- O/D
- OBI
- object and task technique
- objective
- obscuranto
- OBSF
- obsolescence
- occupational health
- occupational illness
- occupational psychology
- OCF
- OCR
- OECD
- OEIC
- OEM
- off-balance-sheet financing
- off-line transaction processing
- off-the-shelf company
- off-topic
- offer
- offer by prospectus
- offer document
- offer for sale
- offer price
- offering circular
- offering memorandum
- offering price
- offeror
- office design
- office junior
- office politics
- office-free
- officer
- officer of a company
- official bank
- official books of account
- official cash rate
- official development assistance
- official intervention
- official list
- official receiver
- offset
- offset clause
- offshore account
- offshore bank
- offshore company
- offshore finance subsidiary
- offshore financial center
- offshore financial subsidiary
- offshore holding company
- offshore production
- offshore trading company
- offshoring
- ohnosecond
- OI
- OINK
- Old Lady of Threadneedle Street
- old old
- older worker
- oligarchy
- oligopoly
- ombudsman
- omitted dividend
- omnibus account
- omnibus survey
- on account
- on demand
- on-hold advertising
- on-pack offer
- on-target earnings
- on-the-job training
- one-stop shopping
- one-to-one marketing
- one-to-one merger
- one-way trade
- one-year money
- online capture
- online catalog
- online community
- online shopping
- online shopping mall
- online training
- ooda loop
- OPEC
- open buying on the Internet
- open check
- open communication
- open economy
- open interest
- open learning
- open loop system
- open market operation
- open market value
- open standard
- open system
- open systems thinking
- open trading protocol
- open-book management
- open-collar worker
- open-door policy
- open-end credit
- open-end fund
- open-end management company
- open-end mortgage
- open-ended credit
- open-ended fund
- open-ended management company
- open-ended mortgage
- opening balance
- opening balance sheet
- opening bell
- opening price
- opening purchase
- opening stock
- operating cash flow
- operating costing
- operating cycle
- operating income
- operating lease
- operating leverage
- operating margin
- operating profit
- operating risk
- operating system
- operation time
- operational audit
- operational gearing
- operational research
- operations
- operations audit
- operations management
- opinion leader
- opinion leader research
- opinion shopping
- opinion survey
- opportunity cost
- OPT
- opt-in
- optimal portfolio
- optimal redemption provision
- optimize
- optimized production technology
- optimum capacity
- option
- option account
- option buyer
- option class
- option contract
- option elasticity
- option income fund
- option premium
- option price
- option pricing model
- option seller
- option series
- option writer
- optionaire
- options clearing corporation
- options market
- options on physicals
- OR
- order
- order book
- order confirmation
- order picking
- order point
- order processing
- orders pending
- ordinary interest
- ordinary shares
- org chart
- organigram
- Organisation for Economic Co-operation and Development
- organization
- organization behavior
- organization chart
- organization hierarchy
- organization man
- Organization of the Petroleum Exporting Countries
- organization structure
- organization theory
- organizational analysis
- organizational change
- organizational chart
- organizational commitment
- organizational culture
- organizational design
- organizational development
- organizational federalism
- organizational learning
- orientation
- original equipment manufacturer
- original face value
- original issue discount
- original maturity
- origination fee
- orthogonal
- OTC market
- OTE
- other capital
- other current assets
- other long-term capital
- other prices
- other short-term capital
- OTOH
- OTP
- out box
- out of the loop
- out tray
- outdoor advertising
- outdoor training
- outlier
- outplacement
- output
- output gap
- output method
- output tax
- outside director
- outsourcing
- outstanding check
- outstanding share
- outstanding share capital
- outward bound training
- outwork
- outworker
- over-the-counter market
- overall capitalization rate
- overall market capacity
- overall rate of return
- overall return
- overbid
- overbought
- overbought market
- overcapacity
- overcapitalize
- overcapitalized
- overdraft
- overdraft facility
- overdraft line
- overdraft protection
- overdraw
- overdrawn
- overdue
- overgeared
- overhanging
- overhead absorption rate
- overhead capacity variance
- overhead costs
- overhead expenditure variance
- overheads
- overinsuring
- overinvested
- overlap profit
- overnight position
- overnight repo
- overprice
- overrated
- overseas company
- Overseas Investment Commission
- overseas taxation
- oversold
- overstocked
- overtime
- overtime pay
- own brand
- own-label
- owner
- owner-operator
- owners' equity
- ownership of companies