
White paper
A Simple Traffic Light Approach To Backtesting Expected Shortfall
Abstract. We propose a Traffic Light approach to backtesting Expected Shortfall which is completely consistent with, and analogous to, the Traffic Light approach to backtesting VaR initially proposed by the Basel Committee on Banking Supervision in their 1996 consultative document [5]. The approach relies on the generalised coverage test for Expected Shortfall developed in [6].
White paper
Prices of barrier and first-touch digital options in Lévy driven models, near barrier
This paper describes the calculation of the asymptotics of barrier options and one-touch options near the barrier for wide classes of Lévy processes. In the case of processes of infinite activity and finite variation, with the drift pointing from the barrier, the authors prove that the price is discontinuous at the barrier. This observation can serve as the basis for a simple, robust test of the type of processes observed in the financial markets.
White paper
Taking risk to the top office
Following the billions of dollars in subprime writedowns, banks continue to look at how best to organise the risk management function. Steve White makes a far-reaching proposal.
White paper