The Cardano Van Rossem hard fork reached its mainnet go/no-go decision on June 16, 2026, during Epoch 637, marking what reports describe as the most consequential single day in the protocol's Voltaire governance era. According to reports from 99Bitcoins, this represents the first hard fork in Cardano's history initiated through the Voltaire on-chain governance framework rather than by IOG acting unilaterally. The decision must clear a community-governed process that has never activated a mainnet hard fork before, with node adoption strong enough that a green light is plausible.
The readiness picture heading into June 15 was materially better than at any prior decision window. As reported by 99Bitcoins, 52% of nodes are self-reporting Protocol Version 11 according to PoolTool, while Cexplorer puts the block-production share higher at 84% of blocks minted over the five days to June 12 coming from v11 nodes. The current mainnet epoch shows 76% of block production running on Protocol Version 11, with exchange readiness described as improving rapidly by Intersect. Several light wallets have achieved full readiness status, and no underlying protocol issues were identified.
The Van Rossem upgrade is Cardano's move to Protocol Version 11, technically an intra-era upgrade that changes protocol capabilities and governance parameters without launching an entirely new ledger era. According to reports from 99Bitcoins, this governance action was submitted on May 26 and is sitting at approximately 55% approval, with ratification expected within weeks according to Intersect's June 12 update. The upgrade also carries an update to the Plutus cost model, the pricing schedule that determines how much computation each smart contract operation costs on-chain. The mainnet Plutus Cost Model update was scheduled for June 18 at 21:45 UTC, following weeks of testing across Cardano's Preview and Preprod networks.
Exchange readiness has been described as improving rapidly, with Binance and Coinbase now showing the Cardano Van Rossem hard fork upgrade as In Progress. As reported by 99Bitcoins, Exchange Readiness Completed is reporting as 20.69%, indicating widespread exchange infrastructure preparation for the upgrade. For teams running infrastructure, two supported compatibility paths exist through Intersect-maintained forks of Ogmios (v6.14.0.2) and Kupo (v2.11.0.1), both maintained by IOG. Cardano's Lace wallet received updates before the Van Rossem fork, targeting Protocol Version 11 and expected to improve Plutus performance, ledger consistency, and node-level security.
While the Van Rossem hard fork achieved success, Cardano price movements have shown sensitivity to macro sentiment and liquidity shifts, with declines reaching the mid-20% area from recent local highs. According to recent market analysis, Cardano remains range-bound post-upgrades, with traders watching for staking- and governance-driven momentum. The network continues to maintain consistent staking participation and steady on-chain activity despite the price weakness. The governance action is now due to expire on July 18, giving delegated representatives, stake pool operators, and the Constitutional Committee a limited window to complete the ratification process. Market indicators tracked by Changelly show only 35% bullish sentiment and a Fear & Greed Index reading of 23/100, marking 'Extreme Fear' conditions with less than one-third of daily closes over the past month being green.
