The Office of the Comptroller of the Currency (OCC) is clarifying and updating its rules that prescribe the standards under which national banks may purchase and sell, deal in, and underwrite securities. This final rule is another component of the OCC's Regulation Review Program, a project designed to review, modernize, and simplify OCC regulations and reduce unnecessary regulatory burdens on national banks. The final rule reorganizes the regulation by placing related subjects together, clarifies certain areas, and updates various provisions to address market developments and to incorporate significant OCC interpretations, judicial decisions, and statutory amendments.