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U.S. Government Securities Series
The U.S. Government Securities Series (which includes gross federal debt, privately held gross federal debt and Treasury debt) was last updated on this site in October 2010. The data will not be updated until further notice.

• Historical data used to calculate the U.S. Government Security Series

The primary data sources have changed over the years. The current sources are:

• U. S. Treasury: Monthly Statement of the Public Debt (MSPD) and Downloadable Files
• Wall Street Journal: Market Data Center U.S. Treasury Quotes
• Federal Reserve Bank of New York: U.S. Treasury Holdings in System Open Market Account

NOTE: These data are made available “as is” and “as available” for research purposes only. We do not warrant the data are error free. We do not make any representation or warranties about the accuracy, completeness, timeliness or reliability of the data. We reserve the right to correct any errors or omissions in the data.