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Giffen Goods and Market Making

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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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Bibliographic Info

Paper provided by Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy in its series CSEF Working Papers with number 97.

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Date of creation: 02 May 2003
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Publication status: Published in Economic Theory, 2005, vol. 25, pages 983-997
Handle: RePEc:sef:csefwp:97

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Keywords: financial economics; asset pricing; information and market efficiency;

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  1. Diamond, Douglas W. & Verrecchia, Robert E., 1981. "Information aggregation in a noisy rational expectations economy," Journal of Financial Economics, Elsevier, vol. 9(3), pages 221-235, September.
  2. Gerard Gennotte and Hayne Leland., 1989. "Market Liquidity, Hedging and Crashes," Research Program in Finance Working Papers RPF-184, University of California at Berkeley.
  3. Sanford J Grossman & Joseph E Stiglitz, 1997. "On the Impossibility of Informationally Efficient Markets," Levine's Working Paper Archive 1908, David K. Levine.
  4. Vives, Xavier, 1995. "Short-Term Investment and the Informational Efficiency of the Market," Review of Financial Studies, Society for Financial Studies, vol. 8(1), pages 125-60.
  5. Bhattacharya Utpal & Reny Philip J. & Spiegel Matthew, 1995. "Destructive Interference in an Imperfectly Competitive Multi-Security Market," Journal of Economic Theory, Elsevier, vol. 65(1), pages 136-170, February.
  6. Vives Xavier, 1995. "The Speed of Information Revelation in a Financial Market Mechanism," Journal of Economic Theory, Elsevier, vol. 67(1), pages 178-204, October.
  7. Giovanni Cespa, 2000. "Short-term investment and equilibrium multiplicity," Economics Working Papers 520, Department of Economics and Business, Universitat Pompeu Fabra, revised Jun 2002.
  8. Barlevy, Gadi & Veronesi, Pietro, 2003. "Rational panics and stock market crashes," Journal of Economic Theory, Elsevier, vol. 110(2), pages 234-263, June.
  9. Kyle, Albert S, 1985. "Continuous Auctions and Insider Trading," Econometrica, Econometric Society, vol. 53(6), pages 1315-35, November.
  10. Hellwig, Martin F., 1980. "On the aggregation of information in competitive markets," Journal of Economic Theory, Elsevier, vol. 22(3), pages 477-498, June.
  11. Admati, Anat R, 1985. "A Noisy Rational Expectations Equilibrium for Multi-asset Securities Markets," Econometrica, Econometric Society, vol. 53(3), pages 629-57, May.
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Cited by:
  1. Giovanni Cespa, 2003. "A comparison of stock market mechanisms," Working Papers 50, Barcelona Graduate School of Economics.

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