WASHINGTON, June 9 (Reuters) - Gary Gensler, who chairs the nation's top markets watchdog, said on Wednesday that he has asked staff to recommend rules aimed at ensuring fair competition between exchanges and brokers.

The U.S. Securities and Exchange Commission (SEC) rules would address payment-for-order-flow and best execution among other issues, Gensler said at a virtual conference on financial technology and global markets at Piper Sandler.

"I've asked staff to make recommendations for the Commission's consideration on best execution, Regulation NMS, payment-for-order flow, minimum pricing increments, and the National Best Bid and Offer, with the aim of continuing to make our markets as efficient as possible." (Reporting by Katanga Johnson Editing by Chizu Nomiyama)