| Term |
| AACC - Asset Acceptance Capital Corp. |
| AAII - Alabama Aircraft Industries Inc. |
| AAME - Atlantic American Corporation |
| AANB - Abigail Adams National Bancorp Inc. |
| AAON - AAON Inc. |
| AAPL - Apple Inc. |
| AATI - Advanced Analogic Technologies Inc. |
| AAUK - Anglo American plc |
| AAWW - Atlas Air Worldwide Holdings |
| ABAT - Advanced Battery Technologies Inc. |
| ABAX - ABAXIS Inc. |
| ABBC - Abington Bancorp Inc. |
| ABCB - Ameris Bancorp |
| ABCO - Advisory Board Company (The) |
| ABCW - Anchor BanCorp Wisconsin Inc. |
| ABFS - Arkansas Best Corporation |
| ABII - Abraxis Bioscience Inc. |
| ABMC - American Bio Medica Corp. |
| ABMD - ABIOMED Inc. |
| ABNJ - American Bancorp of New Jersey Inc. |
| ABPI - Accentia Biopharmaceuticals Inc. |
| ABTL - Autobytel Inc. |
| ABVA - Alliance Bankshares Corporation |
| ABXA - ABX Holdings Inc. |
| ACAD - ACADIA Pharmaceuticals Inc. |
| ACAP - American Physicians Capital Inc. |
| ACAS - American Capital Strategies Ltd. |
| ACAT - Arctic Cat Inc. |
| ACBA - American Community Bancshares |
| ACCL - Accelrys Inc. |
| ACEL - Alfacell Corporation |
| ACET - Aceto Corporation |
| ACFC - Atlantic Coast Federal Corporation |
| ACFN - Acorn Energy Inc. |
| ACGL - Arch Capital Group Ltd. |
| ACGY - Acergy S.A. |
| ACHN - Achillion Pharmaceuticals Inc. |
| ACIW - ACI Worldwide Inc. |
| ACLI - American Commercial Lines Inc |
| ACLS - Axcelis Technologies Inc. |
| ACME - ACME Communications Inc. |
| ACMR - A.C. Moore Arts & Crafts Inc. |
| ACOR - Acorda Therapeutics Inc. |
| ACPW - Active Power Inc. |
| ACSEF - ACS Motion Control Ltd. |
| ACTG - Acacia Research Corporation |
| ACTI - ActivIdentity Corporation |
| ACTL - Actel Corporation |
| ACTS - Actions Semiconductor Co. Ltd. |
| ACTU - Actuate Corporation |
| ACUR - Acura Pharmaceuticals Inc. |
| ACUS - Acusphere Inc. |
| ACWI - iShares MSCI ACWI Index Fund |
| ACWX - iShares MSCI ACWI ex US Index Fund |
| ACXM - Acxiom Corporation |
| ADAM - A.D.A.M. Inc. |
| ADAT - Authentidate Holding Corp. |
| ADBE - Adobe Systems Incorporated |
| ADCT - ADC Telecommunications Inc. |
| ADEP - Adept Technology Inc. |
| ADES - ADA-ES Inc. |
| ADGF - Adams Golf Inc. |
| ADLR - Adolor Corporation |
| ADLS - Advanced Life Sciences Holdings Inc. |
| ADPI - American Dental Partners Inc. |
| ADPT - Adaptec Inc. |
| ADRA - BLDRS Asia 50 ADR Index Fund |
| ADRD - BLDRS Developed Markets 100 ADR Index Fund |
| ADRE - BLDRS Emerging Markets 50 ADR Index Fund |
| ADRU - BLDRS Europe 100 ADR Index Fund |
| ADSK - Autodesk Inc. |
| ADTN - ADTRAN Inc. |
| ADVNA - ADVANTA Corp. |
| ADVNB - ADVANTA Corp. |
| ADVS - Advent Software Inc. |
| AEHR - Aehr Test Systems |
| AEIS - Advanced Energy Industries Inc. |
| AEPI - AEP Industries Inc. |
| AERG - Applied Energetics Inc |
| AERO - AeroGrow International Inc. |
| AERT - Advanced Environmental Recycling Technologies Inc. |
| AETI - American Electric Technologies Inc. |
| AEY - ADDvantage Technologies Group Inc. |
| AEZS - AEterna Zentaris Inc. |
| AFAM - Almost Family Inc |
| AFCE - AFC Enterprises Inc. |
| AFFM - Affirmative Insurance Holdings Inc. |
| AFFX - Affymetrix Inc. |
| AFFY - Affymax Inc. |
| AFOP - Alliance Fiber Optic Products Inc. |
| AFSI - AmTrust Financial Services Inc. |
| AGEN - Antigenics Inc. |
| AGII - Argo Group International Holdings Ltd. |
| AGIX - AtheroGenics Inc. |
| AGYS - Agilysys Inc. |
| AHCI - Allied HealthCare International Inc. |
| AHGP - Alliance Holdings GP L.P. |
| AHII - Animal Health International Inc. |
| AHPI - Allied Healthcare Products Inc. |
| AIMC - Altra Holdings Inc. |
| AINV - Apollo Investment Corporation |
| AIRM - Air Methods Corporation |
| AIRN - Airspan Networks Inc. |
| AIRT - Air T Inc. |
| AIRV - Airvana Inc. |
| AIXD - Access Integrated Technologies Inc. |
| AIXG - Aixtron Aktiengesellschaft |
| AKAM - Akamai Technologies Inc. |
| AKNS - Akeena Solar Inc. |
| AKRX - Akorn Inc. |
| ALAN - Alanco Technologies Inc. |
| ALCO - Alico Inc. |
| ALDA - Aldila Inc. |
| ALDN - Aladdin Knowledge Systems Limited |
| ALEX - Alexander & Baldwin Inc. |
| ALFA - Alfa Corporation |
| ALGN - Align Technology Inc. |
| ALGT - Allegiant Travel Company |
| ALKS - Alkermes Inc. |
| ALLB - Alliance Bancorp Inc. of Pennsylvania |
| ALLI - Allion Healthcare Inc. |
| ALLT - Allot Communications Ltd. |
| ALNC - Alliance Financial Corporation |
| ALNY - Alnylam Pharmaceuticals Inc. |
| ALOG - Analogic Corporation |
| ALOT - Astro-Med Inc. |
| ALOY - Alloy Inc. |
| ALSE - Alseres Pharmaceuticals Inc. |
| ALSK - Alaska Communications Systems Group Inc. |
| ALTH - Allos Therapeutics Inc. |
| ALTI - Altair Nanotechnologies Inc. |
| ALTR - Altera Corporation |
| ALTU - Altus Pharmaceuticals Inc. |
| ALUS - Alsius Corporation |
| ALUSU - Alsius Corporation |
| ALUSW - Alsius Corporation |
| ALVR - Alvarion Ltd. |
| ALXA - Alexza Pharmaceuticals Inc. |
| ALXN - Alexion Pharmaceuticals Inc. |
| AMAB - AmericasBank Corp. |
| AMAC - American Medical Alert Corp. |
| AMAG - AMAG Pharmaceuticals Inc. |
| AMAT - Applied Materials Inc. |
| AMCC - Applied Micro Circuits Corporation |
| AMCE - American Claims Evaluation Inc. |
| AMCN - AirMedia Group Inc |
| AMCP - AmCOMP Incorporated |
| AMCS - AMICAS Inc. |
| AMED - Amedisys Inc |
| AMEN - AMEN Properties Inc. |
| AMFI - Amcore Financial Inc. |
| AMGI - American Mold Guard Inc. |
| AMGIW - American Mold Guard Inc. |
| AMGIZ - American Mold Guard Inc. |
| AMGN - Amgen Inc. |
| AMIC - American Independence Corp. |
| AMIE - Ambassadors International Inc. |
| AMIN - American International Industries Inc |
| AMKR - Amkor Technology Inc. |
| AMLN - Amylin Pharmaceuticals Inc. |
| AMMD - American Medical Systems Holdings Inc. |
| AMNB - American National Bankshares Inc. |
| AMOT - Allied Motion Technologies Inc. |
| AMOV - America Movil S.A.B. de C.V. |
| AMPH - American Physicians Service Group Inc. |
| AMPL - Ampal-American Israel Corporation |
| AMPX - Ampex Corporation |
| AMRB - American River Bankshares |
| AMRI - Albany Molecular Research Inc. |
| AMRN - Amarin Corporation PLC |
| AMSC - American Superconductor Corporation |
| AMSF - AMERISAFE Inc. |
| AMSG - Amsurg Corp. |
| AMSWA - American Software Inc. |
| AMTC - Ameritrans Capital Corporation |
| AMTCP - Ameritrans Capital Corporation |
| AMTD - TD Ameritrade Holding Corporation |
| AMTY - Amerityre Corporation |
| AMWD - American Woodmark Corporation |
| AMZN - Amazon.com Inc. |
| ANAD - ANADIGICS Inc. |
| ANAT - American National Insurance Company |
| ANCX - Access National Corporation |
| ANDE - Andersons Inc. (The) |
| ANDS - Anadys Pharmaceuticals Inc. |
| ANEN - Anaren Inc. |
| ANGN - Angeion Corporation |
| ANGO - AngioDynamics Inc. |
| ANIK - Anika Therapeutics Inc. |
| ANLY - Analysts International Corporation |
| ANNB - Annapolis Bancorp Inc. |
| ANPI - Angiotech Pharmaceuticals Inc. |
| ANSS - ANSYS Inc. |
| ANST - Ansoft Corporation |
| ANSV - Anesiva Inc. |
| ANSW - Answers Corporation |
| ANTP - PHAZAR CORP |
| APAB - Appalachian Bancshares Inc. (GA) |
| APAC - APAC Customer Services Inc. |
| APAGF - APCO Argentina Inc. |
| APEI - American Public Education Inc. |
| APFC - American Pacific Corporation |
| APII - Action Products International Inc. |
| APKT - Acme Packet Inc. |
| APOG - Apogee Enterprises Inc. |
| APOL - Apollo Group Inc. |
| APPA - A.P. Pharma Inc. |
| APPX - APP Pharmaceuticals |
| APPY - AspenBio Pharma Inc. |
| APSA - Alto Palermo S.A. |
| APSG - Applied Signal Technology Inc. |
| APWR - A-Power Energy Generation Systems Ltd. |
| ARAY - Accuray Incorporated |
| ARBA - Ariba Inc. |
| ARBX - Arbinet-thexchange Inc. |
| ARCC - Ares Capital Corporation |
| ARCCR - Ares Capital Corporation |
| ARCI - Appliance Recycling Centers of America Inc. |
| ARCW - Arc Wireless Solutions Inc. |
| ARDNA - Arden Group Inc. |
| AREX - Approach Resources Inc. |
| ARGN - Amerigon Incorporated |
| ARIA - ARIAD Pharmaceuticals Inc. |
| ARII - American Railcar Industries Inc. |
| ARKR - Ark Restaurants Corp. |
| ARLP - Alliance Resource Partners L.P. |
| ARMHY - ARM Holdings plc |
| ARNA - Arena Pharmaceuticals Inc. |
| AROW - Arrow Financial Corporation |
| ARQL - ArQule Inc. |
| ARRS - Arris Group Inc |
| ARRY - Array BioPharma Inc. |
| ARSD - Arabian American Development Company |
| ARST - Arc Sight Inc. |
| ARTC - ArthroCare Corporation |
| ARTE - Artes Medical Inc. |
| ARTG - Art Technology Group Inc. |
| ARTL - The Aristotle Corporation |
| ARTLP - The Aristotle Corporation |
| ARTNA - Artesian Resources Corporation |
| ARTW - Art s-Way Manufacturing Co. Inc. |
| ARTX - Arotech Corporation |
| ARUN - Aruba Networks Inc. |
| ARWR - Arrowhead Research Corporation |
| ARYX - ARYx Therapeutics Inc. |
| ASBC - Associated Banc-Corp |
| ASBI - Ameriana Bancorp |
| ASCA - Ameristar Casinos Inc. |
| ASEI - American Science and Engineering Inc. |
| ASFI - Asta Funding Inc. |
| ASFN - Atlantic Southern Financial Group Inc. |
| ASGN - On Assignment Inc. |
| ASGR - America Service Group Inc. |
| ASHW - Ashworth Inc. |
| ASIA - AsiaInfo Holdings Inc. |
| ASMI - ASM International N.V. |
| ASML - ASML Holding N.V. |
| ASPM - Aspect Medical Systems Inc. |
| ASRV - AmeriServ Financial Inc. |
| ASRVP - AmeriServ Financial Inc. |
| ASTE - Astec Industries Inc. |
| ASTI - Ascent Solar Technologies Inc. |
| ASTIZ - Ascent Solar Technologies Inc. |
| ASTM - Aastrom Biosciences Inc. |
| ASTSF - ASE Test Limited |
| ASUR - Forgent Networks Inc |
| ASYS - Amtech Systems Inc. |
| ASYT - Asyst Technologies Inc. |
| ATAC - Aftermarket Technology Corp. |
| ATAI - ATA Inc. |
| ATAR - Atari Inc. |
| ATAXZ - America First Tax Exempt Investors L.P. |
| ATBC - Atlantic BancGroup Inc |
| ATCO - American Technology Corporation |
| ATEA - Astea International Inc. |
| ATEC - Alphatec Holdings Inc. |
| ATGN - AltiGen Communications Inc. |
| ATHN - athenahealth Inc. |
| ATHR - Atheros Communications Inc. |
| ATHX - Athersys Inc. |
| ATLO - Ames National Corporation |
| ATLS - Atlas America Inc. |
| ATMI - ATMI Inc. |
| ATML - Atmel Corporation |
| ATNI - Atlantic Tele-Network Inc. |
| ATPG - ATP Oil & Gas Corporation |
| ATRC - AtriCure Inc. |
| ATRI - ATRION Corporation |
| ATRM - Aetrium Incorporated |
| ATRO - Astronics Corporation |
| ATSI - ATS Medical Inc. |
| ATVI - Activision Inc. |
| AUBN - Auburn National Bancorporation Inc. |
| AUDC - AudioCodes Ltd. |
| AUSA - Access Plans USA Inc. |
| AUTH - AuthenTec Inc. |
| AUXL - Auxilium Pharmaceuticals Inc. |
| AVAN - Avant Immunotherapeutics Inc. |
| AVAV - AeroVironment Inc. |
| AVCA - Advocat Inc. |
| AVCT - Avocent Corporation |
| AVGN - Avigen Inc. |
| AVID - Avid Technology Inc. |
| AVII - AVI BioPharma Inc. |
| AVNR - AVANIR Pharmaceuticals |
| AVNX - Avanex Corporation |
| AVRX - Avalon Pharmaceuticals Inc. |
| AVSR - Avistar Communications Corporation |
| AVTR - Avatar Holdings Inc. |
| AVZA - Aviza Technology Inc. |
| AWBC - AmericanWest Bancorporation |
| AWRE - Aware Inc. |
| AXTI - AXT Inc |
| AXYS - Axsys Technologies Inc. |
