We propose a simple but rigorous stochastic volatility – stochastic correlation model, formulated as a pair of correlated CIRCEV and Jacobi processes. Our model proves to fit both marginal and joint distributions of implied volatility and correlation. When risk factors estimated from...

We propose a reduced-form eSIRD model to operationalize the country-specific Basic Reproduction Number and Mortality Rate for the COVID-19 pandemic. Enhanced from the classical epidemiological structural SIR model, our model has several contributions: 1) Allowing the effective Basic Reproduction...

We propose a method to integrate frequentist and subjective probabilities in order to obtain a coherent asset allocation in the presence of stress events. Our working assumption is that in normal market asset returns are sufficiently regular for frequentist statistical techniques to identify...

We propose a method to integrate frequentist and subjective probabilities in order to obtain a coherent asset allocation in the presence of stress events. Our working assumption is that in normal market asset returns are sufficiently regular for frequentist statistical techniques to identify...

Today's top financial-risk professionals have come to rely on ever-more sophisticated mathematics in their attempts to come to grips with financial risk. But this excessive reliance on quantitative precision is misleading--and it puts us all at risk. This is the case that Riccardo Rebonato makes...

Does the selection of a specific interest rate model to use for pricing, hedging, and risk-return analysis depend upon whether the user is a buy-side institution or a sell-side dealer bank? Sanjay Nawalkha and Riccardo Rebonato debate this question in this paper and provide some insightful...

In this paper I discuss financial models created to price complex derivatives. I argue that their development can only be understood with reference to the purposes for which they have been created, and to the institutional environment in which they have evolved. I show via stylized computer...

In this note I concisely present the main arguments advanced in "Taking Liberties" (2012). In particular, I look at the philosophical roots of libertarian paternalism. I examine whether the claims that it constitutes the "real Third Way" and that it always should be preferred to 'harder' forms...

We propose a method to integrate frequentist and subjective probabilities in order to obtain a coherent asset allocation in the presence of stress events. Our working assumption is that in normal market asset returns are sufficiently regular for frequentist statistical techniques to identify...

We have presented two simple methods to produce a feasible (i.e. real, symmetric, and positivesemidefinite) correlation matrix when the econometric one is either noisy, unavailable, or inappropriate. The first method is to the knowledge of the authors more general than any of the approaches...