Charles Schwab, one of the world's largest financial services firms, has released a comprehensive report examining how cryptocurrency allocations can be formalized within diversified portfolios. The analysis, published on April 6, presents two distinct approaches for incorporating Bitcoin and Ethereum, demonstrating that allocation weights are highly sensitive to investor return expectations and risk tolerance.
Traditional Return-Based Model: How Assumptions Drive Weights
The first framework relies on traditional capital market assumptions, including expected return, volatility, and correlation. Under this model, allocations vary dramatically based on subjective return forecasts. For Bitcoin, when expected annual returns are set at just 10%, allocations remain negligible: 0% for conservative portfolios (8% equity/92% fixed income), 1.5% for moderate portfolios (64% equity/36% fixed income), and 1.9% for aggressive portfolios (96% equity/4% fixed income). Raising the expected return to 25% triggers a sharp expansion, with conservative, moderate, and aggressive portfolios allocating 3.1%, 16.9%, and 22.4% respectively. “A moderate investor’s exposure with a 25% expected return from bitcoin implies a 16.9% allocation, versus only 1.5% if the investor expects a 10% return,” Schwab noted.
Ethereum follows a similar pattern but at lower weights due to its higher historical volatility. At a 25% return assumption, Ethereum allocations reach 1.4% (conservative), 8.2% (moderate), and 10.7% (aggressive). Crucially, when expected returns fall below 10%, both Bitcoin and Ethereum receive zero allocation across all portfolio types. Schwab’s analysis states: “Our analysis suggests that neither bitcoin nor ether offers a large enough risk-adjusted return to justify any allocation if return expectations are less than 10%, even for an aggressive investor.”
The study uses Schwab Asset Management capital market expectations as of October 31, 2025, with Bitcoin data from January 1, 2015, to October 31, 2025, and Ethereum data from February 8, 2018, to October 31, 2025.
Risk-Budgeting Framework: Small Allocations, Outsize Impact
The second approach is a risk-budgeting framework that allocates crypto based on its contribution to total portfolio risk, rather than on return assumptions. This method reveals how little capital is required to achieve meaningful crypto exposure. Schwab reported: “It takes only a 1.2% allocation to bitcoin and a 0.9% allocation to ether to reach the 10% risk level.”
Across both frameworks, the report emphasizes that there is no universally “correct” cryptocurrency allocation; the decision remains largely personal. However, Schwab stressed that even small positions can have a disproportionate effect on portfolio performance, making risk-budgeting a useful tool for investors seeking deliberate rather than accidental crypto exposure.
The report arrives as Charles Schwab prepares to roll out dedicated crypto accounts, signaling a deeper integration of digital assets into mainstream investing. As institutional adoption accelerates, such analytical frameworks could help investors navigate the volatile asset class with greater clarity and discipline.