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Dimensional, Riverbridge and Wellington brief PERS on small-cap performance and strategy
Summary
Three small-cap managers — Dimensional, Riverbridge and Wellington — presented performance and process updates to the investment committee, discussed portfolio construction (factor, fundamental and opportunistic approaches), and answered trustee questions about concentration, leverage and exposure to AI-driven market themes.
Trustees received back-to-back presentations from three of the plan’s small-cap managers: Dimensional Fund Advisors (small-cap value), Riverbridge Partners (small-cap growth) and Wellington Management (small-cap opportunities). Each firm reviewed investment philosophy, implementation details and recent performance drivers.
Lede: Dimensional described a factor-based small-cap value strategy that emphasizes size, value and profitability and excludes REITs; Riverbridge emphasized fundamental, management-focused small-cap growth stock selection; Wellington framed its approach as opportunistic with deep analyst support and robust management engagement.
Nut graf: Managers emphasized different sources of alpha. Dimensional argued disciplined factor exposure with careful implementation and an issuer cap to limit concentration; Riverbridge highlighted management-quality research and long-term fundamental selection as central to outperformance; Wellington emphasized team continuity and cross‑sector analyst support. Across the presentations, trustees asked about narrow-market concentration (AI winners), the impacts of higher short-term rates and how managers adjust implementation in periods when a handful of names dominate market returns.
Representative exchanges: Trustees pressed managers on concentration risk in indexes driven by a few mega-cap technology stocks and asked how managers avoid being forced into crowded positions. Dimensional explained issuer caps and broad diversification, Riverbridge and Wellington discussed security-selection and active engagement, and all described how they evaluate management quality and balance leverage in portfolios.
What’s next: Managers will continue periodic reporting; the investment staff will monitor performance and report back to trustees on attribution and any implementation risks. Trustees took no formal action on manager mandates at this meeting.
