MEV Supply Chain Concentrates
The economics of proposer-builder separation keep pushing block construction toward a few integrated builders, making maximal-extractable-value capture a recurring threat to Ethereum's censorship resistance.
forming · confidence 40 · Emerging (watchlist) · tracking since July 9, 2026 · updated July 9, 2026
Why the conviction moved
- Jul 9Strengthened +3
Ethereum researchers warned that under proposer-builder separation a single builder sees every bundle and can replicate a profitable searcher trade instead of honoring it, per the edition. This documents a concrete extraction mechanism that rewards builder concentration, reinforcing that PBS economics keep threatening censorship resistance.
Source trail
Supporting · July 9, 2026
Ethereum Researchers Warn Block Builders Can Quietly Steal Searchers' Trades
Ethereum researchers warned that under proposer-builder separation a single builder sees every bundle and can replicate a profitable searcher trade instead of honoring it, per the edition. This documents a concrete extraction mechanism that rewards builder concentration, reinforcing that PBS economics keep threatening censorship resistance.
Ethereum Research
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