Mark Thoma writes in favor of more regulation:
...after decades and decades of instability in the 1800s and early 1900s, followed by the massive bank failures of the early 1930s, regulations were imposed to stabilize the banking system. The result was sixty years of calm in the financial sector. That's hardly a failure of regulation. It wasn't until the shadow banking system began growing outside of the regulatory umbrella that problems began to reemerge..bringing about another decades long period of relative stability will require the regulatory umbrella to be extended to cover all firms within both the traditional and non-traditional (or shadow) banking system, hedge funds included.