Trade Capture System Interview Guide
Trade capture system interview guide for fills, execution reports, identifiers, persistence, positions, PnL handoff, and reconciliation.
Candidates discussing post-trade state and trading system data flow.
Trade capture records executions
Trade capture turns execution reports or fills into durable records used for positions, PnL, reconciliation, risk, and downstream reporting.
Identifiers prevent double counting
Order IDs, execution IDs, venue IDs, timestamps, account, symbol, side, price, and quantity help systems deduplicate and connect fills to intent.
Concrete example
If a partial fill arrives in two reports, trade capture should store both executions and update position once per unique execution, not once per message delivery.
Downstream systems need consistency
Positions, PnL, risk, and reconciliation consume trade records. A capture issue can spread quickly, so validation and audit trails matter.
Common mistakes
Candidates often stop at storing a trade row. Strong answers discuss idempotency, corrections, late reports, persistence, and reconciliation with external sources.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.