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Author

Thakhani Ravele

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Open access Jul 2026

Exploring the Dynamics of ZAR/USD Exchange RateVolatility Using the fGARCH and First-Order Beta-Skew-T-EGARCH Models

This study investigates and explores the volatility dynamics of the South African rand against the US dollar (ZAR/USD) using the Family GARCH (fGARCH) model and the First-Order Beta-Skew-T-Generalised Autoregressive Conditional Heteroskedasticity (Beta-Skew-T-EGARCH) model. Currency volatility across the globe, uncerta...

Dzulani Mashavhela, Thakhani Ravele, C. Sigauke · 0 citations
Open access Aug 2026

Machine Learning-Based Crisis Detection Framework for Banking Systems: A Case Study of Nigeria

Results indicate that tree-based ensemble models outperform logistic regression on the test set: XGBoost achieves the best generalization performance and Random Forest has the highest cross-validated F1-score on the training set.

Ntanganedzeni Mandiwana, Thakhani Ravele, C. Sigauke et al. · 0 citations

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