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Term Description
OARS
objectivity
OCC
OCH
Odd Lot
Off-Board
Off-Hours Trading
off-market transfer
offer
offer period
offering circular
official list
offset
Open end fund
open interest
open order
open outcry trading
open position
Open-End Investment Company
Opening Automated Reporting System (OARS)
Opening Purchase
Opening Sale
opening trade
opening transaction
operating activities
operating profit (loss)
option
option buyer
option class
option holder
option premium
option pricing model
option series
option type
option writer
Options Clearing House Pty Ltd (OCH)
Order
ordinary share
OTC market
OTC option
out-of-the-money option
Outstanding Amount
Outstanding Shares
Over the Counter Bulletin Board - OTCBB
Over-The-Counter (OTC)
over-the-counter market
over-the-counter option
Overbought
overseas home exchange
Oversold
OARS
Opening Automated Report Service Provides improved accuracy and efficiency for handling certain orders sent before trading opens. OARS receives, stores, and continuously tabulates market orders up to a specified size routed through the common message switch. It matches buy and sell interest in each stock, calculates imbalances, and reports them to specialists. Seconds after the specialist notifies OARS of an opening price, the system automatically generates and returns execution reports to originating firms, and submits the trade for automatic clearance and settlement.
 
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