FIA responded to the FCA Call for Input on the topic of market data from the market data users’ perspective and has been drafted with exchange-traded derivatives in mind. Mandatory consumption and use of market data for regulatory purposes have increased dramatically in recent years, and FIA members that are consumers of market data have noted that market data fees charged by derivatives trading venues have also increased significantly over the last few years. FIA's letter sets out the views of a subset of members using market data for meeting regulatory requirements, as well as for investment/trading purposes, and suggests possible solutions to improve the way that market data is consumed and used by market participants.