Source: U.S. Office of Management and Budget  

Source: Federal Reserve Bank of St. Louis  

Release: Debt to Gross Domestic Product Ratios

Units:  Percent of GDP, Seasonally Adjusted

Frequency:  Quarterly

Federal Debt Held by Private Investors as Percent of Gross Domestic Product (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) and Gross Domestic Product, 1 Decimal (GDP):
HBPIGDQ188S = (FDHBPIN/GDP)*100