Fraud and abuse in the "Hot issues" and "Penny stock" markets : hearing before the Subcommittee on Securities of the Committee on Banking, Housing, and Urban Affairs, United States Senate, Ninety-eighth Congress, first session, on the efforts of the Securities and Exchange Commission and the National Association of Securities Dealers to protect the investing public from fraud and abuse in the so-called "Penny stocks" and "Hot issues" markets, December 15, 1983--New York, New York.