New Economics Papers
on Market Microstructure
Issue of 2007‒06‒23
two papers chosen by
Thanos Verousis

  1. Bond risk premia and realized jump volatility By Jonathan Wright; Hao Zhou
  2. Aggregation of Information and Beliefs in Prediction Markets By Marco Ottaviani; Peter Norman Sørensen

  1. By: Jonathan Wright; Hao Zhou
    Abstract: We find that adding a measure of market jump volatility risk to a regression of excess bond returns on the term structure of forward rates nearly doubles the R square of the regression. Our market jump volatility measure is based on the realized jumps identified from high-frequency stock market returns using the bi-power variation technique. The significant enhancement of bond return predictability is robust to different forecasting horizons, to using non-overlapping returns and to the choice of different window sizes in computing the jump volatility. This market jump volatility factor also crowds out the price-dividend ratio in explaining much of the countercyclical movement in bond risk premia. We argue that this finding provides support for the unspanned stochastic volatility hypothesis according to which the conditional distribution of excess bond returns is affected by state variables that are not in the span of the term structure of yields and forward rates.
    Date: 2007
  2. By: Marco Ottaviani (London Business School); Peter Norman Sørensen (Department of Economics, University of Copenhagen)
    Abstract: We analyze a binary prediction market in which traders have heterogeneous prior beliefs and private information. Realistically, we assume that traders are allowed to invest a limited amount of money (or have decreasing absolute risk aversion). We show that the rational expectations equilibrium price underreacts to information. When favorable information to an event is available and is revealed by the market, the price increases and this forces optimists to reduce the number of assets they can (or want to) buy. For the market to equilibrate, the price must increase less than a posterior belief of an outside observer.
    Keywords: prediction markets; private information; heterogeneous prior beliefs; limited budget; underreaction
    JEL: D82 D83 D84
    Date: 2007–05

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