"We will do everything in our power to pursue those who attempt to engage in fraud or manipulation in our markets," Chairman Tim Massad said in the text of a speech prepared for delivery at a conference in Chicago.

"There is nothing more important than the integrity of our markets," he said.

On Tuesday, the CFTC filed civil charges against Navinder Singh Sarao who was arrested in London. His arrest followed criminal charges brought by the U.S. Justice Department for wire fraud, commodities fraud and manipulation.

(Reporting by Douwe Miedema; Editing by Chizu Nomiyama)