The derivatives exchange will now be majority owned by a joint venture backed by Robinhood and Susquehanna.

Miami International Holdings (Miax) said it has completed the sale of 90% of Miax Derivatives Exchange (Miaxdx) to a joint venture formed by Robinhood Markets and Susquehanna International Group, while keeping a 10% stake in the business. The group will remain invested in the derivatives exchange through its retained stake  Miaxdx is a Commodity Futures Trading Commission (CFTC)-regulated Designated Contract Market (DCM) and Derivatives Clearing Organisation (DCO), authorised to li