The Securities and Exchange Commission has largely wrapped up its enforcement on structured finance issues related to the financial crisis, according to current and former officials at the federal regulator. The SEC’s Complex Financial Instruments Unit is now focusing on more recent issues in the structured finance sector. “The unit has now shifted its attention to the next frontier, and I expect it to zero in on the structuring, rating, valuation, sale, and use of other types of complex financial products, such as commercial MBS, structured notes and credit default swaps,” Andrew Ceresney, the director of the SEC’s division of enforcement, said in May. Stephen Crimmins, a partner at the law firm of K&L Gates who previously worked at the SEC for 14 years, said...