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It's definitely common to aggregate, often at the group level to give a holistic view. Many firms use a parent-level aggregation system, especially for the larger, more diversified counterparties.

You absolutely need to aggregate counterparty risk across all legal entities for a single counterparty. Otherwise, you're not seeing your true exposure, which is a massive blind spot.

This is a great question. Often, firms will aggregate counterparty risk at a group level, but then allocate exposure back to the individual legal entities based on their specific trades. This allows for a holistic view while still maintaining legal entity-specific risk management.

Aggregating counterparty risk across different legal entities can be tricky. You'd typically want a consolidated view at the group level, but the actual exposure might still be held and managed at the individual legal entity level due to regulatory and legal frameworks. How do you handle netting agreements in such a scenario?

This is a really critical question, especially for diversified financial institutions. While there can be firm-wide aggregation for an overall picture, often each legal entity will have its own credit limits and risk appetite for a counterparty, even if it's the same underlying entity. It often comes down to legal ring-fencing and what would happen in a default scenario for a specific trading vehicle.