Calculate P&L on certificate trading

Trigger: Execution of a certificate trade or the arrival of the daily trading cutoff time.

1. Extract daily certificate trade executions and inventory balances
2. Ingest daily settlement prices and market curves for certificates like RINs or carbon credits
3. Compute realized P&L from settled trades and surrendered certificates
4. Calculate unrealized mark-to-market P&L for open positions
5. Reconcile calculated P&L against trading desk estimates and registry data
6. Post finalized P&L values to the general ledger

Outcome: Profit and loss for the certificate trading portfolio is quantified, reconciled, and recorded in the financial ledger.