This series represents Allowance for Loan and Lease Losses call item RCFD3123.
Geographic location is determined by Abbreviated State Name call item RSSD9200 = 'OK' representing two character state abbreviation of Oklahoma.
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), Allowance for Loan and Lease Losses for Commercial Banks in Oklahoma [OKALLL], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/OKALLL, March 26, 2019.