Leveling the Financial Playing FieldSEC is on a roll to ferret out investment techniques, such as dark pools and flash orders.SavePrintSecurities and Exchange Commission (SEC) Chair Mary Schapiro. Alex Wong/Getty ImagesHeide B. Malhotra11/11/2009|Updated: 10/1/2015We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.