Responsible investing has moved from the margins of Swiss occupational pensions to the centre of board agendas. Most pension funds now have a sustainability policy, many publish an ESG report, and a growing number disclose how they vote. Fewer boards have translated these commitments systematically into the portfolio, asset class by asset class, with a clear view of what each instrument can achieve and at what cost.
The distinction matters because the levers differ. A pension fund that owns a building controls its energy consumption. A pension fund that buys a bond in the secondary market controls very little. Treating responsible investing as a single policy obscures this difference, and it makes the more demanding question, how far a fund should go towards impact, difficult to answer with any precision.
The market data show breadth, and a shift in labelling. Sustainability-related investments in Switzerland rose by 3% to CHF 1,940 billion at the end of 2025 (SSF, 2026). Of the CHF 870 billion in sustainably managed fund assets, only 64% are explicitly marketed as sustainable; for discretionary mandates worth CHF 735 billion, the share is 27%. Demanding disclosure requirements have made providers more cautious about the label than about the practice.
Among pension funds, 48% report under the ASIP ESG Reporting Standard, a share unchanged on the previous year, but the reports submitted now cover 51% of pension fund assets, up from 46% (ASIP & PwC, 2025). Stewardship disclosure has advanced most: 91% of participating funds publish at least some stewardship indicators, up from 54% a year earlier, and 47% have made decarbonisation a binding objective of their investment strategy, up from 38%. Impact has spread quickly, but from a low base. 44% of funds now hold impact investments, against 13% a year earlier (ASIP & PwC, 2025), with an average allocation of around 4.5% of total assets (blue News, 2025).
Impact investing differs from ESG integration and exclusions in three respects: the intention to achieve a measurable social or environmental outcome, the measurement and reporting of that outcome and, more contentiously, additionality, meaning that the outcome would not have occurred without the investment. Kölbel et al. (2020) find that the evidence for investor impact is strongest where capital is scarce or where investors engage directly with companies, and weakest where an investor merely trades listed securities in deep secondary markets.
This has a direct consequence for portfolio construction. Impact is not evenly available across asset classes. It concentrates in private markets, direct real estate and primary lending, where the investor’s capital changes what is financed. Regulation is moving in the same direction: under the proposed revision of the EU Sustainable Finance Disclosure Regulation (SFDR), funds that use the term ‘impact’ would have to pursue a pre-defined, measurable positive impact and disclose the theory of change behind it (Debevoise & Plimpton, 2026).
Ambition varies widely. The Netherlands Advisory Board on Impact Investing has urged Dutch institutional investors to allocate 10% of assets to impact; by its own count, 7% to 8% of Dutch assets under management are already invested in this way (NAB, n.d.). Swiss pension funds, at around 4.5% on average, start further back.
An asset-class view clarifies where effort is rewarded and where it is not. The levers differ in kind, not only in degree.
The pattern is consistent. The closer the investor sits to the financing decision, the more credible the impact claim, and the higher the price in fees, illiquidity and governance effort.
Whether an impact-oriented asset can satisfy BVV 2 on its financial merits alone is an empirical question. A recent c-alm analysis of microfinance addresses it directly (Beiner & Weder, 2026). Microfinance investment vehicles lend around 90% of their assets to microfinance institutions in emerging markets, typically on terms of two to three years. From 2003 to 2025, a currency-hedged index of these vehicles returned 1.3% a year in Swiss francs with volatility of 0.6%, compared with 1.8% and 3.4% for Swiss franc bonds and 3.6% and 8.8% for hedged US dollar emerging market bonds. Write-offs averaged around 0.2% of assets a year and peaked at 0.7% during the pandemic, implying credit quality between BBB and BB.
The authors conclude that microfinance can reasonably be classified as offering a market-consistent return, but their caveats are instructive. From 2013 to 2025 the asset class returned only 0.6% a year, below hedged emerging market bonds. In the end-2023 calculation, currency hedging absorbed about four percentage points of a gross yield of 8.3%. Valuation smoothing understates measured volatility, and dispersion between managers is wide. The study treats microfinance as a stabilising component of fixed income rather than a source of return, and it does not assess social outcomes, where randomised evidence on poverty reduction is mixed (Banerjee et al., 2015).
For pension funds, the binding obligations remain fiduciary. Article 71 BVG and Articles 50 to 52 BVV 2 require investments to be assessed for security, adequate return, diversification and liquidity. Beyond that, Switzerland relies on self-regulation. In June 2024 the Federal Council took note of the industry’s rules against greenwashing, issued by the Swiss Bankers Association, the Asset Management Association Switzerland and the Swiss Insurance Association, and decided against state regulation for the time being (Federal Council, 2024). The Federal Department of Finance is to reassess the need for action once the EU has published its revised SFDR, and by the end of 2027 at the latest (finews.ch, 2024).
That revision is now well advanced. The European Commission presented its proposal in November 2025 and the Council adopted its position in June 2026; negotiations between the EU institutions could conclude around the turn of the year. Depending on the transition period, the new rules would apply from late 2028 or early 2029 (Debevoise & Plimpton, 2026).
Domestic political pressure runs in a different direction. The Finanzplatz-Initiative, which qualified on 28 May 2026 with 108,979 valid signatures, would require financial market participants, explicitly including pension and social insurance institutions, to align their activities with international climate and biodiversity goals (cash.ch, 2026). On 12 August 2026 the Federal Council recommended its rejection without a counter-proposal, warning that it could restrict pension funds’ discretion in investment decisions and narrow their investment universe. The dispatch to Parliament is due by 16 April 2027 (Federal Council, 2026). For now, the decision on how far to go rests with boards of trustees.
The lesson extends beyond microfinance. Responsible investing becomes credible when a board can state, for each asset class, which lever it uses, what it costs and what outcome it expects. Impact is best treated as an allocation decision, tested against the same fiduciary criteria as any other, rather than as a label applied after the fact. With the EU rules still under negotiation, the federal reassessment due by the end of 2027 and the initiative heading for Parliament, boards that document this reasoning now will be better placed to explain their choices to insured members, supervisors and, if required, voters.
ASIP & PwC Switzerland (2025), «ASIP ESG-Reporting-Standard für Pensionskassen: Marktstudie 2025», PwC Switzerland, 18 November 2025 · Banerjee, A., Karlan, D. & Zinman, J. (2015), «Six randomized evaluations of microcredit: Introduction and further steps», American Economic Journal: Applied Economics 7(1), 1–21 · Beiner, S. & Weder, P. (2026), «Mikrofinanz: Kleine Kredite, grosse Stabilität», c-alm AG, 21 August 2026 · blue News (2025), «44 percent of pension funds make impact-oriented investments», 22 November 2025 · cash.ch (2026), «Finanzplatz-Initiative kommt vors Volk», 28 May 2026 · Debevoise & Plimpton (2026), «SFDR 2.0: Recap Briefing», September 2026 · Federal Council (2024), «Federal Council notes financial sector’s progress in preventing greenwashing», media release, 19 June 2024 · Federal Council (2026), «Bundesrat lehnt Finanzplatz-Initiative ab», media release, 12 August 2026 · finews.ch (2024), «Greenwashing: Bundesrat schaut bei Regulierung in Richtung EU», June 2024 · Kölbel, J. F., Heeb, F., Paetzold, F. & Busch, T. (2020), «Can sustainable investing save the world? Reviewing the mechanisms of investor impact», Organization & Environment 33(4), 554–574 · Netherlands Advisory Board on Impact Investing [NAB] (n.d.), «10% Programme», nabimpactinvesting.nl · Swiss Sustainable Finance [SSF] (2026), «Swiss Sustainable Investment Market Study 2026», Zurich, 9 June 2026 · Bundesgesetz über die berufliche Alters-, Hinterlassenen- und Invalidenvorsorge (BVG), SR 831.40; Verordnung über die berufliche Alters-, Hinterlassenen- und Invalidenvorsorge (BVV 2), SR 831.441.1