The late 1990s and early 2000s saw the most dramatic loosening of financial regulation since the 1920s. Glass-Steagall was repealed. OTC derivatives were explicitly exempted from CFTC oversight. When Enron and WorldCom showed what the new environment produced, Congress responded with Sarbanes-Oxley — but only on corporate accounting, not on the structural changes that had already happened inside the banks themselves.