Riot Blockchain Inc. said it's buying a Florida futures brokerage firm in an effort to create a digital currency exchange and a futures brokerage operation.

The Castle Rock company (Nasdaq: RIOT) said it's buying Logical Brokerage Corp of Miami for an undisclosed price.

"We have identified a substantial market need for additional options to serve a growing customer desire to transact in digital currencies within the U.S. Logical Brokerage helps provide a platform from which to service this market," said John O'Rourke, chairman and CEO of Riot Blockchain, in a statement.

Riot Blockchain shares, to put it mildly, have been on a wild roller coaster ride since October, after the medical device company Bioptix changed its name to Riot Blockchain and said it would it focus on bitcoin and digital currency.

Read more at the Denver Business Journal: http://bit.ly/2FR4l1R