Become familiar with the CRA Lending Tests for large banks
LT 1: AA Ratio
LT 2: Gap analysis
LT 3: Lending in your AA LMI tracts
LT4: Lending based on "borrower characteristics"
Examiners will compute your results under those tests and compare to all reporting lenders within your AA. They also will compare to certain demographic variables that become benchmarks. In the 2022 CRA NPR they refer to these as "calibrated benchmarks",
BTW they don't really compare you to peers. They compare you to all reporting lenders in your AA
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CRA Exam Preparation, CRA Performance Evaluations, Key Performance Benchmarks, & maps