O OBV OECD OI OPEC OTC OTCBB OTS October Effect Odd Lot Odd Lot Theory OECD Off Balance Sheet Financing Office of Thrift Supervision (OTS) Offset Offshore Mutual Fund Omnibus Account On Balance Volume (OBV) On Stream One Night Stand Online Banking Open Open End Credit Open-End Fund Open Interest Open Listing Open Order Opening Bell Operating Expenses Operating Income Operating Lease Operating Leverage Operating Margin Option Option Chain Options Contract Order Organic Growth Organization of Petroleum Exporting Countries (OPEC) OTC Market Other Current Assets Other Current Liabilities Other Long Term Liabilities Out of the Money Outperform Outsourcing Outstanding Shares Overallotment Overbought Overdraft Oversold Oversubscribed Overtrading Over-The-Counter (OTC) Over-The-Counter Bulletin Board (OTCBB)