This series represents Total Trading Assets call item RCFD3545.
Geographic location is determined by Abbreviated State Name call item RSSD9200 = 'MA' representing two character state abbreviation of Massachusetts.
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), Total Trading Assets for Commercial Banks in Massachusetts [MATTAST], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/MATTAST, October 21, 2018.