The green multiplier: How finance scales environmental impact

Financial institutions can act as a green multiplier because their financing, insurance, client influence and market power can scale environmental outcomes across the economy.

• Climate finance has more than doubled since 2017, with commercial financial institutions accounting for 28% of flows.
• The article identifies four impact pathways: financing environmental solutions, reducing environmental risks and supporting adaptation, influencing client transitions, and shaping markets through stewardship, exclusions and standards.
• Fifth Third Bancorp has facilitated more than 190,000 residential solar installations and deployed USD 53 billion in sustainable finance, while Standard Chartered has mobilized USD 157 billion for renewable energy and grid infrastructure in emerging markets.
• Insurers can influence adaptation and circularity through risk modelling, pricing and claims practices; MS&AD supports clients facing physical climate risks, Gjensidige promotes repair and reuse, and Munich Re shapes insurance markets through catastrophe modelling and risk capacity.
• Natural disasters caused about USD 224 billion of economic losses in 2025, with just under 50% insured, highlighting the growing protection gap and the role of insurers in resilience.
• Because financial institutions lack a single denominator for environmental contribution, the authors assess aligned lending and investment, sustainable-finance flows, green versus brown financing, environmental outcomes and client-transition influence; Standard Chartered reports USD 157 billion mobilized since 2021, USD 23.4 billion of sustainable assets, more than USD 1 billion of sustainable-finance income and about 4 million tons of annual avoided emissions.

Takeaway: Investors should assess financial institutions through a combination of hard impact metrics and demonstrable influence over clients and markets, rather than relying only on direct attribution or a single sustainability indicator.