We revisit Kyle’s (Econometrica 53:1315–1335, <CitationRef CitationID="CR11">1985</CitationRef>) model of price formation in the presence of private information. We begin by using Back’s (Rev Financ Stud 5(3):387–409, <CitationRef CitationID="CR1">1992</CitationRef>) approach, demonstrating that if standard assumptions are imposed, the model has a unique equilibrium solution...</citationref></citationref>