As traditional 60/40 portfolios face challenges from high interest rates, large deficits, and geopolitical uncertainty, BlackRock suggests evolving asset allocations by incorporating alternatives like liquid alts, gold, and bitcoin. Their Target Allocation model portfolios follow a structured process—sourcing, screening, and sizing—to thoughtfully reconfigure bond-heavy portfolios for modern conditions. 

This involves reducing standard bond exposure in favor of bond-like alternative strategies such as market neutral or merger arbitrage, while preserving resilience in recessionary scenarios. 

Screening over 500 liquid alt funds, BlackRock emphasizes operational quality, performance consistency, and true diversification potential before inclusion. Ultimately, portfolio sizing is optimized to align with investor risk profiles, often making alternatives a significant component—up to half of the fixed income portion in balanced portfolios—while adjusting for more conservative or aggressive strategies.

Gold and bitcoin, though more volatile, should be considered for diversification, with gold typically replacing bonds and bitcoin funded from equities.