Insider Trading, Informed Trading, and Market Making: Liquidity of Securities Markets in the Zero-Sum Game

This Article reexamines the nexus of relationships among informed transactions, information asymmetry, and liquidity of securities markets in the context of public policy debates about insider trading and its regulation.The Article analyzes this nexus, with the emphasis on recent empirical studies and developments in the securities industry, from a variety of perspectives and considers the validity of the alleged link between insider trading—as opposed to other forms of informed trading—and market liquidity as a justification for the existence of regulation.