Terms A-Z O Terms O OTCQB Obamacare Obligor Offer in Compromise Offline Debit Card Offset Mortgage Oligarch Ombudsman On-Us Item One-Pay Lease Online Banking Online Bill Pay Online Savings Account Open Enrollment Open Interest in Trading Open-End Lease Open-End Mortgage Open-Ended Account Open-Loop Card Operating Expenses Opportunity Cost Opportunity Zone Option Adjustable-Rate Mortgage Option Assignment Options Roll Up Order Book Ordinary and Necessary Expenses Origination Fee Other Income on Form 1040 Out-of-Pocket Damages Out-of-Pocket Maximum Outstanding Shares Over-the-Counter (OTC) Market Overbought in Trading Overdraft Overfunded Pension Plan Overheated Economy Overtrading Owner Occupant More Terms A-Z: # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z