According to Bitcoin Magazine citing Robinhood's preliminary monthly operating data, Robinhood and Bitstamp's combined crypto notional trading volume reached $17 billion in October, down 48% year-over-year and 21% month-over-month. During the same period, event contract trading volume hit 5.9 billion contracts, up 136% year-over-year and 5% month-over-month. Among these, the crypto trading volume on the Robinhood app was $6.8 billion, while Bitstamp contributed $10.2 billion. The monthly report is unaudited. Event contracts are measured in number of contracts, meaning the 5.9 billion figure cannot be directly added or compared with the dollar amount of crypto trading, and trading volume does not equal company revenue.