ESG screening positively impacts portfolio performance, new research from Amundi finds

United Kingdom,

  • Popularity of active and passive ESG investing boosted by increasing institutional demand
  • 2014 marks a turning point with ESG screening driving outperformance in developed equities with a strong impact on Environmental in North America and Governance in the Eurozone
  • Mobilisation of investors on ESG issues is starting to impact supply and demand, with a subsequent effect on stock prices since 2014


London, January 14, 2019 – Amundi, Europe’s largest asset manager and a pioneer in responsible investment, researched the impact of environmental, social and governance (‘ESG’) criteria on portfolio performance. The purpose of the research was to determine whether being an ESG investor had an impact on portfolio performance.


Following growing demand for ESG investing from institutional clients worldwide, Amundi has used proprietary data from 2010-2017 to analyse the performance of 1700 companies across five investment universes, corresponding to MSCI indices: MSCI North America, MSCI EMU, MSCI Europe-ex EMU, MSCI Japan and MSCI World.


By analysing the performance and ESG criteria (E,S,G and composite ESG scores) of companies, Amundi found that the impact of ESG screening on return, volatility and drawdown is dependent on three factors: observation period, investment universe and investment strategy. Findings indicated that during the study period, the impact of ESG screening had little impact on portfolio risk (volatility and drawdown). On the contrary, the impact of ESG screening was crucial in terms of portfolio returns.


In general, ESG investing tended to penalise both passive and active ESG investors between 2010 and 2013. Contrastingly, ESG investing was a source of outperformance from 2014 to 2017 in Europe and North America. For example, buying the best-in-class (or 20% best-ranked) stocks and selling the worst-in-class (or 20% worst-ranked) stocks would have generated an annualised return of 3.3% in North America and 6.6% in the Eurozone during the 2014-2017 period, while these figures were respectively -2.70% and -1.20% between 2010 and 2013. Across the three ESG pillars, the environmental factor in North America and the governance factor in the Eurozone performed the strongest. From 2015, the social component improved significantly and has now been positively priced by the stock market. Overall, the study revealed that ESG does not impact all stocks, but tends to impact best-in-class and worst-in-class assets.


The causal mechanism lies on demand and supply dynamics, as well as the virtuous circle created by the intrinsic added value of ESG screening. Impact on performance is driven by increasing investors’ demand for ESG approaches, which generates flows into best-in-class stocks, which in turn boosts stock prices and performance. With momentum growing (12% annual growth rate on average[1]), this trend is expected to continue.

The previous results are also valid when considering passive management with exactly the same findings in terms of impact of ESG screening on portfolio returns. Combining an ESG approach within a passive management framework is compatible, as far as investors accept additional, yet controlled, tracking error compared with market capitalization-weighted indices.

In October this year Amundi announced a three-year action plan to increase its commitment to responsible investment. By 2021, ESG analysis will be integrated across all Amundi funds and initiatives promoting investment in projects with an environmental or social impact. By improving and developing ESG research, Amundi is convinced that it will help investors to better understand the big issues on ESG investing.


Thierry Roncalli, Head of Quantitative Research, explained: “This new scientific research confirms the time-varying dynamics of ESG performance. Since stock prices reflect supply and demand balance, our research shows that ESG screening has influenced stock market performance. It is apparent that ‘extra-financial’ ESG risks have become financial risks and that asset pricing momentum is in favour of ESG investors.”


Vincent Mortier, Group Deputy CIO, said: “Our research confirms that ESG integration generates a tangible impact on equity performance in Europe and North America. By favouring a best-in-class ESG approach, investors are able to benefit from an investment strategy that improves long-term performance of the portfolios.”





The research is based on quantitative data from January 2010 to December 2017 using ESG metrics provided by the Amundi ESG Research department. For each company, the overall ESG score and the ratings for the environmental, social and governance categories were assessed by Amundi ESG analysts, who rated each stock using a scoring system relying on the data of four external providers. Amundi ESG analysts reviewed and finalised the final score of each company.



The comprehensive research “The Alpha and Beta of ESG Investing” and the companion summary paper “How ESG Investing Has Impacted the Asset Pricing in the Equity Market?” have been published on Amundi’s Research Centre website:




  1. ^ [1] Source: Global Sustainable investment alliance report 2017

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About Amundi

About Amundi

Amundi, the leading European asset manager, ranking among the top 10 global players[1], offers its 100 million clients - retail, institutional and corporate - a complete range of savings and investment solutions in active and passive management, in traditional or real assets. This offering is enhanced with IT tools and services to cover the entire savings value chain. A subsidiary of the Crédit Agricole group and listed on the stock exchange, Amundi currently manages more than €1.9 trillion of assets[2].

With its six international investment hubs[3], financial and extra-financial research capabilities and long-standing commitment to responsible investment, Amundi is a key player in the asset management landscape.

Amundi clients benefit from the expertise and advice of 5,400 employees in 35 countries.

Amundi, a trusted partner, working every day in the interest of its clients and society 



  1. ^ [1] Source: IPE “Top 500 Asset Managers” published in June 2022, based on assets under management as at 31/12/2021
  2. ^ [2] Amundi data as at 31/12/2022
  3. ^ [3] Boston, Dublin, London, Milan, Paris and Tokyo

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