Credit Card Fraud Detection

The dataset, available at Kaggle, is originated from European Credit Card companies. It contains financial transactions for a two-day period, where 492 frauds were detected among nearly 290,000 transactions. As we can already notice, this is an unbalanced dataset, where fraud accounts for only 0.17% of the total. Another detail is that the features are all numerical and have been mischaracterized (due to privacy and security issues). The original data page reports that the variables were transformed using the Principal Component Analysis (PCA).