This series represents Total Investment Securities at Book Value call item RCFD0390.
Geographic location is determined by Federal Reserve District call item RSSD9170 = '01' representing FRB-Boston District.
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 Investment Securities at Book Value for Commercial Banks Geographically Located in FRB-Boston District (DISCONTINUED) [D1TISBV], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/D1TISBV, April 4, 2020.