Technical paper
Pricing American call options using the Black–Scholes equation with a nonlinear volatility function
In this paper, the authors investigate a nonlinear generalization of the Black–Scholes equation for pricing American-style call options, where the volatility term may depend on both the underlying asset price and the Gamma of the option.
Interpretability of neural networks: a credit card default model example
Recently developed techniques aimed at answering interpretability issues in neural networks are tested and applied to a retail banking case
Industry adoption scenarios for authoritative data stores using the International Swaps and Derivatives Association Common Domain Model
In this paper the authors explore opportunities for the post-trade industry to standardize and simplify in order to significantly increase efficiency and reduce costs.
One bad apple: default risk at CCPs
One clearing member's disproportionately large position increases the credit risk for all CCP members
The homotopy analysis method for derivatives pricing under wrong-way risk
Derivatives pricing is approximated with a computationally efficient homotopy-based application that accounts for WWR
Value-at-risk in the European energy market: a comparison of parametric, historical simulation and quantile regression value-at-risk
This paper examines a set of value-at-risk (VaR) models and their ability to appropriately describe and capture price-change risk in the European energy market.
Validation of index and benchmark assignment: adequacy of capturing tail risk
This paper provides practical recommendations for the validation of risk models under the Targeted Review of Internal Models (TRIM).
A simulation-based model for optimal demand response load shifting: a case study for the Texas power market
This paper describes a case study of analyzing DR load-shifting strategies for a retail electric provider for the Texas (ERCOT) market using a Monte Carlo simulation with stochastic loads and settlement prices.
The impact of the cross-shareholding network on extreme price movements: evidence from China
By using information about the ownership structure of listed companies from 2004 to 2016, the authors construct the cross-shareholding network for each year and examine the effects of the network position of a firm on extreme price movement.
Currency risk in foreign currency accounts for small and medium-sized businesses
This paper estimates the currency exposure before and after the hedging of active foreign currency (FC) accounts, using stochastic models for spot exchange rates and cashflow movements.
The Chebyshev method for the implied volatility
In this paper, the authors propose a bivariate interpolation of the implied volatility surface based on Chebyshev polynomials. This yields a closed-form approximation of the implied volatility, which is easy to implement and to maintain.
One-dimensional Markov-functional models driven by a non-Gaussian driver
The aim of this paper is to move away from a Gaussian assumption and to provide new algorithms that can be used to implement a Markov-functional model driven by a more general class of one-dimensional diffusion processes.
The swap market Bergomi model
The combination of two popular volatility models sharpens the hedging of exotic rate derivatives
Brent crude oil spot and futures prices: structural break insights
This study focuses on the analysis of long-run and short-run relationships between Brent crude oil spot and futures prices during the first Gulf War (1990–91) and the global financial crisis.
Estimation of value-at-risk for conduct risk losses using pseudo-marginal Markov chain Monte Carlo
The authors propose a model for conduct risk losses, in which conduct risk losses are characterized by having a small number of extremely large losses (perhaps only one) with more numerous smaller losses.
Cyber risk management: an actuarial point of view
This paper points out the peculiarities of cyber insurance contracts compared with the classical nonlife insurance contracts from both the insurer’s and the insured’s perspectives. The main actuarial principles that are fundamental to any valuation in a…
Costs of capital under credit risk
In cost-of-capital computations, credit risk is only taken into consideration at the level of the debt beta approach. We show that applications of the debt beta approach in company valuation suffer from unrealistic assumptions about the market index and…
Basel risk weight functions and forward-looking expected credit losses
The authors establish that the combination of lifetime ECL and the Basel Capital Adequacy Framework, which relies on a one-year horizon, results in capital overestimation. Alongside this finding, and in order to alleviate the problem, they propose two…
Credit valuation adjustment wrong-way risk in a Gaussian copula model
In this paper, we present an analytical expression for CVA with WWR under the assumption of the lognormally distributed trade value.
ADOL: Markovian approximation of a rough lognormal model
A variation of the rough volatility model is introduced by plugging in a different stochastic process
Stay ahead of the fixing lag
The price of fund-linked derivatives depends on the fixing lag of the underlying funds
Measuring expected shortfall under semi-parametric expected shortfall approaches: a case study of selected Southern European/Mediterranean countries
In this paper, the authors investigate the applicability of semi-parametric approaches for estimating expected shortfall.
Crash risk exposure, diversification and cost of equity capital: evidence from a natural experiment in China
Based on a broad sample of Chinese listed firms for the period 2001–10, this study investigates the effect of stock price crash risk exposure on the cost of equity capital and uses the split share structure reform as an exogenous shock to test whether…
Backtesting expected shortfall: a simple recipe?
In this paper, the authors introduce a new ES backtesting framework based on the duality between coherent risk measures and scale-invariant performance measures.