Most option pricing models assume all parameters except volatility are fixed; yet they almost invariably change on re‐calibration. This article explains how to capture the model risk that arises when parameters that are assumed constant have calibrated values that change over time and how to use...

This paper formalizes the class of scale-invariant volatility models and explores its hedging properties. A model is 'scale-invariant' if and only if its probability distribution of asset returns is independent of the current level of the asset price. We provide a set of equivalent properties...

The delta hedging performance of deterministic local volatility models is poor, with most studies showing that even the simple constant volatility Black-Scholes model performs better. But when the local volatility model is extended to capture stochastic dynamics for the spot volatility process,...

Fixed income analysts deal constantly with the challenge of mapping their expectations about the macroeconomic environment into movements of the yield curve. This paper assumes that an analyst is able to provide a forecast of a few benchmark yields or combinations of yields. Then it derives a...

There are two unique volatility surfaces associated with any arbitrage-free set of standard European option prices, the implied volatility surface and the local volatility surface. Several papers have discussed the stochastic differential equations for implied volatilities that are consistent...

Individual attitudes towards multinational enterprises (MNEs) remains relatively understudied compared to individual attitudes towards other dimensions of globalization, particularly trade and immigration. In order to illuminate individual attitudes towards MNEs, this paper utilizes a large...

We consider the impact of breaking news on market prices by looking at activity on the micro-blogging platform Twitter surrounding the #bigotgate scandal during the 2010 UK General Election, and subsequent movements of betting prices on a prominent betting exchange, Betfair. We find that the...