This series is a ratio of Net interest income call item RIAD4074 to Quarterly Average of Total Assets call item RCFD3368.
The asset class is determined by using Total Assets call item RCFD2170 less than or equal to $5B. Geographic location is determined by Abbreviated State Name call item RSSD9200 and County Code call item RSSD9150, which is mapped to the proper Core Based Statistical Area (CBSA) defined by the Office of Management and Budget (OMB).
Data are annualized.
For more information and definition about the specific call item codes, please see http://www.federalreserve.gov/apps/mdrm/data-dictionary.
This series is calculated by the Federal Reserve Bank of St. Louis using raw data that are collected by the FFIEC. Raw data can be found at https://cdr.ffiec.gov/public/.
Federal Financial Institutions Examination Council (US), Net Interest Margin for Commercial Banks with Assets under $5B in Chicago-Naperville-Elgin, IL-IN-WI (MSA) [NIMCHI], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/NIMCHI, February 28, 2020.