objective
obligation
obligation bond
obligor
obsolescence
OCC
occupancy agreement
occupation
occupational hazard
odd lot
odd lot buy/sell ratio
odd lot theory
OEX
of record
off the books
off-balance-sheet financing
off-board
off-floor order
offer
offer wanted
offering
offering circular
offering price
offering scale
officer
official
offset
offshore company
OID
oligopoly
oligopsony
omit
omitted dividend
OmniSky
on account
on balance
on budget
on close
on consignment
on demand
on margin
on open
on order
on spec
on-balance volume
on-floor order
on-the-spot loan
One-Cancels-All order
one-share one-vote rule
One-Triggers-All order
One-Triggers-OCO order
online banking
open
open economy
open ended
open interest
Open Interest (On Options orders page)
open market
open market operation
open mortgage
open outcry
Open outstanding call
open repo
open shop
open trade equity
open-end credit
open-end fund
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open-end management company
open-end mortgage
opening
opening bell
opening block
Opening Price (On Options orders page)
opening purchase
opening sale
operating
operating asset
operating cash flows
operating costs
operating cycle
operating income
operating lease
operating leverage
operating margin
operating profit
operating ratio
operation
operationally efficient market
opinion of title
opportunity cost
opportunity risk
OPRA
opt
optimization
optimize
optimum capacity
option
Option (On Options orders page)
Option (On Options orders page)
option account
option contract
option holder
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option margin
option premium
option series
option spread
option stop limit on quote order
Option Symbol
option writer
optional dividend
optionee
Options Clearing Corporation (OCC)
Options Prices Reporting Authority (OPRA)
Options Trading Levels
or better
order
order book
order flow
order imbalance
order ticket
ordinance
ordinary income
Ordinary Income Tax
ordinary interest
ordinary loss
org chart
organization
organizational chart
organized labor
original cost
original issue discount (OID)
original issue stock
Original Lot Cost
original margin
original maturity
original principal balance
origination fee
originator
OTC
OTC Bulletin Board
Other (1099-R)
other current assets
other income
other long term liabilities
Other Tax-Deferred Accounts
out of the money
out-of-cash date
out-of-favor
outcry
outgo
outlay
outside broker
outside director
outside financing
outside market
outsourcing
outstanding
outstanding stock
Over Bought
over-55 home sale exemption
over-the-counter (OTC)
overadvance
overage
overallotment
overbought
overbought/oversold indicator
overdraft
overdraft protection
overdue
overhang
overhead
overheating
overlapping debt
overlying mortgage
overnight repo
oversold
oversubscribed
overtrading
overvalued
overwithholding
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owe
Owed by Participant
own
owner financing
owner of record
owner's equity