Obligations * Obligations Assimilables du Trésor (OATs) * Off Balance Sheet (OBS) Instrument * Offer Price * Off-Exchange Option Contract * Off-Exchange Task Force (OETF) * Office of the Controller of the Currency (OCC) * Off-Market Coupon Swap * Offset * Offsetting Swap * Offsetting Transaction * Offshore * Oil Price Derivatives * Omega * Omega Risk * One Cancels the Other Order (OCO) * One Touch Option * One-Off Transaction * One-Sided (or -Tailed) Test * One-Time Put Bond * One-Way Floater * Open Interest * Open Order * Open Outcry * Opening * Opening Purchase Transaction * Opening Range * Opening Rotation * Opening Sale Transaction * Operating Free-Cash Flow * Opportunistic Investment Manager * Opportunity Loss or Cost * Opportunity Value * Optimal Portfolio * Optimization of a Portfolio * Optimized Portfolio As Listed Securities (OPALS) * Option * Option Business * Option Buyer * Option Contract * Option Hedge * Option Income Fund * Option on a Cap * Option on a Floor * Option on a Spread * Option on a Swap * Option on an Option * Option Portfolio * Option Premium * Option Replication * Option Specification Error * Option Spread * Option Tender Bonds * Option to Double * Option Writer * Option-Adjusted Duration * Option-Adjusted Internal Rate of Return * Option-Adjusted Net Present Value * Option-Adjusted Spread (OAS) * Option-Adjusted Yield * Optional Redemption Provision * Option-dated Forward * Optioned Stock * Options Clearing Corporation (OCC) * Options Disclosure Document (ODD) * Options Exchange * Options to Purchase or Sell Specified Mortgage-Bac * Order Driven Market * Order Flow * Ordinary Least Squares * Ordinary Share * Original Issue Discount Bond * Ornstein-Uhlenbeck Process * Orthogonal * Out of the Money * Out Option * Outliers * Out-of-Sample Data * Outperformance Option * Outright Forward Currency Transaction * Outstrike * Over The Counter (OTC) * Over The Counter (OTC) Option * Over-and-Out Call * Over-and-Out Option * Over-and-Out Put * Overcollateralization * Overlay Risk Management * Overlay Strategies * Overline Situation * Overnight Delivery Risk * Overriding * Over-the-Top Option * Overwriting