Bitcoin's Role in a Stock Portfolio: Diversifier, Not a Hedge
A review of Bitcoin's portfolio role finds it has often fallen more than equities during major market stress and its correlation with stocks is unstable. A Fidelity backtest from 2016 to 2025 showed that adding a 1% Bitcoin allocation to a 60/40 portfolio raised annual returns from 9.44% to 11.25%, with only a small increase in volatility. The article concludes Bitcoin can act as a conditional diversifier and source of rebalancing opportunities, but not as portfolio insurance.
A Fidelity study covering 2016 through 2025 found that a 60/40 portfolio with a 1% Bitcoin sleeve returned 11.25% annually, versus 9.44% without it. Volatility edged up from 10.26% to 10.65%, a modest change relative to the return difference.
Bitcoin's hedging record is weaker. During three of four major equity drawdowns since 2020, it lost more than stocks. Its stock correlation has varied across regimes, sometimes positive, sometimes near zero, sometimes negative. Its round-the-clock trading and sharp swings may offer signals and rebalancing chances.
The findings could shape how retail investors, retirement savers, and financial advisers think about small crypto allocations. Some may add Bitcoin for diversification or return potential, while others may reassess claims that it protects during equity selloffs. Because its stress behavior has been inconsistent, investors who treat it as insurance may face unexpected losses. Advisers may need clearer risk disclosures, and broader adoption could tie household finances more closely to crypto volatility.