Pre-arranged trading can create an unfair market as it is, in substance, executing risk-free transactions at pre-determined prices rather than at market prices. As the transfer of beneficial interest or market risk (if any) is only between persons who are acting in concert or collusion, there is essentially no legitimate commercial rationale behind pre-arranged transactions. Likewise, a Trading Representative who consistently matches his own buy and sell orders may be considered to have engaged in pre-arranged trading as the transactions are unlikely to be executed for a legitimate economic purpose.
Added on 3 June 20193 June 2019.