Evaluating of Loan Guarantees Between Parent and Subsidiary Based on Vulnerable Option

Abstract

Loan guarantees between parent and subsidiary is the main related transaction in business group, its correct estimation is the foundation of controlling group’s credit risk. Applying option theory, this paper researches the vulnerable option characters of loan guarantees, gives the valuation model under two different security methods, theoretically analyzes the influence of such critical factors as companies asset value and equity ratio to loan guarantees’ value and provides theoretical basis for the decision-making of loan guarantees.