Sustainable Funds Outperformed Traditional Peers in First Half 2026

Sep 10, 2026

Sustainable funds delivered stronger returns than traditional funds in the first half of 2026, though inflows remained subdued. Insights from the most recent “Sustainable Reality” report from the Morgan Stanley Institute for Sustainable Investing explain how.

Key Takeaways

  • Sustainable funds returned a median 4.9% in the first half of 2026, compared with 4.0% for traditional funds, aided by greater exposure to equities.
  • Sustainable fund assets under management (AUM) rose 4.8% to a record $4.24 trillion as of June 30, 2026.
  • Sustainable funds attracted $38 billion in net inflows, but this slowed in the second quarter. 

After slightly underperforming in the second half of 2025, sustainable funds rebounded in the first half of 2026, according to a new “Sustainable Reality” report from the Morgan Stanley Institute for Sustainable Investing. Sustainable funds delivered a median return of 4.9% versus 4.0% for traditional funds.

Sustainable Funds Outperform Traditional Peers in 1H 2026

Source: Morgan Stanley Institute for Sustainable Investing analysis of Morningstar data as of August 8th, 2026.  

 

Greater exposure to equities helped drive the outperformance: 56% of sustainable funds are invested in equities versus 41% for Traditional. The median Sustainable equity fund return of +9.0% in the 1H26 was sufficient to offset the weaker performance in other asset classes including –1.3% for Sustainable fixed income funds.

 

Source: Morgan Stanley Institute for Sustainable Investing analysis of Morningstar data as of August 8, 2026. Note: bps stands for basis points; 10 bps is 0.1%. *Other includes multi-asset, property, commodities and alternative fund types. 

 

Sustainable funds outperformed in all four major investment regions in the first half of 2026. The Americas and Asia-Pacific (APAC) showed particular strength, offsetting lower median returns in funds with global or European mandates – despite the fact that nearly 70% of sustainable funds invest globally or in Europe, compared with less than 39% of traditional funds.

 

Sustainable Funds Performed Strongly in the Americas and APAC

Source: Morgan Stanley Institute for Sustainable Investing analysis of Morningstar data as of August 8, 2026. The Sustainable Reality series shows returns in U.S. dollar terms. 

 

Sustainable funds also continue to outperform over the long term: A hypothetical $100 investment into a sustainable fund in December 2018 – the start date for Morningstar’s sustainable fund classification– would have grown to $171 today, while investing $100 into a traditional fund over the same period of time would have become $159 today, assuming median returns were achieved in each period.

 

Source: Morgan Stanley Institute for Sustainable Investing analysis of Morningstar data as of August 8th, 2026. *Past performance is no guarantee of future results. December 2018 is the start point as Morningstar’s sustainable fund classification started in January 2019. This chart applies the median fund return for the full universe of Sustainable and Traditional funds (as shown on p.9) in each half-year period to a hypothetical $100 investment starting in December 2018.

 

Sustainable Fund Flows Recover but Trail Peers

Sustainable funds attracted $38 billion in net inflows in the first half of 2026, equal to 0.9% of assets under management at the end of 2025. Most of those inflows occurred in the first quarter, with just $4 billion added in the second. Although flows improved from the outflows recorded in the second half of 2025, they continued to trail traditional funds, which added inflows amounting to +2.5% of prior year-end AUM in the first half of 2026.

 

As such, sustainable funds’ share of total fund assets fell to 6.1%, down from a peak of 7.2% in June 2023.

 

Source: Morgan Stanley Institute for Sustainable Investing analysis of Morningstar data as of August 8, 2026.

 

Looking at regional trends, funds domiciled in Europe had the strongest half year, with net inflows at +1.2% of prior year-end AUM, with most inflows in the first quarter. Funds designated as Article 9 under Europe’s Sustainable Finance Disclosure Regulation (SFDR) recorded small inflows in the second quarter, ending a ten-quarter run of outflows. North America-domiciled funds recorded inflows of $3.1 billion, or +0.4% of prior year-end AUM, ending more than three years of outflows. Funds domiciled in Asia lagged, with outflows of -5.5% of prior year-end AUM in the first half. 

 

Source: Morgan Stanley Institute for Sustainable Investing analysis of Morningstar data as of August 8th, 2026.

Read the “Sustainable Reality” Report

Read the full analysis of sustainable and traditional funds in the first half of 2026.