Core-satellite investing
What is Core-satellite investing?
Core-satellite investing combines a broadly diversified core portfolio with smaller satellite positions used to express active views or obtain specialist exposures.
Why it matters
The approach separates low-cost market exposure from higher-conviction or specialized decisions. A stable core can provide broad diversification and benchmark-like behavior, while satellites pursue additional return, income, downside protection, or exposure to themes and asset classes not represented adequately in the core.
How it works
The core usually receives most capital and may consist of diversified index funds or systematic strategies. Satellites can include active funds, individual securities, factors, regions, alternatives, or tactical positions. The investment policy should define the purpose, maximum size, evaluation benchmark, liquidity requirements, and review conditions for each satellite.
Example
An investor might place 75% in global equity and bond index funds, then allocate 10% to small-cap value, 10% to an active emerging-markets manager, and 5% to listed infrastructure. The satellites should be assessed both individually and for how their underlying exposures change the combined portfolio.
How to interpret it
A satellite should have a clear role that the core does not already provide. Look-through analysis is essential because an active fund may simply duplicate core holdings at a higher fee. Measure satellite performance against an appropriate benchmark and determine whether any excess return compensates for additional risk, cost, and complexity.
Limitations
Adding too many satellites can turn a simple framework into an expensive, overlapping portfolio. Small allocations may not affect outcomes enough to justify monitoring, while large ones can undermine the stability of the core. The core itself also needs review because broad indexes can become concentrated or misaligned with the investor's objectives.
Practical checklist
Define the core benchmark and maximum combined satellite allocation. Give every satellite a written objective, comparison benchmark, expected holding period, cost budget, and exit condition. Use look-through analysis to identify overlap and aggregate factor, sector, country, and currency exposure. Review whether each satellite has changed total portfolio outcomes enough to justify its complexity. Remove positions whose original role is duplicated or no longer relevant. Report core and satellite contributions separately so accountability remains clear over time.
Also known as: core and satellite investing