For the Office Stewarding Generations of Capital, Not Quarters
The analytical instrument for offices that combine the time horizon of an endowment with the discretion of a family.
The family office occupies an unusual analytical position. The time horizon is generational, not quarterly; the mandate is preservation as much as growth; the universe of holdings is broader than that of a typical fund, often spanning operating businesses, real estate, private investments, and listed portfolios. The available tools are typically designed for one of these dimensions only. Drusus is built for the listed-portfolio component, and is designed to fit alongside the legal, tax, and operating advisors that handle the rest.
What You Will Use Most
- The AI analyst chat, for the unhurried analytical work that long-horizon stewardship invites.
- Monte Carlo scenario modelling, calibrated for multi-decade projection rather than the shorter horizons of a fund.
- Drusus Daily, as the structural basis for the principal's daily read.
- Cross-market coverage, which suits the international diversification that most family offices maintain.
On Discretion
Family offices, properly, do not advertise their composition or their dispositions. Drusus retains the analytical record under your account; it does not share holding data with third parties, does not condition advertising, and does not aggregate user data in ways that would compromise the discretion that is the office's core service to its principals. The relevant operational detail is set out in the Security and Trust page.
How They Use Drusus
The shape of a typical working pattern for this audience.
Generational projection
Run Monte Carlo simulations on the listed portfolio over 30 or 50-year horizons. The output makes visible the trade-offs the principal is implicitly accepting.
Liquidity ladder
For the listed portion of the office, map the liquidity profile and stress it against drawdown scenarios. The exercise informs the buffer that the office should maintain against unforeseen calls.
Quarterly principal brief
Many offices produce a quarterly written brief for the principal. Drusus provides the verified market context that anchors that brief, freeing the office staff to focus on the office-specific analysis.
Adviser-coordination memos
Where the listed portfolio interacts with tax planning, real-estate strategy, or generational structuring, Drusus produces the analytical underpinning that the office's advisers can build on.
An Illustrative Query
The form a typical interaction with the Drusus AI analyst takes for this audience.
Project the value of a portfolio comprising 50 per cent global equity, 30 per cent investment-grade fixed income, 10 per cent gold, and 10 per cent cash, over a 30-year horizon, assuming 3 per cent annual withdrawals indexed to UK CPI. What is the probability of capital preservation in real terms, and what are the principal risks?
Across 10,000 simulated paths drawn from the historical return distribution since 1900, with rolling correlation and realistic inflation modelling, the probability of preserving real capital at the 30-year horizon is 68.4 per cent. The probability of capital exhaustion before year 30 is 4.1 per cent. The principal risks are two. First, a regime of sustained negative real returns on the fixed-income allocation, which the historical record establishes as possible in inflationary decades (the 1970s being the canonical example). Second, a sequence-of-returns risk concentrated in the first ten years: a 25 per cent drawdown in years 1 to 5, with the indexed withdrawal continuing, produces a meaningfully worse 30-year outcome than the same drawdown in years 20 to 25. If preservation in real terms is the binding constraint, the modelling supports a higher equity weighting at the expense of nominal fixed income, with the gold and cash allocations retained as crisis-period buffers.
Recommended Tier
Drusus Strategist at £79 per month is the appropriate tier for a single-family office or a multi-family practice operating at a modest scale. It includes Monte Carlo simulation with the long horizons family-office work requires. For larger multi-family practices with several investment professionals, Drusus Institution at £299 per month per user provides the priority support and highest-grade model that institutional scale warrants.