1. Imperial College, CFM–Imperial Institute of Quantitative Finance, London, SW7 2AZUK.
2. Oxford Centre for Industrial and Applied Mathematics, Mathematical Institute, University of Oxford, Oxford, OX2 6GGUK.
3. CABDyN Complexity Centre, University of Oxford, Oxford, OX1 1HPUK.
4. Department of Mathematics, University of California, Los Angeles, CA, 90095USA.
5. Oxford–Man Institute of Quantitative Finance, University of Oxford, Oxford, OX2 6EDUK.