October 3, 2011. Retrieved December 21, 2011. ↑ ""Information, Privilege, Opportunity, and Insider Trading" in the Northern Illinois University Law Review" (PDF). Retrieved January 7, 2013. ↑ Kristoffel Grechenig, The Marginal Incentive of Insider Trading: An Economic Reinterpretation of the Case Law, University of Memphis Law Review 2006, vol.