What must be segregated under MSRB Rule G-8?

Under MSRB Rule G-8, the requirement for segregation specifically pertains to municipal agency and principal order tickets. This rule is aimed at ensuring that proper records are maintained for transactions related to municipal securities, distinguishing between orders placed as an agent versus orders placed as a principal.

Segregating municipal agency and principal order tickets helps in accurately tracking the responsibilities and liabilities associated with each type of transaction. By separating these records, firms can provide clarity in their dealings and reporting, which is essential for regulatory compliance and transparency in the municipal securities market.

The other options, while they may involve record-keeping, do not denote a specific requirement for segregation under this particular rule, which focuses on the distinct nature of the orders in the context of municipal securities.