Federal Debt Held by Federal Reserve Banks as Percent of Gross Domestic Product (HBFRGDQ188S) (https://fred.stlouisfed.org/series/HBFRGDQ188S) was first constructed by the Federal Reserve Bank of St. Louis in October 2012. It is calculated using Federal Debt Held by Federal Reserve Banks (FDHBFRBN) (https://fred.stlouisfed.org/series/FDHBFRBN) and Gross Domestic Product, 1 Decimal (GDP) (https://fred.stlouisfed.org/series/GDP): HBFRGDQ188S = (FDHBFRBN/GDP)*100

Federal Debt Held by Private Investors as Percent of Gross Domestic Product (HBPIGDQ188S) (https://fred.stlouisfed.org/series/HBPIGDQ188S) was first constructed by the Federal Reserve Bank of St. Louis in October 2012. It is calculated using Federal Debt Held by Private Investors (FDHBPIN) (https://fred.stlouisfed.org/series/FDHBPIN) and Gross Domestic Product, 1 Decimal (GDP) (https://fred.stlouisfed.org/series/GDP): HBPIGDQ188S = (FDHBPIN/GDP)*100

Federal Debt Held by Agencies & Trusts as Percent of Gross Domestic Product (HBATGDQ188S) (https://fred.stlouisfed.org/series/HBATGDQ188S) was first constructed by the Federal Reserve Bank of St. Louis in October 2012. It is calculated using Federal Debt Held by Agencies & Trusts (FDHBATN) (https://fred.stlouisfed.org/series/FDHBATN) and Gross Domestic Product, 1 Decimal (GDP) (https://fred.stlouisfed.org/series/GDP): HBATGDQ188S = ((FDHBATN/1000)/GDP)*100 FDHBATN/1000 transforms FDHBATN from millions of dollars to billions of dollars.

BEA Account Code: B097RC For more information about this series, please see http://www.bea.gov/national/.