Measuring value-at-risk and expected shortfall of newer cryptocurrencies: new insights

Agoestina Mappadang, Bayu Adi Nugroho, Setyani Dwi Lestari, Elizabeth and Titi Kanti Lestari

Cogent Business & Management, 2024, vol. 11, issue 1, 2416096

Abstract: A significant amount of historical returns is needed for the generalized autoregressive conditional heteroscedasticity (GARCH) models to be calibrated. Newer cryptocurrencies, such as non-fungible tokens (NFTs), have relatively limited data to create robust parameter estimates. This study uses a newly developed method, the exponentially weighted moving average (EWMA) model, that takes into account the fat-tailed distributions of returns and volatility response to forecast Value-at-Risk (VaR) and Expected Shortfall (ES). We employ thorough back tests of daily VaR and ES forecasts, which are widely utilized for regulatory approval and are considered to be industry standards. We also use loss function ratios to select the best model. Our results indicate that simpler models are just as good as the complicated ones, provided the simpler models capture fat-tailed distributions of returns. The primary findings hold up through several tests.

Date: 2024
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DOI: 10.1080/23311975.2024.2416096

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