Low frequency movements in stock prices: a state space decomposition

Nathan Balke and Mark Wohar ()

No 1, Working Papers from Federal Reserve Bank of Dallas

Abstract: Previous analyses have concluded that expectations of future excess stock returns rather than future real dividend growth or real interest rates are responsible for most of the volatility in stock prices. In this paper, we employ a state-space model to model the dynamics of the log price-dividend ratio along with long-term and short term interest rates, real dividend growth, and inflation. The advantage of the state space approach is that we can parsimoniously model the low frequency movements present in the data. We find that if one allows permanent changes, even though very small, in real dividend growth, real interest rates, inflation but not excess stock returns then expectations of real dividend growth and real interest rates become significant contributors to fluctuations in stock prices. However, we also show that stock price decompositions are very sensitive to assumptions about which unobserved market fundamentals have a permanent component. When we allow excess stock returns to have a permanent component but not real dividend growth, then excess stock returns becomes an important contributor to stock price movements while real dividend growth is not. Unfortunately, the data is not particularly informative about which of these alternative models is more likely.

Pages: 58 pages
Date: 2000
Note: Published as: Balke, Nathan S. and Mark E. Wohar (2002), "Low Frequency Movements in Stock Prices: A State Space Decomposition," The Review of Economics and Statistics 84 (4): 649-667.
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Journal Article: Low-Frequency Movements in Stock Prices: A State-Space Decomposition (2002)
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