Explanation

Loss severity refers to the amount of loss a creditor experiences when a borrower defaults. In the hierarchy of debt claims, the order of priority determines loss severity:

1. Third lien debt - This is the lowest priority among the options given. It has a third claim on collateral, meaning it gets paid only after first and second lien holders are satisfied. In a default scenario, there's often little or nothing left for third lien holders, resulting in the highest loss severity.

2. Senior subordinated debt - This ranks above junior/subordinated debt but below senior unsecured debt. It has moderate loss severity.

3. Senior unsecured debt - This ranks higher than subordinated debt but doesn't have specific collateral backing. However, it still has priority over subordinated debt in the capital structure.

Key Concept: In fixed income analysis, the capital structure hierarchy is:

• Secured debt (first lien, second lien, etc.)
• Senior unsecured debt
• Senior subordinated debt
• Subordinated debt
• Junior subordinated debt
• Equity

Third lien debt, being at the bottom of the secured debt hierarchy, typically experiences the highest loss severity because it has the lowest claim on assets in a liquidation scenario.