Ethereum's 'Glamsterdam' Upgrade Targets MEV Fairness, Aiming for 2026

Published at 2025-12-20 19:15:17

Ethereum developers are progressing work on the so-called Glamsterdam upgrade, which is being positioned to improve fairness around miner/extractor value (MEV). Teams say the full technical scope is still being defined and that research, client implementations and community feedback will guide the final design as they aim for a 2026 rollout.

Glamsterdam matters because changes to MEV mechanisms can materially affect transaction ordering, front-running and fee dynamics across DeFi and on-chain trading, potentially reducing extractive behavior and improving predictability for users, wallets and validators. Market participants — from validators to exchanges and dApp builders — will be watching timelines and specification drafts closely, since MEV reforms can influence block rewards, fee markets and trading strategies on ETH markets.

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