<STRONG>Contingent claims valuation when the security price is a combination of an Ito process and a random point process. <BR></STRONG>Aase, K K <BR><B>STOCHASTIC PROCESS. APPLIC. Vol. 28, no. 2, pp. 185-220. 1988 </B><BR><BR>This paper develops several results in the modern theory of contingent claims valuation in a frictionless security market with continuous trading. The price model is a semi-martingale with a certain structure, making the return of the security a sum of an Ito-process and a random, marked point process. Dynamic equilibrium prices are known to be of this form in an Arrow-Debreu economy, so there is no real limitation in the approach. This class of models is also advantageous from an applied point of view. Within this framework the author investigates how the model behaves under the equivalent martingale measure in the P super(*)-equilibrium economy, where discounted security prices are marginales. Here he presents some new results showing how the marked point process affects prices of contingent claims in equilibrium. <BR><BR><a><IMG src="http://md1.csa.com/partners/images/question.gif"></A><B>Descriptors:</B> economics; point processes; semimartingales; equilibrium <BR>