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market-risk-forecasting
market-risk-forecasting PublicNext-day volatility forecasting for market risk — XGBoost against HAR and GARCH under walk-forward validation, with Value-at-Risk backtesting and a volatility-targeted portfolio
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Amazon-Review-Sentiment-Analysis
Amazon-Review-Sentiment-Analysis PublicThree-class sentiment analysis (satisfied, neutral, not satisfied) on 53k Amazon Echo Dot reviews with a heavy 81/8/11 class imbalance. Compares 7 TF-IDF classical models and 5 fine-tuned transform…
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