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Nelson-Siegel Decay Factor and Term Premia in Japan

Junko Koeda and Atsushi Sekine ()

No 2106, Working Papers from Waseda University, Faculty of Political Science and Economics

Abstract: This study examines the two-decade-long low interest rate environment in Japan using the NelsonSiegel yield curve framework emphasizing the role of decay factor. We find that the decay factor has declined particularly after the global financial crisis, pushing down the entire yield curve as well as the conditional variance of bond yield in Japan. The decay factor was very low when BOJ’s yield curve control started in 2016 and remained low with small fluctuations since. Decay factor shocks can be interpreted as long-dated term premium shocks, and these shocks tend to decrease with BOJ’s bond purchases, controlling for other possible factors that affect term premia such as business cycles and economic uncertainty.

Keywords: decay factor; Nelson Siegel; term premium; yield curve control; Japan; nonlinear state space model (search for similar items in EconPapers)
JEL-codes: C32 E52 E58 (search for similar items in EconPapers)
Pages: 30 pages
Date: 2021-04
New Economics Papers: this item is included in nep-mac and nep-mon
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Journal Article: Nelson–Siegel decay factor and term premia in Japan (2022) Downloads
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