Energy Investment Ratios Shifted Toward Low-Carbon Assets
Public market funds reached an 0.8 clean-energy-to-fossil-fuel ratio by the end of 2025, signaling changes for investor portfolios.
Updated on Sept. 25, 2026 in Investing
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At the end of 2025, public market funds invested 80 cents in low-carbon energy for every $1 directed toward fossil fuels. This shift reflects broader trends in how major asset managers allocate capital across more than 85,000 funds.
Why it matters
The rise in this ratio occurred because lower-carbon companies are increasing debt to fund high upfront costs for wind and solar projects. Consequently, portfolio companies have prioritized low-carbon capital expenditures over traditional fossil fuel spending.
The Energy Supply Fund Ratio reached 0.8 at the end of 2025, up from 0.73 in early 2024. While credit funds now enable $1.20 of low-carbon expenditure for every $1 in fossil fuels, equity funds maintain a lower overall ratio of 0.7.
The players
Vanguard
An investment management company that provides low-cost mutual funds, ETFs, and retirement services to millions of households.
BlackRock
A global investment manager that offers a wide array of exchange-traded funds and financial products for individual and institutional investors.
The details
Asset managers influence these capital flows by managing large-scale indexed, mutual, and private market funds. Because wind and solar projects require significant initial outlays, companies in the low-carbon sector rely on credit markets to finance infrastructure, including $36 billion in recent fund-enabled spending for power grids. Vanguard and BlackRock currently enable more energy-related capital expenditure than the remaining top 10 largest managers combined.
Timeline
The clean energy to fossil-fuel ratio was 0.73 at the beginning of 2024.
Changes to S&P 500 index components caused its ratio to decrease in 2025.
The global ratio reached 0.8 by the end of 2025.
Money Landscape
This growth in the clean energy expenditure ratio reflects a multi-year shift in how institutional investors allocate capital to align with infrastructure needs. It follows a pattern set by international policy frameworks that encourage private investment in low-carbon transition projects.
Households invested in diversified mutual funds or ETFs may see their portfolio's underlying exposure change as managers adjust capital expenditure ratios. You should review your fund prospectuses or talk to a financial professional to understand your fund's exposure to low-carbon versus fossil fuel assets.
The takeaway
The trend toward higher clean energy investment is being driven by the significant borrowing needs of infrastructure-heavy green projects. Investors should regularly review their fund's latest performance reports to see how these systemic shifts in capital allocation might affect their specific holdings.
Further reading
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Source note: This article includes information reported by BloombergNEF.
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