casemark/constructing-portfolio-allocations

Constructing Portfolio Allocations

When To Use

• Building a strategic asset allocation (SAA) for a new portfolio or investment policy statement (IPS)
• Constructing a tactical asset allocation (TAA) overlay to tilt exposures relative to a policy benchmark
• Optimizing an existing portfolio's risk-return profile under updated capital market assumptions
• Creating model portfolios for client risk-profile tiers (e.g., conservative, moderate, aggressive)
• Evaluating allocation trade-offs when adding alternative asset classes or illiquid holdings

Inputs To Gather

• Investment objective and time horizon — total return target, income requirement, liability-matching need, or spending-rate constraint
• Risk parameters — maximum drawdown tolerance, volatility budget, tracking-error limit versus benchmark, and any VaR/CVaR constraints
• Eligible asset classes — equities (domestic/international/EM), fixed income (duration/credit tiers), real assets, alternatives (PE, hedge funds, real estate, infrastructure), cash equivalents
• Capital market assumptions (CMAs) — expected returns, standard deviations, and correlation matrix for each asset class; source and vintage of CMAs [VERIFY: confirm CMA provider and date]
• Constraints — regulatory limits (e.g., ERISA prudent-investor, insurance statutory caps), liquidity minimums, ESG/SRI exclusions, concentration caps per asset class or issuer, currency-hedging policy
• Current portfolio (if rebalancing) — existing holdings, unrealized gain/loss positions, and transaction-cost estimates
• Benchmark — policy benchmark or composite index for performance attribution

Workflow

1. Set the allocation framework

   • Choose methodology: mean-variance optimization (MVO), Black-Litterman, risk-parity, minimum-variance, or liability-driven investing (LDI)
   • For MVO: build the efficient frontier from CMAs; identify the tangency portfolio and the minimum-variance portfolio
   • For Black-Litterman: establish equilibrium returns from market-cap weights, then incorporate the manager's active views with confidence levels
   • For risk-parity: equalize risk contribution across asset classes using marginal risk decomposition

2. Apply constraints

   • Encode upper/lower bounds per asset class (e.g., alternatives ≤ 20%, domestic equity 30–60%)
   • Layer in liquidity requirement: ensure sufficient allocation to daily-liquid instruments to meet redemption or spending needs
   • Integrate ESG screens or exclusion lists if mandated by IPS
   • Apply regulatory floors/caps [VERIFY: jurisdiction-specific statutory allocation limits for insurance, pension, or sovereign wealth mandates]

3. Run optimization and scenario analysis

   • Generate optimal allocation at target return or target risk level
   • Run sensitivity analysis: stress-test output against ±1–2σ shifts in key CMAs (equity risk premium, credit spreads, inflation)
   • Compare efficient frontier portfolios at multiple risk points to give decision-makers a menu
   • Evaluate corner solutions — if optimizer pushes any asset class to a bound, document why and whether the constraint should be revisited

4. Construct model portfolio tiers (if applicable)

   • Map allocations to 3–5 risk-profile tiers aligned with client suitability questionnaires
   • Ensure each tier shows monotonically increasing equity/growth exposure and expected volatility
   • Assign implementation vehicles (index funds, ETFs, active managers, direct holdings) per sleeve

5. Document rebalancing and governance rules

   • Define rebalancing triggers: calendar-based (quarterly/annual) vs. threshold-based (±5% drift bands)
   • Specify TAA authority: allowable active tilts, maximum deviation from SAA, and approval process
   • Note tax-aware rebalancing considerations for taxable accounts (harvest losses, avoid short-term gains)

Output

• Allocation summary table — target weights per asset class with permissible ranges
• Efficient frontier chart — plotted portfolios with the selected allocation highlighted
• Risk decomposition — contribution to total portfolio risk by asset class (marginal and percentage)
• Scenario/stress-test results — portfolio return and drawdown under bull, base, and bear CMAs
• Model portfolio tiers (if multi-tier) — side-by-side allocation grids with expected return, volatility, Sharpe ratio, and max drawdown estimate per tier
• Methodology narrative — rationale for framework choice, key assumptions, and known limitations
• Rebalancing policy summary — triggers, bands, and governance authority

Quality Checks

• Weights sum to 100% across all asset classes in every tier
• No allocation breaches stated upper/lower bounds or regulatory caps
• Expected portfolio return and risk metrics are arithmetically consistent with CMAs and weights
• Correlation and volatility inputs match the stated CMA source and vintage — flag stale data (>12 months old) with [VERIFY]
• Liquidity profile supports stated spending/redemption needs without forced selling of illiquid sleeves
• Sharpe ratio and risk-contribution metrics are reasonable relative to historical ranges for similar portfolios
• Tax-lot and transaction-cost implications are noted for rebalancing recommendations in taxable accounts
• All assumptions and data sources are explicitly cited; no inferred figures presented as confirmed