Multi-manager portfolios rest on a simple premise: that a skilled allocator can identify managers who will serve a portfolio well, combine them sensibly and monitor them over time. The premise is sound. The execution is where allocators differ, and the difference often comes down to whether manager selection is treated as a process or as a set of relationships.
Relationships matter in private markets. Access to some managers depends on them, and long familiarity can provide insight. But relationships can also blur judgment. A manager who has been in a portfolio for years can be harder to evaluate objectively than a newcomer, and a strong personal rapport can substitute for evidence.
What a disciplined process looks like
- A written research framework applied to every manager, new or existing.
- Operational due diligence conducted separately from investment due diligence.
- Documented reasons for each hire, and the conditions that would prompt a review.
- Regular monitoring against the original thesis, not just against recent results.
Separating operational from investment diligence deserves emphasis. A manager can have an excellent investment approach and weak controls, or the reverse. Evaluating them separately, by different people, makes it less likely that enthusiasm for one will hide concerns about the other.
“The question is not whether we like a manager. It is whether the evidence still supports the reasons we hired them.”
Portfolio construction is part of selection
A manager is never selected in isolation. Each one changes the shape of the portfolio: its exposures, its concentration, its liquidity. Slate Blue Mosaic considers how each manager fits alongside the others, so that a portfolio does not end up holding the same risks under several different names.
Knowing when to part ways
The hardest decision in manager selection is often the decision to leave. A disciplined process makes it easier by setting, at the time of hiring, the circumstances that would trigger a review: a change in team, a drift in strategy, an operational concern. When those conditions arise, the decision is not a judgment about a relationship. It is the process working as intended.
Perspectives are general information and reflect the views of Slate Blue Capital at the time of writing, which may change without notice. They are not investment, legal or tax advice, do not describe or offer any security, fund or service, and should not be relied on in making an investment decision. See Important information.