I used to work in a large investment firm with billions in assets. We used Bloomberg API and Bloomberg terminals. It's near impossible to get rid of Bloomberg monopoly in this sector. It's not just data, it's access to data and chat early before something happens to the market. I remember there was a fire in California and before anyone (including major news networks) know who caused the fire they (Bloomberg chat) knew California energy company caused the fire. The companies that pay for Bloomberg terminals are making billions, paying $20k for one Bloomberg terminals is nothing for them.