LONG (e.g. Long Order, Long Position)
Similar to 'BUY', a LONG position is achieved by a LONG order transaction.
SHORT (e.g. Short Order, Short Position)
Similar to 'SELL', a SHORT position is achieved by a SHORT order
transaction.
Net Position
LONG and SHORT transactions on the same item have opposite effects,
and they can offset each other to become a NET position on the item.
Margin Deposit
It is the cash amount being held up by the system as a deposit for
maintaining a Net Position on an item.
Portfolio
The combination list of all the NET (either LONG or SHORT) positions
a user has taken, and all the cash in the account.
Marked-to-Market
In order to reflect the most updated market value of each user's
portfolio, the system automatically realizes any gains or losses
on the day they occur. The Mark-to-Market mechanism uses the
latest 'Nominal Price' of an item to calculate the gains or losses
of the NET positions held by users and reflect in the 'Cash Available'
account.
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