This paper investigates option prices in an incomplete stochastic volatility model with correlation. In a general setting, we prove an ordering result which says that prices for European options with convex payoffs are decreasing in the market price of volatility risk. As an example, and as our...

We develop a parameterised model for liquidity effects arising from the trading in an asset. Liquidity is defined via a combination of a trader's individual transaction cost and a price slippage impact, which is felt by all market participants. The chosen definition allows liquidity to be...

The dynamical evolution of many economic, sociological, biological and physical systems tends to be dominated by a relatively small number of unexpected, large changes (`extreme events'). We study the large, internal changes produced in a generic multi-agent population competing for a limited...

We analyse a model in which bank deposits are insured and there is an exogenous cost of bank capital. The former effect results in bank overinvestment and the latter in underinvestment. Regulatory capital requirements introduce investment distortions which are a constrained optimal response to...

This paper analyses multivariate high frequency financial data using realised covariation. We provide a new asymptotic distribution theory for standard methods such as regression, correlation analysis and covariance. It will be based on a fixed interval of time (e.g. a day or week), allowing the...

Non-Gaussian processes of Ornstein-Uhlenbeck type, or OU processes for short, offer the possibility of capturing important distributional deviations from Gaussianity and for flexible modelling of dependence structures. This paper develops this potential, drawing on and extending powerful results...

This article reports a unique analysis of private engagements by an activist fund. It is based on data made available to us by Hermes, the fund manager owned by the British Telecom Pension Scheme (BTPS), on engagements with management in companies targeted by its U.K. Focus Fund (HUKFF). In...

While we associate the U.K. with a high level of investor protection, this was not the case in the first half of the twentieth century - U.K. capital markets were marked by an absence of investor protection and few common law rights for minorities. Notwithstanding this, securities markets...

This paper provides consistency and a distributional result for an estimate of the integrated volatility in different Levy type stochastic volatility models based on high frequency data. As an estimator we consider the p-th power variation, i.e. the sum of the p-th power of the absolute value of...

This paper develops a subordinated stochastic process model for the asset price, where the directing process is identified as information. Motivated by recent empirical and theoretical work, we make use of the under-used market statistic of transaction count as a suitable proxy for the...