Estimating Large Dense Covariance Matrices under Changing Market Conditions
Conference
65th ISI World Statistics Congress 2025
Format: IPS Abstract - WSC 2025
Keywords: finance, large dimensional covariance model
Session: IPS 805 - Models and Algorithms for Time Course Data
Tuesday 7 October 2 p.m. - 3:40 p.m. (Europe/Amsterdam)
Abstract
Key to risk metrics in corporate finance is the dynamic covariance between assets. It may be necessary to estimate up to 10,000 covariances and to do so quickly. The Gaussian copula approach to covariance estimation is computationally efficient but is it robust? We will explore estimation of covariances using time series approaches, and adapt these approaches to quickly changing market conditions. Our methodology will provide short-term covariance forecasting and long-term covariance scenario estimation. Computational speed will be central to our considerations.