For a list of stocks from the major US stock exchanges which are used in the Stock Challenge, please see the links below. Stocks symbols are listed by alphabetical order.

O - Realty Income Corporation
OA - Orbital ATK, Inc.
OAK - Oaktree Capital Group, LLC Clas
OAKS - Five Oaks Investment Corp.
OAS - Oasis Petroleum Inc.
OB - OneBeacon Insurance Group, Ltd.
OBAS - Optibase Ltd. - Ordinary Shares
OBCI - Ocean Bio-Chem, Inc.
OC - Owens Corning Inc New
OCAT - OCATA THERAPEUTICS
OCC - Optical Cable Corporation
OCFC - OceanFirst Financial Corp.
OCIP - OCI Partners LP Common Units re
OCIR - OCI Resources LP Common Units r
OCLR - Oclaro, Inc.
OCLS - Oculus Innovative Sciences, Inc
OCLSW - Oculus Innovative Sciences, Inc
OCN - Ocwen Financial Corporation NEW
OCR - Omnicare, Inc. Common Stock
OCRX - Ocera Therapeutics, Inc.
OCUL - Ocular Therapeutix, Inc.
ODC - Oil-Dri Corporation Of America
ODFL - Old Dominion Freight Line, Inc.
ODP - Office Depot, Inc.
OEC - Orion Engineered Carbons S.A
OESX - Orion Energy Systems, Inc.
OFC - Corporate Office Properties Tru
OFED - Oconee Federal Financial Corp.
OFG - OFG Bancorp
OFIX - Orthofix International N.V.
OFLX - Omega Flex, Inc.
OFS - OFS Capital Corporation
OGE - OGE Energy Corporation
OGEN - Oragenics, Inc. Common Stock
OGS - ONE Gas, Inc.
OGXI - OncoGenex Pharmaceuticals Inc.
OHAI - OHA Investment Corporation - Cl
OHGI - One Horizon Group, Inc.
OHI - Omega Healthcare Investors, Inc
OHRP - Ohr Pharmaceuticals, Inc.
OI - Owens-Illinois, Inc.
OIA - Invesco Municipal Income Opport
OIBR - Oi S.A. American Depositary Sha
OII - Oceaneering International, Inc.
OIIM - O2Micro International Limited -
OIS - Oil States International, Inc.
OKE - ONEOK, Inc.
OKS - ONEOK Partners, L.P.
OKSB - Southwest Bancorp, Inc.
OLBK - Old Line Bancshares, Inc.
OLED - Universal Display Corporation
OLN - Olin Corporation
OLP - One Liberty Properties, Inc.
OMAB - Grupo Aeroportuario del Centro
OMAM - OM Asset Management plc Ordinar
OMC - Omnicom Group Inc.
OMCL - Omnicell, Inc.
OME - Omega Protein Corporation
OMED - OncoMed Pharmaceuticals, Inc.
OMER - Omeros Corporation
OMEX - Odyssey Marine Exploration, Inc
OMG - OM Group, Inc. Common Stock
OMI - Owens & Minor, Inc.
OMN - OMNOVA Solutions Inc.
ON - ON Semiconductor Corporation
ONB - Old National Bancorp
ONCE - Spark Therapeutics, Inc.
ONCY - Oncolytics Biotech, Inc.
ONDK - On Deck Capital, Inc. Common St
ONE - Higher One Holdings, Inc. Commo
ONEQ - Fidelity Nasdaq Composite Index
ONFC - Oneida Financial Corp.
ONP - Orient Paper, Inc. NEW
ONTX - Onconova Therapeutics, Inc.
ONTY - Oncothyreon Inc.
ONVI - Onvia, Inc.
ONVO - Organovo Holdings, Inc.
OPB - Opus Bank
OPGN - OpGen, Inc.
OPGNW - OpGen, Inc. - Warrant
OPHC - OptimumBank Holdings, Inc.
OPHT - Ophthotech Corporation
OPK - Opko Health, Inc.
OPOF - Old Point Financial Corporation
OPTT - Ocean Power Technologies, Inc.
OPWR - Opower, Inc. Common Stock
OPXA - Opexa Therapeutics, Inc.
OPXAW - Opexa Therapeutics, Inc. - Warr
OPY - Oppenheimer Holdings, Inc. Clas
ORA - Ormat Technologies, Inc.
ORAN - Orange
ORBC - ORBCOMM Inc.
ORBK - Orbotech Ltd. - Ordinary Shares
ORC - Orchid Island Capital, Inc. Com
ORCL - Oracle Corporation
OREX - Orexigen Therapeutics, Inc.
ORI - Old Republic International Corp
ORIG - Ocean Rig UDW Inc. New
ORIT - Oritani Financial Corp.
ORLY - O'Reilly Automotive, Inc.
ORM - Owens Realty Mortgage, Inc.
ORMP - Oramed Pharmaceuticals Inc.
ORN - Orion Group Holdings, Inc. Comm
ORPN - Bioblast Pharma Ltd. - Ordinary
ORRF - Orrstown Financial Services Inc
OSBC - Old Second Bancorp, Inc.
OSBCP - Old Second Bancorp, Inc. - 7.80
OSGB - Overseas Shipholding Group, Inc
OSHC - Ocean Shore Holding Co.
OSIR - Osiris Therapeutics, Inc.
OSIS - OSI Systems, Inc.
OSK - Oshkosh Corporation (Holding Co
OSM - Navient Corporation
OSN - Ossen Innovation Co., Ltd. - Am
OSTK - Overstock.com, Inc.
OSUR - OraSure Technologies, Inc.
OTEL - Otelco Inc.
OTEX - Open Text Corporation
OTIC - Otonomy, Inc.
OTIV - On Track Innovations Ltd - Ordi
OTTR - Otter Tail Corporation
OUT - OUTFRONT Media Inc. Common Stoc
OUTR - Outerwall Inc.
OVAS - OvaScience Inc.
OVBC - Ohio Valley Banc Corp.
OVLY - Oak Valley Bancorp (CA)
OVTI - OmniVision Technologies, Inc.
OWW - Orbitz Worldwide, Inc. Common S
OXBR - Oxbridge Re Holdings Limited -
OXBRW - Oxbridge Re Holdings Limited -
OXFD - Oxford Immunotec Global PLC - O
OXGN - OXiGENE, Inc.
OXLC - Oxford Lane Capital Corp.
OXLCN - Oxford Lane Capital Corp. - 8.1
OXLCO - Oxford Lane Capital Corp. - Ter
OXLCP - Oxford Lane Capital Corp.
OXM - Oxford Industries, Inc.
OXY - Occidental Petroleum Corporatio
OZM - Och-Ziff Capital Management Gro
OZRK - Bank of the Ozarks

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