BlackRock research finds small Bitcoin allocations improved portfolio returns

BlackRock has published new research showing that small allocations of Bitcoin in traditional investment portfolios historically improved returns while only slightly increasing risk.

The firm analyzed how adding Bitcoin affected a standard 60/40 portfolio, which splits investments between 60% stocks and 40% bonds. The study covered a 10-year period ending in May 2026.

Key numbers from the analysis

• A traditional 60/40 portfolio returned about 9.9% annually with 10.1% volatility.
• Adding 1% Bitcoin increased annual returns to roughly 10.9% with 10.3% volatility.
• A 2% Bitcoin allocation raised annual returns to about 11.8% with 10.6% volatility.
• The portfolio's Sharpe ratio, a measure of risk-adjusted return, improved from 0.81 to 0.96 with 2% Bitcoin.

Why BlackRock focuses on 1-2%

This isn't the first time BlackRock has highlighted this allocation range. Earlier research found that a 1-2% Bitcoin allocation contributes a similar share of portfolio risk as a single large technology stock in a traditional portfolio. Beyond 2%, Bitcoin's contribution to overall portfolio risk begins to grow disproportionately.

The new analysis approaches the question differently by examining what investors historically received in return for taking on Bitcoin's additional risk. The results suggest the extra return compensated for the added volatility at these allocation levels.

Real-world demand for Bitcoin exposure

BlackRock's research comes as its iShares Bitcoin Trust (IBIT), a type of exchange-traded fund (ETF) that tracks Bitcoin's price, has grown rapidly. Launched in January 2024, IBIT accumulated over $50 billion in assets within a year, making it what BlackRock calls the largest ETP launch in history.

As of the report, U.S. spot Bitcoin ETFs collectively hold approximately 1.25 million Bitcoin, representing nearly 6% of Bitcoin's fixed 21 million supply. IBIT alone accounts for roughly 775,000 Bitcoin, or more than 60% of the Bitcoin held across all U.S. spot ETFs.

What the research means

The analysis suggests that Bitcoin's unique characteristics—such as its fixed supply and decentralized structure—make it behave differently from traditional assets. While Bitcoin can move with other risk assets during market stress, these correlations have historically been temporary rather than permanent.

BlackRock emphasizes that the appropriate Bitcoin allocation depends on an investor's liquidity needs, time horizon, governance constraints, and risk tolerance. The research provides a framework for evaluating Bitcoin based on its marginal impact on portfolio risk and return rather than its standalone volatility.

Sources

• Bitcoin Magazine