Ethereum to switch to Proof-of-Stake before November 1, 2017 This market resolves to Yes, if the Ethereum network switches from Proof-of-Work to Proof-of-Stake consensus as part of the Ethereum Serenity live release before November 1, 2017. The resolution date of this market may be accelerated. Bets matched after the antedated resolution date will be voided.
Source: http://www.coindesk.com/