Congress has taken steps to reform our financial system, a difficult and complex task. As of this writing, only the first steps have been taken: Initial legislation has yet to be finalized, and more reforms are needed if we are to prevent future crises.
At the top of my list of additional reforms is an overhaul of Fannie Mae and Freddie Mac, the government-sponsored enterprises that were at the center of the recent crisis. Their actions severely damaged the mortgage market, forced both institutions into conservatorship and will require ongoing large bailouts with taxpayer funds. At a minimum, we need to break up these GSEs-perhaps into regional companies-to open up the market to private players and restructure the incentives under which they operate. Legislators have promised to deal with the GSE problems later this year.
Next, we need to find a way to prevent runs on major nonbank financial institutions, the so-called shadow banking sector. Before the crisis, regulators were not concerned with the possibility of such runs. The more familiar type of run-bank runs by depositors- has occurred numerous times in our economic history, but deposit insurance has successfully thwarted such panics since it was introduced in the 1930s. No one thought that secured creditors of companies such as Bear Stearns, AIG and GMAC would abruptly abandon their repurchase agreements, threatening not only the viability of these companies but also the stability of global financial markets. Deposit insurance is not effective here since these firms do not take deposits. Stricter capital requirements have been proposed as a backstop against excessive risk-taking in the future, but capital requirements alone will not prevent runs.
Extremely large, globally interconnected financial firms are also part of the "too big to fail" conundrum. I can understand the opposition to bailing out these companies. But if we allow abrupt failure, panic will likely ensue, costing society more than would almost any bailout. We need to find a way to unwind these companies in an orderly fashion, similar to the way troubled smaller banks are now quickly and quietly taken over. The proposed legislation does set up a liquidation facility for large financial firms. That facility will probably not gain credibility until it is actually used-until then, we likely have to live with "too big to fail."
Another segment of the financial system that needs an overhaul is the credit rating agencies. These agencies provided investment- grade ratings to portfolios of risky mortgages that later turned out to be worth very little. …