Stewardship is a longer, quieter obligation: the responsibility to make decisions today that a family will still be glad of in ten or twenty years, whatever markets happen to do in the interim. This autumn has given that distinction a practical edge, because the rate backdrop that many long-term plans were built on has changed.

As recently as December 2025, futures markets were pricing two Federal Reserve rate cuts for 2026. Instead, on 16 September the Fed raised its target range by 25 basis points to 3.75–4.00%, its first rate rise since 2023, by a unanimous vote. The minutes, published on 7 October, record that most participants judged a further increase would probably be appropriate by the end of the year, while stressing that no decision was predetermined. At its subsequent meeting on 28 October, the Fed maintained its target range at 3.75–4.00%, although two members favoured a further 25-basis-point increase.

Longer-dated yields have moved further still. Between 1 and 14 October, the US ten-year Treasury yield closed between 5.19% and 5.31% on every trading day, peaking on 5 October, according to the US Treasury's daily yield curve data. In the UK, the thirty-year gilt yield briefly broke through 6% on 1 October, its highest level since early 1998. Nobody can say with confidence where rates go from here, and the swing from expected cuts to a live possibility of further rises is itself the lesson. A plan that only works if rates behave as forecast is not a plan; it is a forecast.

The first place a change in rates tests a family's capital structure is liquidity. Commitments to private funds are promises to provide cash on dates the investor does not control, and those promises are easiest to keep when distributions from earlier commitments are arriving. Bain's 2026 Private Equity Outlook shows how far that cycle has slowed: distributions ran at 14% of net asset value in the twelve months to the third quarter of 2025, the lowest since 2008–09 and below 15% for four years in a row. Around 32,000 unsold companies, worth roughly $3.8 trillion, were still held at the end of the second quarter of 2025, and the average holding period at exit has stretched to about seven years, against five to six in 2010–2021.

The semi-liquid end of the market shows the same pressure from the other side. In the third quarter, investors in Blackstone's BCRED, the $77.2bn fund Bloomberg describes as the world's largest private credit fund, sought to redeem approximately 10% of its shares, equivalent to $4.3bn, against a quarterly cap of 5%. Blackstone estimated that investors who requested redemption of all their shares in both the second and third quarters would have received approximately 75% of their requested capital. The cap operated in accordance with the fund's terms. Yet the episode illustrates the practical limitations of liquidity in vehicles of this kind: investors may receive only part of their requested capital within a given redemption window. For a family, the stewardship question is whether its other assets could cover capital calls, tax obligations and ongoing expenditure if distributions slowed and redemption requests were only partially met, and whether that contingency had been planned for in advance.

Higher rates also change what an illiquid commitment has to earn. The rise in ten-year US Treasury yields has increased the opportunity cost of locking capital into private investments. While government bonds remain exposed to market risk if sold before maturity, they offer a degree of liquidity and flexibility that private investments generally do not. This does not make private markets less attractive in themselves.

Periods like this tend to test the way decisions are made at least as much as the decisions themselves. UBS's Global Family Office Report 2026, which draws on 307 family offices, found that fewer than half have formal governance frameworks with board-level oversight, and only 35% have a defined succession plan for the family office itself. The same report found 60% planning changes to strategic asset allocation over the next twelve months, the highest level UBS has recorded. Changing a long-term allocation in a volatile year is not necessarily wrong, but doing so without an agreed rule for who may authorise it, and on what evidence, is how short-term anxiety quietly rewrites long-term intention. As Morgan Lewis noted in its September 2026 note on family office governance, informal decision-making can create significant vulnerabilities, and the absence of a governance framework threatens continuity at moments such as death, incapacity or a family dispute. Advisory boards and investment committees that include independent, non-family expertise are one way to address it.

The practical response is modest and sits entirely within a family's control. It means a written statement of what the capital is for; a liquidity buffer measured in months and sized on the assumption that distributions slow; a stated hurdle for new commitments set against current risk-free yields; and a rule, agreed in a quiet week, for what triggers a rebalance and who may depart from policy. A rule agreed in calm conditions costs nothing. The same rule drafted during a sell-off costs a great deal.

Much of this is adjustment rather than overhaul. Liquidity reserves and return hurdles should be reassessed in light of prevailing interest rates, expected cash flows and upcoming obligations. Long-term strategic allocation, however, should remain anchored in the family's objectives and investment horizon, rather than short-term market movements. Genuine stewardship is not about avoiding risk in uncertain markets.

It is about taking the right risks deliberately, inside a structure robust enough that a wrong guess about near-term conditions does not derail a multi-decade plan.

If it has been some time since your own liquidity, hurdle rates and decision rules were tested against today's conditions, that is a conversation worth having with your Arbra adviser now, rather than after the next shock.