premise: The SEC believes that the benefits of the rule outweigh the costs attributed to it since it will significantly ease the regulatory burden by eliminating the trading restrictions for underwriters of actively-traded securities, reducing the restricted periods for other securities, provide a more flexible framework for stabilizing transactions, expanding the securities eligible for Nasdaq passive market making during an offering and deregulating rights offerings.
hypothesis: Underwriters of actively-traded securities are not happy with the regulatory hoops they have to jump through.