The "marketplace" analogy is comically flawed. The actual marketplace works only when it's tightly regulated, from anti-trust to consumer protection to standard

The "marketplace" analogy is comically flawed. The actual marketplace works only when it's tightly regulated, from anti-trust to consumer protection to standards and on. When disputes arise, the totality of civil law and the court system serves to adjudicate them. Institutions such as Bloomberg are basically deputised to be trustworthy intermediaries collecting and verifying market data.