Carbon Market Watch — 2026-05-29
EU carbon prices climbed to EUR 79/tonne in late May amid optimism over a potential UK-EU market link and ongoing ETS reform discussions, as six countries push back against proposed free allowance cuts. Meanwhile, a Bloomberg investigation exposed dubious Chinese carbon credits circulating in European voluntary markets, raising questions about offset quality and verification standards.
Carbon Market Watch — 2026-05-29
EU ETS Price Update
EU carbon allowances reached EUR 79 per tonne in late May 2026, marking a significant recovery driven by optimism surrounding a potential EU-UK carbon market link and positive signals on ETS reform. The market gained approximately 6% in May, bolstered by discussions of deeper integration between the two systems. Trading volumes have remained steady as market participants await clarity on structural reforms to the system.
The price surge reflects investor confidence in the bloc's commitment to climate policy, though concerns about industrial competitiveness persist.

Compliance Markets Roundup
EU ETS (European Union): EUR 79/tonne as of late May 2026, up 6% over the month. Six member states have formally urged the European Commission to reconsider proposed cuts to free allowances, citing excessive burden on energy-intensive sectors (steel, cement, chemicals, aluminium). The reform debate continues to dominate policy discussions.
UK ETS: UK allowances have risen in tandem with EU prices, driving renewed interest in potential market linkage mechanisms between London and Brussels. The bloc views deeper integration as a pathway to enhance price signals and trading liquidity.
Aviation (EU & UK): Airlines face a critical transition as free allowances in both EU and UK systems will end in 2026, pushing carriers to purchase all emissions permits at market rates. Analysis estimates significant cost increases for the sector, as airlines previously benefited from substantial free allocation pools.

Voluntary Carbon Market
Offset Quality Crisis: A Bloomberg investigation has identified a critical integrity problem in voluntary carbon markets: companies in at least nine European countries purchased carbon offsets from projects that appear not to exist or were verified by auditors with undisclosed conflicts of interest. The investigation found auditor-to-developer revolving doors, undermining the credibility of offset certification.
Credit Standards: Verra-certified credits remain the dominant standard in voluntary markets, though scrutiny of Chinese-origin projects has intensified. Gold Standard credits continue to attract demand from corporate buyers seeking higher additionality guarantees and sustainable development co-benefits.
Regional Integration: Efforts to integrate North American carbon credit markets—linking Canada, the US (including RGGI and California), and Mexico—are advancing, with proposals for shared standards and cross-border infrastructure to improve market efficiency and offset quality.
Policy & Regulation
EU Carbon Border Adjustment Mechanism (CBAM): The EU's CBAM entered its definitive phase on January 1, 2026, with steel, aluminium, cement, fertiliser, and electricity exporters now facing carbon costs on goods entering the EU. Companies must pay based on embedded emissions in their products. The mechanism aims to prevent carbon leakage while encouraging decarbonisation globally.
ETS Reform Momentum: The Commission is advancing plans to reform the EU ETS, including potential expansion of the system to cover international aviation emissions beyond European routes, ensuring fairer treatment across airlines. Member state pushback on industrial free allowance cuts signals a potential compromise between climate ambition and competitiveness concerns.
Analysis: Dubious Chinese Offsets Expose Voluntary Market Weaknesses
The Bloomberg investigation into fraudulent Chinese carbon credits circulating through European voluntary markets represents a watershed moment for offset integrity. Companies purchasing credits from non-existent projects or audited by conflicted third parties are inadvertently funding no climate benefit—a direct threat to corporate net-zero commitments and market credibility.
The scale of the problem is material: companies across Germany, France, Italy, and other EU nations have unknowingly purchased these credits, many at premium prices justified by supposed certification rigor. The auditor-turned-developer revolving door reveals systemic governance failures in voluntary market oversight. Unlike compliance markets (EU ETS, RGGI), which operate under strict regulatory supervision, voluntary offset registries rely heavily on self-policing and certification bodies with limited independent verification.
This scandal arrives as voluntary carbon markets attempt to scale to meet corporate demand for offsets. Institutional investors and corporations seeking to offset residual emissions are now questioning the quality of purchases made in recent years. Verra and Gold Standard, the two largest registry operators, face pressure to demonstrate enhanced verification protocols and auditor independence. Expect renewed calls for mandatory third-party audits and blockchain-based transparency in voluntary markets.
The EU's CBAM and stricter ETS rules will likely accelerate demand for high-integrity credits, but only if markets can restore trust through transparent governance and credible certification.
What to Watch Next Week
- EU ETS Auction Results: Mid-week auctions may reveal market direction post-reform discussions; watch volumes and clearing prices for signals on industrial sentiment.
- CBAM Compliance Reporting: First major reporting deadline for exporters; delays or data quality issues could trigger regulatory guidance updates.
- Voluntary Market Reviews: Verra and Gold Standard may announce enhanced verification protocols or auditor independence rules in response to the Bloomberg findings.
- UK-EU Linkage Negotiations: Ongoing technical discussions between London and Brussels on formal market coupling; announcements could propel both market prices.
- Aviation Sector Preparation: Airlines must finalize 2026 emissions purchase strategies; expect corporate disclosures on compliance costs and carbon hedging tactics.
Data Sources:
- — EU ETS price data and UK link optimism
- — Industrial pushback on ETS reform
- — Aviation free allowance expiration analysis
- — Dubious Chinese offset investigation
- — CBAM definitive phase overview
- — North American market integration proposals
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