This working paper was written by Cho-Hoi Hui (Hong Kong Monetary Authority), Chi-Fai Lo (The Chinese University of Hong Kong) and Ho-Yan Ip (The Chinese University of Hong Kong).Asymmetric behaviour has been documented in unemployment rates which increase quickly in recessions but decline...

This paper proposes a simple bounded stochastic motion to model equity price dynamics under shocks. The stochastic process has a quasi-bounded boundary which can be breached if the probability leakage condition is met. The quasi-boundedness of the process at the boundary can thus provide an...

This paper develops a valuation model of European options incorporating a stochastic default barrier, which extends a constant default barrier proposed in the Hull-White model. The default barrier is considered as an option writer's liability. Closed-form solutions of vulnerable European option...