Costpoint calculates realized gains and losses when cash is received for the invoice or when the voucher is paid. 

It calculates the gain or loss by comparing the functional currency amount that was calculated when the invoice was created to the functional currency at the time that the invoice was paid. The difference between these two amounts is the realized gain or loss on the transaction. 

Optionally, you can also have Costpoint calculate unrealized gains and losses at the end of any accounting period. Currently, Costpoint can calculate unrealized losses only on open payables and receivables. Costpoint compares the functional currency that was calculated when the invoice was created or the voucher was posted to the functional currency at the current exchange rate. The difference is the unrealized gain or loss. The total unrealized gain or loss is posted to the accounts that you have identified as unrealized accounts on the Manage Multicurrency Accounts screen. You can have unrealized gains and losses computed using either the inception-to-date method or the net change method. Select the method on the Configure Multicurrency Settings screen.  Once cash is received for an outstanding invoice or payment is made on a voucher, the gain or loss becomes a realized one. When the realized gains or loss is computed, Costpoint reverses all unrealized gains or losses that have been recorded for that transaction. To allow for this reversal, it stores the unrealized gain or loss amount in the accounts receivable and accounts payable history tables.