| Liquidity tier | What it includes | Suggested retail allocation |
|---|---|---|
| Tier 1 (daily liquidity) | ETF-wrapped commodities, listed infrastructure (BIP), BDC ETFs, spot Bitcoin ETFs | 0-10% of portfolio; rebalance-able |
| Tier 2 (annual+ liquidity) | Interval funds, REITs in retirement accounts, private-credit BDCs | 0-5% supplemental; commit capital you don't need |
| Tier 3 (multi-year lockup) | Private equity, venture, hedge funds with quarterly+ gates, direct real-estate ownership | 0-5% only if you have meaningful net worth AND top-tier manager access |
| Tier 4 (effectively illiquid) | Art, collectibles, single-property direct real estate, angel investments | Treat as consumption + tail-bet, not portfolio allocation |
The single highest-leverage allocation decision is whether alts come from your EQUITY sleeve or your BOND sleeve. Replacing equities with alts (selling VTI to buy infrastructure ETF) preserves the equity-risk premium with potentially better diversification. Replacing bonds with alts (selling BND to buy commodities) compromises the liquidity-and-drawdown-buffer role that bonds play. The academic literature (notably Asness on 'It Ain't Easy: Hard Lessons in Asset Allocation') is consistent: alts should come from the equity sleeve at retail scale, not from the bond sleeve.
Beware the marketing of 'institutional-quality' alts to retail. Most retail-accessible private-credit / interval-fund / non-traded REIT vehicles charge 1-3% management fees + 10-20% performance fees vs the 4-6 bp expense ratios on equity index funds. After fees, retail alts have to outperform equities by 2-4% per year just to break even on net returns. That outperformance threshold is hard to clear for most managers. The empirical evidence (Cliff Asness, Andy Lo, Robert Stafford) is that retail-accessible alts have underperformed simple stock/bond portfolios after fees in most multi-year windows since 2010.
Endowment-model alt allocations don't translate to retail because endowment structure doesn't. Retail-appropriate alt allocation is 5-15% across LIQUID forms (ETFs, listed infrastructure, spot crypto, listed BDCs/REITs). Source alts from the equity sleeve, not the bond sleeve. After fees, simple stock/bond portfolios have beaten retail alts in most multi-year windows since 2010 -- choose alts when you can identify a structural diversification benefit, not when marketing promises one.
Sit with the ideas.
A 45-year-old investor with a $2M portfolio wants to add alternative-investment exposure. Current allocation: 70% US equity / 20% international equity / 10% bonds. They're considering a 20% target allocation across alternatives (5% commodities + 5% infrastructure + 5% private credit + 5% Bitcoin). What is the most-likely-to-help adjustment to this proposal?