Joseph Mays Jr., a consultant to small broker-dealers and a former NASD examiner, says Finra should have scrutinized the mortgage-backed securities at the root of the crisis. “If I had to assign blame, I’d blame Finra and the SEC, but I’d blame Finra first because it’s the first line of defense,” he said.

The only thing worse than having no watchdog is the false security of having one—and then finding out it gums its Kibbles ‘n Bits.

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Ryan Chittum is a former Wall Street Journal reporter, and deputy editor of The Audit, CJR's business section. If you see notable business journalism, give him a heads-up at rc2538@columbia.edu. Follow him on Twitter at @ryanchittum.