Title: “Bond risk
premia: the information in really long-maturity forward rates”
Speaker: Andrea
Berardi (Università Ca' Foscari Venezia)
Abstract: Disentangling
expectations of future interest rates from risk premia in the
determinants of the term structure has long been a challenge,
not only to financial economists but to policymakers. Although
the great majority of empirical research on the term structure
focuses on relatively short maturities (10 years or less), we
show that distinguishing between expectations and risk premia
is easier at long maturities and, in this paper, we include
much longer term rates (20 years and more). In this region,
differences in forward rates are little affected by
expectations but, nonetheless, reflect significantly
differences in risk premia. Key to extracting information
about risk premia, is taking proper account of the influence
of time-varying volatility of long-term rates and bond
convexity. The impact of convexity on the term structure
increases strongly with maturity and leads frequently to a
negative slope (a “downward tilt”) in long-term forward rates.
We employ a four-factor affine model with stochastic
volatility that fits the dynamics of the yield curve and, in
particular, the downward tilt in forward rates, well. Risk
premia in our model are, on average, monotonically upward
sloping and we find that volatility accounts for a significant
fraction of their variation over time. We also find that
including stochastic volatility results in less volatile
estimates of term premia than in models with constant
volatility. Our model is consistent with previously reported
deviations from the pure Expectations Hypothesis, a result
which contrasts with previous empirical evidence on the
failure of stochastic volatility term structure models in this
matter.
Best regards,
Luca Regis
--
Luca Regis
Associate Professor
Department of Economics and Statistics (ESOMAS)
University of Torino
sites.google.com/view/lucaregis
Office: +39 011 670 6065
www.carloalberto.org/lti