High-yield · an asset-allocation anchor
Must know
- Sharpe = (R_p − R_f) ÷ σ_p
- Surplus = Assets − Liabilities (manage surplus risk for DB plans)
- Corner portfolios: combine the two adjacent to your target return
Decision rule
Explicit liabilities → liability-relative (surplus) optimisation, never asset-only mean-variance.
Trap — Recommending asset-only mean-variance for an investor with defined obligations (e.g. a DB plan).