Core-satellite approach: A framework for portfolio diversification

Potential benefits of the core-satellite approach

The core-satellite approach can offer a structured way to combine broad exposure with targeted allocations, but it also introduces trade-offs. Here are the main advantages to keep in mind when considering whether this approach fits your goals, time horizon and risk tolerance.

Broad diversification

This strategy may reduce concentration risk by spreading investments across diverse asset classes, sectors, and geographies. The core holdings may provide broader exposure than concentrated positions while satellite assets can add exposure to areas such as emerging markets, niche sectors or alternatives, which may also increase volatility. Diversifying in this way may reduce the impact of downturns in a single holding or segment, supporting a more diversified exposure profile.

Cost efficiency

Passive investments in the core are often lower cost than actively managed funds, due to minimal trading and management fees, although costs vary by product and provider. Lower fees can reduce the drag on long-term returns, all else equal, especially when compounded over years. Satellites can introduce higher costs, but keeping their allocation small can help limit the effect of higher-cost satellite holdings on total portfolio costs. Combining the two enables investors to manage costs while keeping room for targeted allocations.

Potential for outperformance

Satellite investments may be used to seek returns above a benchmark. By focusing on market trends, inefficiencies, or high-growth sectors, the satellite portion can increase return potential, although it can also increase the risk of underperformance. For example, actively managed funds targeting renewable energy or emerging technologies could potentially deliver superior results, alongside core holdings, but may also lag the benchmark or broader portfolio.

Stability during market volatility

The core portion acts as an anchor during periods of market turbulence. Index funds or ETFs tracking broad benchmarks like the S&P 500 or FTSE 100 provide broad market exposure, which may reduce the effect of satellite underperformance, although core holdings can also fall in value. This structure may make the portfolio less dependent on any single satellite position, even when satellite investments face short-term challenges.

Flexibility for customisation

One feature of the core-satellite strategy is its ability to be customized. Investors can tailor the mix of core and satellite investments to match their unique goals and risk-tolerance. Conservative investors may lean toward an 80-20 allocation, prioritising stability, while aggressive investors might opt for a 60-40 split to capture greater growth potential, while accepting higher volatility and loss risk.

How to build a core-satellite portfolio

Creating a core-satellite portfolio requires planning and thoughtful consideration to align with your financial goals and risk tolerance.

Common considerations include the following:

1. Assess your risk tolerance and goals

Begin by defining your investment objectives and risk appetite. Determine whether your priority is long-term growth, income generation, or wealth preservation. Understanding your financial goals helps you decide the appropriate allocation ratio between the core and satellite components, such as a conservative or a more aggressive split.

2. Select core investments

The core portion often consists of passive, low-cost investments that provide broad market exposure and reduce reliance on single securities or sectors. Options include index funds and ETFs tracking benchmarks like the FTSE 100 or S&P 500. These holdings form the foundation of your portfolio, delivering steady returns and reducing overall volatility, although they can still fall in value and may not reduce volatility in all market conditions.

3. Add satellite investments

The satellite portion may increase return potential by targeting specific sectors, regions, or themes. Consider actively managed funds, thematic ETFs, or individual stocks linked to specific sectors, themes or regions, such as renewable energy, technology, or small-cap equities. Keep the satellite allocation smaller to limit the portfolio’s exposure to higher-risk positions.

4. Decide your desired allocation

Choose an allocation ratio that reflects your risk tolerance and investment strategy. For instance:

• 80-20 for conservative investors. A larger core allocation may suit investors who prefer lower exposure to satellite positions.
• 70-30 for balanced portfolios. This gives more room to satellite holdings while keeping the core as the larger allocation.
• 60-40 for aggressive investors. A larger satellite allocation increases exposure to targeted areas and may also increase volatility and loss risk.

Disclaimer: These ratios are illustrative and should not be treated as default allocations.

5. Monitor and rebalance regularly

Market fluctuations can change your portfolio's allocation over time, moving it away from the intended allocation. Periodic reviews can help you maintain the desired balance between core and satellite components. Rebalancing can help move the portfolio back toward its intended allocation and continues to meet your risk and return objectives.

6. Manage costs

Managing fees can reduce the drag of costs on returns. Opt for low-cost passive funds in the core and consider the impact of taxes based on local rules and personal circumstances. Reducing unnecessary expenses ensures that more of your investments work toward your investment goals.

Conclusion: Using core and satellite holdings in portfolio construction

The core-satellite strategy broad core exposure with smaller targeted allocations, creating a versatile framework for modern investors. With a foundation of low-cost core investments complemented by targeted satellite holdings, this approach can help structure risk and return exposure, although outcomes depend on the holdings selected and market conditions.

This strategy may be adapted to different objectives, but appropriateness depends on each investor’s circumstances, risk tolerance and time horizon. Regular portfolio monitoring and rebalancing can help keep the allocation closer to the intended structure.