SEC Daniel Guidotti 14 years ago SECAn abbreviation for the Securities and Exchange Commission, which is the securities industry’s federal regulating body.Random Finance Terms for the Letter SSECSecond Pass RegressionSecondary IssueSecondary MarketSectorSector AnalysisSection 482 DefinitionSecured DebtSecurities & Exchange CommissionSecurities AnalystsRecommended for you:Securities & Exchange Commission Securities Analysts Second Pass Regression Secured Debt