Regulation FD (Fair Disclosure), ordinarily referred to as Regulation FD or Reg FD, is a regulation that was promulgated by the U.S. Securities and Exchange Commission (SEC) in August 2000. The regulation is codified as 17 CFR 243. Although "FD" stands for "fair disclosure," as can be learned from the adopting release, the regulation was and is codified in the Code of Federal Regulations simply as Regulation FD. Subject to certain limited exceptions, the rules generally prohibit public companies from disclosing previously nonpublic, to certain parties unless the information is distributed to the public first or simultaneously.