Riot Blockchain (NASDAQ:RIOT) shares fell over 2% premarket after the bitcoin miner provided October production update.The company mined 509 BTC in the month, an increase of approximately 10% Y/Y and 43% M/M. It sold 450 BTC, generating net proceeds of approximately $8.7M.As of October 31, 2022, Riot (RIOT) held ~6,825 BTC, all produced by its self-mining operations.It had a deployed fleet of 65,516 miners, with a hash rate capacity of 6.9 EH/s as of October 31, 2022.