Why family offices should choose conviction over diversification

"We need to diversify" has become the default mantra of every investment committee. Families are not about diversifying. Their investment committees should be about choosing.

Every investment committee seems to end with the same recommendation: diversify more. At Westwick, while we do not disagree with diversification as a principle, we disagree with it as a substitute for conviction.

For example, a family investing across generations does not need exposure to Japanese equities by way of a Nikkei ETF for the sake of diversifying. What they might need is a stake in a Tokyo-based medtech raising capital to secure an international patent — a business they have met, that they believe in, and whose trajectory they can influence. One is averaging. The other is investing.

Families are long-term by construction and strategic by nature. That means conviction, not diffusion. It means internal ratings coherent with the family office's purpose, and the discipline to say no to everything that falls outside them. It also means accepting to be wrong sometimes in exchange for being right over the cycle.

This is what separates family capital from institutional capital. An institution paid on tracking error can accept a bad quarter if the index is down more. A family cannot. Its reference point is not the market — it is its own long-term preservation and growth target. That target is harder than beating a benchmark, and it is met by choosing carefully, not by diversifying widely.

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