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It was created by the industry’s self-regulating organization, the Financial Industry Regulatory Authority, or Finra.

The primary rules that covered the behavior of brokers were from FINRA, the industry’s self-regulating organization.

The authority, which is Wall Street’s self-regulating organization, said it was not trying to dictate culture, but to “understand how it affects compliance and risk management practices at firms,” according to its 2016 outlook released in January.

In the spring of 2009, at the apex of the calamity, Richard G. Ketchum assumed one of the most trying roles as head of Finra, Wall Street’s self-regulating organization, with a mission to amplify its power.

Hence, the banking sector had become a kind of self-regulating organization, writing its own legislation, weighing in on key appointments to oversight bodies.