This article argues for an asymmetric insider trading policy under which insider trading that decreases the price of an overvalued stock is generally permitted, but insider trading that increases the price of an undervalued stock is generally prohibited. Concluding that the net investor benefits of price-decreasing insider trading exceed those of price-enhancing insider trading, the article argues that an asymmetric insider trading regime likely represents the bargain that shareholders and corporate managers would strike if they were legally and practically able to negotiate an insider trading policy. Current insider trading doctrine would permit regulators to impose such an asymmetric insider trading policy as the default rule.
Thomas A. Lambert, Overvalued Equity and the Case for an Asymmetric Insider Trading Regime, 41 Wake Forest L. Rev. 1045 (2006)