We derive the class of arbitrage-free affine dynamic term structure models that approximate the widely-used Nelson-Siegel yield-curve specification. Our theoretical analysis relates this new class of models to the canonical representation of the three-factor arbitrage-free affine model. Our...

From a macroeconomic perspective, the short-term interest rate is a policy instrument under the direct control of the central bank. From a finance perspective, long rates are risk-adjusted averages of expected future short rates. Thus, as illustrated by much recent research, a joint...

The Svensson generalization of the popular Nelson-Siegel term structure model is widely used by practitioners and central banks. Unfortunately, like the original Nelson-Siegel specification, this generalization, in its dynamic form, does not enforce arbitrage-free consistency over time. Indeed,...

This paper examines a shift in the dynamics of the term structure of interest rates in the United States during the mid-1980s. We document this shift using standard interest rate regressions and using dynamic, affine, no-arbitrage models estimated for the pre- and post-shift subsamples. The term...

This Economic Letter summarizes the papers presented at the conference "Macroeconomic Models for Monetary Policy" held at the Federal Reserve Bank of San Francisco on March 1-2, 2002, under the joint sponsorship of the Federal Reserve Bank of San Francisco and the Stanford Institute for Economic...

This Economic Letter summarizes papers presented at the conference "Finance and Macroeconomics" held at the Federal Reserve Bank of San Francisco on February 28 and March 1, 2003, under the joint sponsorship of the Bank and the Stanford Institute for Economic Policy Research. The papers are...

In the latest episode of monetary tightening in the United States, the Federal Open Market Committee (FOMC), which sets U.S. monetary policy, raised the target level of its key policy interest rate, the federal funds rate, from 1% in June 2004 to 5-1/4% in June 2006. This gradual increase was...