S.E.C. Rules to Protect Investors From Cyberthreats Fall Short<br />Stock exchanges like IEX, Nasdaq and the New York Stock Exchange had to comply with the new requirements<br />and make their operations available for audits by the S. E.C.<br />These firms send Citadel almost three million equity orders a day totaling almost 1.7 billion shares, according to figures cited in an S. E.C.<br />Among them were firms that buy stock orders from retail brokerage firms, known as wholesalers or internalizers.<br />Also disquieting about the rule: Nowhere does the agency publish the list of entities that comply with the systems integrity rule.<br />rule required exchanges and certain other trading venues to have comprehensive procedures<br />ensuring “the robustness and resiliency of their technological systems.”<br />Bolstering cybersecurity measures was a component of the rule.<br />These orders accounted for about 35 percent of the average daily volume of retail stock trades in the United States, the S. E.C.
