Wild Bootstrap Testing for Speculative Bubbles using Spot and Futures Prices

The Essex Centre for Macro and Financial Econometrics warmly invites you to join guest speaker Ioannis Korkos from the Department of Economics and the University of Essex. 

  • Wed 22 Apr 20

    14:00 - 15:30

  • Online

    Zoom Meeting ID: 8243370109

  • Event speaker

    Dr Ioannis Korkos, Lecturer in Economics, University of Essex

  • Event type

    Lectures, talks and seminars
    Essex Centre for Macro and Financial Econometrics Research Seminar Series

  • Event organiser

    Essex Business School

  • Contact details

    Simon Price

This online seminar hosted by the Essex Centre for Macro and Financial Econometrics (ECMFE) invites Dr Ioannis Korkos from the Department of Economics who will present his work on wild bootstrap testing for speculative bubbles using spot and futures prices.

Seminar abstract

this study considers a wild bootstrap approach to existent tests for bubble identification to account for the possibility of heteroskdastic residuals that can attributed to breaks in volatility in order to study market efficiency in the commodity markets.

The simulation results suggest that the wild bootstrap test offers improved size control while offering significant power gains as the series of interest has been modelled as a moving average process rather than a unit root process since under the null hypothesis of market efficiency the difference between the future spot price and the futures contract price will be a moving average process of order specified by the length of the futures contracts.

In the empirical application, the proposed wild bootstrap test identifies periods of market inefficiency prior to a bubble episode that existent bubble detection tests do not detect during two periods of oil crises, acting as an early warning mechanism of non-stationary behaviour in the market that could, potentially, lead to a bubble episode. 


This online seminar is free to attend and there is no need to book in advance.

Speaker bio

Dr Ioannis Korkos is a Lecturer in Economics at the University of Essex.

His research examines explosive time series and macroprudential policy.

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