |  | 0.58 | 6 |
| AVAV | AeroVironment Inc. | 19.80 | 19.57 | 19.75 | 263,800 | 0.05 |  | 0.25 | 4 |
| AVEO | AVEO PHARMACEUTICALS INC. | 2.710 | 2.590 | 2.620 | 458,400 | 0.030 |  | 1.13 | 5 |
| AVGO | AVAGO TECHNOLOGIES | 38.80 | 37.98 | 38.75 | 2,738,200 | 0.66 |  | 1.73 | 7 |
| AVID | Avid Technology Inc. | 6.450 | 6.190 | 6.410 | 80,900 | 0.190 |  | 3.05 | 4 |
| AVNR | Avanir Pharmaceuticals | 4.620 | 4.330 | 4.610 | 3,017,000 | 0.090 |  | 1.99 | 7 |
| AVNW | AVIAT NETWORKS INC | 2.820 | 2.700 | 2.820 | 257,300 | 0.080 |  | 2.92 | 6 |
| AWRE | Aware Inc. | 5.280 | 5.060 | 5.080 | 113,100 | 0.180 |  | 3.42 | 5 |
| AXAS | Abraxas Petroleum Corporation | 2.240 | 2.190 | 2.240 | 798,800 | 0.050 |  | 2.28 | 4 |
| AXFN | ISHARES TRUST | 23.88 | 23.88 | 23.88 | 200 | 0.36 |  | 1.53 | 4 |
| AXTI | AXT Inc | 2.790 | 2.740 | 2.770 | 95,800 | 0.030 |  | 1.09 | 4 |
| AZPN | Aspen Technology, Inc. | 30.01 | 29.75 | 29.85 | 434,300 | 0.21 |  | 0.71 | 4 |