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How enhanced indexing strategies can complement your traditional portfolio 

By Pat Magadla, Head of Distribution at Equilibrium
9 April 2025 • 11 min read81 reads

Investors are always seeking new investment opportunities with better risk-adjusted returns. Enhanced indexation is one such strategy, which is superior to passive yet still complementary to a traditional fundamental strategy.  

Lejda Bargjo, Client Portfolio Manager in Quantitative Investing from Robeco, recently joined Equilibrium’s quarterly update from Frankfurt. She shared that over the last few years, the rise of passive investing had some market commentators calling it the demise of active investing. This rationale is illustrated in the graph below by Robeco which shows European active fund allocations diminishing over time, as passive investing increased.  

Source: Robeco, 3 February 2025

The next question is: What has the returns of two different strategies been?   

Active versus passive: Underperformance after costs 

The table below, an overview of the performance of different markets, shows a significant percentage of active funds underperformed the index over various periods.  

Source: Robeco, 3 February 2025

The reality is that several global active managers are underperforming after cost. This highlights the need for good manager selection and diversification across the investment strategy to increase the potential for outperformance. 

Bargjo noted an increase in the concentration risk in the last decade, driven by the AI frenzy.  The chart below illustrates the ‘Magnificent Seven’s’ dominance in the S&P500, which led to higher valuation levels relative to other regions, making the US composite relatively expensive. 

As an active manager, this introduced the risk of underperforming the index should you have avoided the dominant and outsized tech shares. It becomes difficult to outperform the market without exposure to these shares. Similarly, passive managers are exposed to a higher risk, due to the disproportionate reliance on the performance of these companies. 

Source: LSEG Datastream

Enter trilemma 

Another growing theme is the trilemma of solving for return, risk and sustainability, particularly in the growing midst of dissenting sustainability voices. The primary objective of this trilemma or the new efficient frontier is to add return at a reduced risk, while having a positive effect on society or the world.  

Bargjo shared with our clients the backlash against sustainable investing, especially, with the new Trump administration. One of the first presidential executive orders was to take the US out of the Paris Climate Agreement. How to win against this backdrop is to remain consistent and follow disciplined, proven investment processes that remain integrated within one’s modelling.  

Fundamentals will always adapt to changing environments and it remains prudent to follow an evidence-based approach. 

Enter Robeco: The investment engineers 

Robeco is a Dutch-based investment world leader with 30 years of pioneering in both systematic and sustainable investing solutions. Robeco believes every strategy should be research and evidence-driven, removing emotion and biases from investing.  

Equilibrium selected the Robeco-managed Curate Global Sustainable Equity Fund[1] after a rigorous quantitative and qualitative due diligence process, as one of our underlying global funds.   

The inclusion of the fund introduces a low-cost, low-tracking error that follows enhanced indexing strategies in Equilibrium model portfolios. The fund’s objective is to outperform the MSCI World Index, while integrating sustainability in the stock selection. Academic evidence recognises that sustainability integration also leads to improved returns as companies tend to exhibit higher quality traits. This has been evidenced by the actual returns with the fund handsomely outperforming the chosen benchmark.  

Enhanced indexing equities: A smarter alternative to passive investing 

While passive investing merely tracks an index without making changes, enhanced indexing adds subtle active components without fully abandoning passive principles. These adjustments or systematic tweaks aim to generate higher returns than traditional passive investing over time, while aiming to minimise risk.  

The starting position is the index weights, which are then adjusted according to the relative attractiveness. Simplistically, the more attractive constitution would get higher weight while the unattractive ones would get a lower weight. 

Source: Robeco

 Some additional benefits of enhanced indexing include: 

  • Slightly active adjustments for alpha: Small, systematic tweaks to an index or strategy to generate outperformance (alpha).  
  • Cost efficiency: Keeps costs down by avoiding frequent trading and complex research. This results in lower fees and transaction costs, maintaining more of the portfolio’s returns.  
  • Flexibility in risk exposure: Offers flexibility by adjusting the portfolio based on market conditions and factors like value or momentum. The ability to exploit inefficiencies and potentially outperform a passive strategy. 
  • Maintain diversification: Unlike concentrated fundamental strategies, enhanced indexing preserves broad diversification while adjusting portfolio weights. This reduces individual stock risk and captures potential upside missed by passive strategies. 
  • Reduced tracking error: The strategy closely mirrors the index, offering more consistent performance and a predictable risk profile. 

The Curate Global Sustainable Equity Fund, as part of Equilibrium’s portfolios, provides access to Robeco’s superior enhanced indexing strategy, which has benefitted the portfolio since investment through an enhanced return and the added sustainability benefit. Since inception of the mandate, the Robeco-managed Curate Global Sustainable Equity Fund has delivered an outperformance relative to the index of 1.34% annualised. 

At Equilibrium, we are constantly looking at our portfolios and our execution options across the markets. We invest across active, passive, systematic and enhanced indexing strategies.  

Enhanced indexing strategically adjusts the portfolio by tilting towards specific sectors, factors, or securities while maintaining core alignment with the index. This approach blends the best of passive and active investing, thereby improving long-term returns through a cost-efficient, diversified strategy. It complements fundamental analysis and strikes a balance between the stability of passive investing and the potential for excess returns. 

By partnering with Robeco, a fund manager with extensive experience in developing and refining models, Equilibrium offers investors an improved risk-return and cost profile. 

In a dynamic market, where new signals constantly emerge, Robeco’s model adapts, ensuring clients’ portfolios remain future-fit.  

[1] This fund is eligible for investment by the general public as the Financial Sector Conduct Authority has approved the application for solicitation in South Africa.

Equilibrium Investment Management (Pty) Ltd (Equilibrium) (Reg. No. 2007/018275/07) is an authorised financial services provider (FSP32726) and part of Momentum Group Limited, rated B-BBEE level 1.

Collective investments are generally medium to long-term investments. The value of units may go down as well as up and past performance is not necessarily a guide to the future. Collective investments are traded at ruling prices. Commission and incentives may be paid and, if so, would be included in the overall costs. All performance is calculated on a total return basis, after deduction of all fees and commissions and in US dollar terms. The Fund invests in other collective investments, which levy their own charges. Higher risk investments include, but are not limited to, investments in smaller companies, even in developed markets, investments in emerging markets or single country debt or equity funds and investments in high yield or non-investment grade debt. Foreign securities may have additional material risks, depending on the specific risks affecting that country, such as: potential constraints on liquidity and the repatriation of funds; macroeconomic risks; political risks; foreign exchange risks; tax risks; settlement risks; and potential limitations on the availability of market information. Investment in the Fund may not be suitable for all investors. Investors should obtain advice from their financial adviser before proceeding with an investment. This document should be read in conjunction with the prospectus of Momentum Global Funds, in which all the current fees additional disclosures, risk of investment and fund facts are disclosed. This document should not be construed as an investment advertisement, or investment advice or guidance or proposal or recommendation in any form whatsoever, whether relating to the Fund or its underlying investments. It is for information purposes only and has been prepared and is made available for the benefit of the investors. While all care has been taken by the Investment Manager in the preparation of the information contained in this document, neither the Manager nor Investment Manager make any representations or give any warranties as to the correctness, accuracy or completeness of the information, nor does either the Manager or Investment Manager assume liability or responsibility for any losses arising from errors or omissions in the information. This Fund is a sub-fund of the Momentum Global Funds SICAV, which is domiciled in Luxembourg and regulated by the Commission de Surveillance du Secteur Financier. The Fund conforms to the requirements of the European UCITS Directive. FundRock Management Company S.A., incorporated in Luxembourg, is the Management Company with its registered offi ce at 33, Rue de Gasperich, L-5826 Hesperange, Luxembourg. Telephone+352 271 111. J.P. Morgan Bank Luxembourg S.A., incorporated in Luxembourg, is the Administrator and Depositary with its registered offi ce at European Bank & Business Centre, 6, route de Trèves, L-2633 Senningerberg, Luxembourg. Telephone+352 462 6851. This document is issued by Momentum Global Investment Management Limited (MGIM). MGIM is the Investment Manager, Promoter and Distributor for the Momentum Global Funds SICAV. MGIM is registered in England and Wales No. 03733094. Registered Offi ce: The Rex Building, 62 Queen Street, London EC4R 1EB.Telephone+44 (0)20 7489 7223EmailDistributionServices@momentum.co.uk. MGIM is authorised and regulated by the Financial Conduct Authority No. 232357, and is exempt from the requirements of section 7(1) of the Financial Advisory and Intermediary Services Act 37 of 2002 (FAIS) in South Africa, in terms of the FSCA FAIS Notice 141 of 2021 (published 15 December 2021). Either Momentum Global Investment Management Limited (MGIM) or FundRock Management Company S.A., the management company, may terminate arrangements for marketing under the denotifi cation process in the new Cross-border Distribution Directive (Directive EU) 2019/1160”


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