Debt, deficits and interest rates.

This paper identifies how a rise in the deficit/debt impacts interest rates by looking at the high‐frequency response of interest rates to fiscal surprises. The fiscal surprises are the unexpected components of deficit releases and the changes in official forecasts by the Congressional Budget Office and by the Office of Management and Budget. The paper estimates that a rise in the deficit‐to‐GDP ratio of 1 percentage point raises the 10‐year nominal interest rate by 8.1 basis points. The response is similar quantitatively for other Treasury maturities and for corporate debt interest rates. The paper also investigates which theoretical channel drives this relationship, and whether surprises affect interest rate expectations or the term premium. These results are used to estimate how recent spending may have affected interest rates. This paper is part of the Economica 100 Series. Economica, the LSE "house journal" is now 100 years old. To commemorate this achievement, we are publishing 100 papers by former students, as well as current and former faculty. Christopher David Cotton obtained his BSc from the LSE. [ABSTRACT FROM AUTHOR]