Charles Schwab has outlined two portfolio construction approaches showing how bitcoin and ethereum allocations can range from nearly zero to double-digit weights, depending largely on investor assumptions about future returns and risk tolerance. In a report released on April 6, the financial services firm argued that crypto exposure is becoming more formalized in diversified portfolios, but the resulting allocation is highly sensitive to the framework being used.
Return assumptions drive large shifts in portfolio weight
The first framework discussed by Schwab is a traditional allocation model built on expected return, volatility, and correlation assumptions. Under this approach, crypto weights change dramatically as expected returns rise. The firm explicitly noted that allocations are highly dependent on an investor’s subjective view of expected return.
For bitcoin, the differences are striking. When expected return is set at 10%, the recommended allocation is 0% for conservative portfolios, 1.5% for moderate portfolios, and 1.9% for aggressive portfolios. When the expected return rises to 15%, those weights increase to 1.0%, 6.6%, and 8.8%, respectively. In a more bullish scenario assuming 25% returns, bitcoin allocations expand to 3.1% for conservative investors, 16.9% for moderate investors, and 22.4% for aggressive investors.
Schwab highlighted the scale of this sensitivity with a simple comparison: a moderate investor expecting a 25% return from bitcoin would arrive at a 16.9% allocation, versus only 1.5% if that investor expected returns of just 10%. The takeaway is that portfolio outcomes are not being dictated by one fixed institutional view of crypto, but by the assumptions investors bring into the model.
Ethereum follows the same pattern at lower weights
Ethereum shows a similar pattern, though with smaller recommended allocations because of its higher volatility. At an expected return of 15%, ethereum reaches weights of 0.1% in conservative portfolios, 2.0% in moderate portfolios, and 2.5% in aggressive portfolios. When expected returns are raised to 25%, the suggested allocation climbs to 1.4%, 8.2%, and 10.7%, respectively.
Schwab also identified an important floor in the model. If expected returns for bitcoin or ether are at 5% or below, both assets receive 0% allocation across all portfolio types. The report stated that neither bitcoin nor ether appears to offer a sufficiently attractive risk-adjusted return to justify any allocation if return expectations are below 10%, even for aggressive investors.
A risk-budgeting approach shows how small allocations can still matter
The second framework in the report shifts away from expected return assumptions and instead focuses on risk contribution. In this risk-budgeting model, the question is not how much return an investor expects from crypto, but how much of the portfolio’s overall volatility they are willing to assign to it.
Using this approach, Schwab found that only a small capital allocation is needed for crypto to become a meaningful source of portfolio risk. According to the report, it takes just a 1.2% allocation to bitcoin and a 0.9% allocation to ether for each asset to account for 10% of total portfolio risk. This finding underscores the outsized influence of highly volatile assets inside diversified portfolios.
The implication is straightforward: investors do not need a large notional position in crypto for it to materially affect portfolio outcomes. Even relatively small allocations can alter both performance and risk characteristics in noticeable ways.
No single “correct” crypto allocation
Across both frameworks, Schwab’s central conclusion is that there is no universally correct allocation to cryptocurrencies. The firm said the decision is largely personal, shaped by investor conviction, return expectations, and tolerance for volatility. That conclusion may resonate with advisors and portfolio managers attempting to fit digital assets into more conventional asset-allocation processes.
At the same time, Schwab emphasized that crypto should not be dismissed as irrelevant simply because the allocation appears small. The report noted that even small exposures to bitcoin or ether can significantly affect total portfolio performance. That is especially important in diversified portfolios where investors may assume a low single-digit weight is immaterial when, in risk terms, it may be anything but.
Data window and portfolio profiles behind the analysis
The analysis was based on Schwab Asset Management capital market expectations as of Oct. 31, 2025. For bitcoin, the data window ran from Jan. 1, 2015, to Oct. 31, 2025. For ethereum, the sample covered Feb. 8, 2018, to Oct. 31, 2025. Schwab modeled three investor profiles: conservative portfolios with 8% equity and 92% fixed income, moderate portfolios with 64% equity and 36% fixed income, and aggressive portfolios with 96% equity and 4% fixed income.
In these examples, crypto allocations replaced part of the equity allocation rather than being added on top of the existing portfolio. That detail matters because it frames bitcoin and ethereum not as isolated speculative trades, but as competing assets within a broader portfolio optimization exercise.
Schwab’s report does not argue that investors should automatically adopt high crypto weights. Instead, it illustrates how quickly portfolio recommendations can change when assumptions change. For investors and advisors, the message is clear: crypto allocation is no longer just a question of whether to participate, but of how expected returns and risk budgets reshape the role of bitcoin and ethereum inside a diversified investment strategy.