High-frequency trading firms can expect greater surveillance of their operations in 2011, the chief of the Financial Industry Regulatory Authority said.

Richard Ketchum, chairman and chief executive of Finra, Wall Street's self-policing organisation, pointed to an enforcement case it brought in September against Trillium Brokerage Services as a "good example" of what the industry will see "going into 2011 with respect to market surveillance activities." Ketchum made the remarks on Friday at a year-end briefing for reporters.