At Norbert Michel's piece on the topic:
... virtually all financial market activity has taken place under the watchful eye of federal regulators since at least the 1930s. True deregulation would establish a market where no government agency regulates the types of products and services people are allowed to produce and purchase. This type of financial market does not currently exist in the U.S., and it certainly did not exist prior to the 2008 crisis. Financial regulators have increasingly micromanaged financial firms’ activities despite the fact that this approach has repeatedly failed to prevent financial market instability.