Volumes more than doubled

Bitcoin trading volumes today at the CBOE are more than double the previous record.

With a couple hours of trading to go, more than 11,000 contracts have changed hands. That's up from yesterday's previous record of 4616 contracts.

Now it's only the 11th day of trading but it looks to me that many would-be futures buyers were looking for a dip to buy. That's a good sign for the contract but if it's an indication of underlying demand for Bitcoin longs, then it's good for a sign for prices as well.

The one worry is that investors could be leaving physical Bitcoin for derivatives.

The rise in futures is especially notable with Bitfinex closing to new users.