Interest rate uncertainty and the shape of the yield curve of U.S. treasury bonds

We decompose the yield curve of U.S. Treasury bonds into three components—the level, slope, and curvature. We then explore the interaction between these factors and uncertainty in the U.S. bond market. We assess this uncertainty using a VIX-style estimate originating in options on the CBOE’s Treasury Note futures. Using monthly data for 2003–2020, we find that interest rate uncertainty drives the evolution in the shape of the yield curve, but not vice versa. Specifically, the bond market’s VIX-style metric not only correlates with but also influences the yield curve’s level and slope. Moreover, increased uncertainty about interest rates is negatively associated with, and can significantly influence, the yield curve’s curvature. The results of this study are crucial for both policymakers and money managers.