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Executive Summary

In March 2025, we argued that investors who want digital assets should put them in the benchmark, size them by risk contribution rather than by notional weight and keep allocations below 20% of total portfolio risk. We also wrote that contribution to risk would vary over time as the asset class evolved. Eighteen months later, we now return to the data to ask how much it has evolved and what that means for allocators. This time, we include a greater focus on institutional portfolios that also incorporate illiquid private and liquid alternative asset classes.

Key Findings

Bitcoin’s return distribution has compressed. Annualized daily volatility has fallen from ~84% in 2017–2019 to ~46% since mid-2024, and the average loss on the worst 5% of days has halved, from -9.9% to -5.0%. This is consistent with the institutionalization we anticipated: deeper derivatives and exchange-traded fund (ETF) infrastructure and a larger base of long-horizon holders. That said, bitcoin remains volatile and prone to large drawdowns; the current era still includes a 53% peak-to-trough decline.

Correlations with traditional assets have retreated from their 2022–2024 highs, but they are regime-dependent. Bitcoin’s correlation to global equities is highest when equities are in a negative regime (roughly 0.4–0.5 since 2020) and lowest when equities are strong (0.1–0.3). For prudent dynamic allocators this implies that funding for digital assets should continue to come from other high-risk assets but also points to their increasingly diversifying quality.

The same 20% risk ceiling now accommodates a 7.5% allocation. In a diversified institutional portfolio (45% global equity, 25% US bonds, 12% private equity, 10% real estate, 8% hedge funds), a 7.5%bitcoin allocation funded pro rata contributes 20% of total portfolio risk. In our 2025 paper, 3% in a 60/40 portfolio contributed 11.4%; today, with volatility bands continuing to shrink, 3% in the same 60/40 portfolio contributes just 6.5%.

Across 12 macro and crypto-specific shocks since 2020, bitcoin’s first-week behavior has been mixed and its two-month recovery has been consistently stronger than equities. In the one true liquidity shock in our sample (COVID-19), bitcoin fell twice as far as equities in the first week and its equity correlation doubled. During the 2023 banking crisis, the 2025 tariff shock and the 2026 US-Iran conflict, bitcoin outperformed equities in the first week as well as over a 60-day period. The direction of each correlation change is explainable by the nature of the event, which implies that allocators can make informed Dynamic Asset Allocation (DAA) decisions for crypto assets based on their macro forecasts.

Risk budgets should be actively monitored. While peak risk contributions have fallen in each successive cycle, the asset class remains prone to volatility spikes. We recommend risk-contribution ceilings as rebalancing triggers, reviewed at least quarterly. The same discipline applies to private and alternative allocations whose risk is understated by smoothed valuations.

How This Paper Is Organized

We follow the logic of an allocator approaching a new asset class. Section 1 asks what bitcoin represents in a portfolio, because sizing depends on the role you expect it to play. Section 2 shows how the asset’s statistical character has evolved, because those figures are the core inputs into allocation formulas. Section 3 applies our risk-contribution framework to a diversified institutional portfolio and reconciles the result with our 2025 paper. Section 4 tests the framework against real shocks. Section 5 covers monitoring and rebalancing. A sidebar outlines further ideas for the digital asset sleeve itself. The Notes and Index Definitions section at the end covers the data points mentioned throughout this paper.



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