Open Access Article

Title: Bootstrapped nonlinear impulse-response analysis: the FTSE100 (UK) and the NDX100 (US) indices 2012-2021

Authors: Per Bjarte Solibakke

Addresses: Norwegian University of Science and Technology (NTNU), Larsgårdsvn. 2, 6025 Ålesund, Norway

Abstract: This paper presents bootstrapped nonlinear impulse response function analyses for general step ahead mean and volatility densities. From strictly (ergodic and) stationary series and BIC optimal nonlinear model coefficients, the paper establishes step-ahead densities for both the conditional mean and volatility. For sampling variances using one thousand samples and conditioning all paths on the daily impulses -5, -3, ..., 5% all mean and volatility responses show mean reversion. For the volatility, all increases seem to arise from negative index movements suggesting strong asymmetry. Furthermore, the model coefficients for the volatility exhibit data dependence suggesting ability to predict volatility. The indices report some striking step-ahead differences for both the mean and the volatility. For the mean, only the NDX100 seems to show overreactions. For the volatility, for both positive and negative impulses the NDX100 reports higher volatility responses then FTSE100. However, asymmetry manifested for both indices suggesting that trading volatility as an asset may insure against market crashes and be an excellent diversification instrument. Finally, using a stochastic volatility model to obtain calibrated functions that give step-ahead predicted values for static predictions, enriches participants' derivative trading strategies (i.e., volatility swaps).

Keywords: bootstrapping; conditional heteroscedasticity; equity markets; impulse-response functions; nonlinearity; volatility predictions.

DOI: 10.1504/IJCEE.2021.10043332

International Journal of Computational Economics and Econometrics, 2022 Vol.12 No.1/2, pp.197 - 221

Received: 18 Mar 2021
Accepted: 02 Sep 2021

Published online: 24 Jan 2022 *