Treasury Par Real Yield Curve Rates are commonly referred to as "Real Constant Maturity Treasury" rates, or R-CMTs. Par real yields on Treasury Inflation Protected Securities (TIPS) at "constant maturity" are interpolated by the U.S. Treasury from Treasury's daily par real yield curve. These par real yields are calculated from indicative secondary market quotations obtained by the Federal Reserve Bank of New York. The par real yield values are read from the par real yield curve at fixed maturities, currently 5, 7, 10, 20, and 30 years. This method provides a par real yield for a 10-year maturity, for example, even if no outstanding security has exactly 10 years remaining to maturity.

Daily Treasury Yield Curve Rates are commonly referred to as "Constant Maturity Treasury" rates, or CMTs. Yields are interpolated by the Treasury from the daily yield curve. This curve, which relates the yield on a security to its time to maturity is based on the closing market bid yields on actively traded Treasury securities in the over-the-counter market. These market yields are calculated from composites of indicative, bid-side market quotations (not actual transactions) obtained by the Federal Reserve Bank of New York.

The Foreign Holdings of US Securities Report provides information on the cross border financial flows into and out of the United States. This includes data on various US securities held by foreign entities as well as foreign securities held by the US.

The Monthly Statement of the Public Debt (MSPD) details the Treasury's outstanding debts and the statutory debt limit. Debt is categorized by whether it is marketable or non-marketable and whether it is debt held by the public or debt held by government agencies.

The US Banking Liabilities to Foreigners Report data series are based on submissions of monthly reports on own dollar liabilities and claims and on certain custody liabilities denominated in dollars. Quarterly reports are filed for liabilities and claims payable in foreign currencies and on dollar claims held for domestic customers. These reports are mandatory and are filed by banks and other depository institutions in the US.