Data Foundations for Financial AI
Go beyond simple spend totals. Build merchant-category velocity features, time-of-day patterns, graph-based peer similarity, and seasonality signals that capture real behavior. These enrichments help models distinguish routine payday spikes from suspicious bursts demanding escalating review.
Data Foundations for Financial AI
Fraud and default are rare, so balanced accuracy can mislead. Use focal loss, stratified sampling, and cost-sensitive training, then monitor population drift with PSI or KS tests. When distributions shift, automated retraining and champion–challenger setups keep performance resilient.