IOSCO is consulting on possible outstanding issues and risks posed by existing or developing market structures. Its paper says securities regulators should strike an appropriate balance between a market structure that promotes competition among markets and one that minimises the potentially adverse effects of fragmentation on market integrity and efficiency, price formation, and best execution of investor orders. It makes recommendations on monitoring the impact of fragmentation on market integrity and efficiency, trade information, order handling rules and best execution, access to liquidity and market efficiency and resilience. It asks for comments by 10 May. (Source: IOSCO Consults on Market Structure Effects)