1,788 research outputs found

    The Chow ring of the classifying space of GO(2n)

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    Directional Mobility of Ratings

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    In this paper we describe a method to decompose a well-known measure of debt ratings mobility into it’s directional components. We show, using sovereign debt ratings as an example, that this directional decomposition allows us to better understand the underlying characteristics of debt ratings migration and, for the case of the data set used, that the standard Markov chain model is not homogeneous in either the time or cross-sectional dimensions. We find that the directional decomposition also allows us to sign the change in quality of debt over time and across sub-groups of the population.Ratings migration, Mobility, Sovereign debt

    Derivatives Trading and the Volume-Volatility Link in the Indian Stock Market

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    This paper investigates the issue of temporal ordering of the range-based volatility and volume in the Indian stock market for the period 1995-2007. We examine the dynamics of the two variables and their respective uncertainties using a bivariate dual long-memory model. We distinguish between volume traded before and after the introduction of futures and options trading. We find that in all three periods the impact of both the number of trades and the value of shares traded on volatility is negative. This result is in line with the theoretical argument that a marketplace with a larger population of liquidity providers will be less volatile than one with a smaller population. We also find that (i) the introduction of futures trading leads to a decrease in spot volatility, (ii) volume decreases after the introduction of option contracts and, (iii) there are signifcant expiration day effects on both the value of shares traded and volatility series.derivatives trading; emerging markets; long-memory; range-based volatility; value of shares traded

    Theoretical Studies in Rotational Isomerism

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