This series represents Total Investment Securities at Book Value call item RCFD0390.
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://m-fwapp2p.frb.gov/apps/rs_a/MDRM/DataDictionary/search.cfm.
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 Investment Securities at Book Value for Commercial Banks in Massachusetts(DISCONTINUED SERIES) [MATISBV], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/MATISBV/, July 8, 2015.