A client says your position does not match their custodian statement. How do you work out who is right, and what does a corporate action do to that answer?
A position is what you have traded, a holding is what the custodian says you own, and they legitimately differ by unsettled trades and pending entitlements. Reconciliation compares both against the custodian's statements, and corporate actions break it when an election deadline is missed. Use this custody answer to show the decision, trade-off, and evidence rather than a memorised definition.