www.cadwalader.com/resources/clients-friends-memos/choose-one-best-interest-or-full-service
www.shearman.com/perspectives/2018/04/sec-proposes-broker-dealer-standard-of-care-and-guidance
www.sec.gov/news/speech/speech-clayton-2018-05-02
www.sec.gov/news/press-release/2018-68