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Giffen Goods and Market Making

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Abstract

This paper shows that information effects per se are not responsible for the Gi®en goods anomaly affecting competitive traders' demands in multi-asset, noisy rational expectations equilibrium models. The role that information plays in traders' strategies also matters. In a market with risk averse, uninformed traders, informed agents have a dual motive for trading: speculation and market making. While speculation entails using prices to assess the effect of private signal error terms, market making requires employing them to disentangle noise traders' effects in traders' aggregate orders. In a correlated environment, this complicates a trader's signal-extraction problem and may generate upward-sloping demand curves. Assuming either (i) that competitive, risk neutral market makers price the assets, or that (ii) the risk tolerance coefficient of uninformed traders grows without bound, removes the market making component from informed traders' demands, rendering them well behaved in prices.

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  • Giovanni Cespa, 2003. "Giffen Goods and Market Making," CSEF Working Papers 97, Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy.
    • Handle: RePEc:sef:csefwp:97
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    Cited by:

    1. Giovanni Cespa, 2004. "A Comparison of Stock Market Mechanisms," RAND Journal of Economics, The RAND Corporation, vol. 35(4), pages 803-824, Winter.
    2. Vives, Xavier & Cespa, Giovanni, 2011. "Expectations, Liquidity, and Short-term Trading," CEPR Discussion Papers 8303, C.E.P.R. Discussion Papers.
    3. Giovanni Cespa & Xavier Vives, 2015. "The Beauty Contest and Short-Term Trading," Journal of Finance, American Finance Association, vol. 70(5), pages 2099-2154, October.

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    More about this item

    Keywords

    financial economics; asset pricing; information and market efficiency;
    All these keywords.

    JEL classification:

    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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