IV Interpretation Guide
IV RangeStrengthAction
IV > 0.5Very StrongInvestigate for data leakage
0.3 – 0.5StrongInclude, explore interactions
0.1 – 0.3ModerateFeature engineering opportunity
0.02 – 0.1WeakInvestigate data quality
< 0.02Not UsefulExclude or redesign
Gini Coefficient (0–1) · KS Statistic (0–1) · higher values = better separation
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