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Portfolios of Agricultural Market Advisory Services: How Much Diversification Is Enough?

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  • Cabrini, Silvina M.
  • Stark, Brian G.
  • Irwin, Scott H.
  • Good, Darrel L.
  • Martines-Filho, Joao

Abstract

This study analyzes the potential risk-reduction gains from naive diversification among market advisory services for corn and soybeans. The total possible decrease in risk through naive diversification is small, mainly because advisory prices are highly correlated on average. Moreover, because marginal risk-reduction benefits decrease rapidly with size and the cost of holding the portfolios increases linearly due to services' subscription fees, it is optimal to limit portfolio size to a few advisory programs. Based on certainty equivalent measures and two representative risk-aversion levels, preferred portfolio sizes are between one and three programs.

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  • Cabrini, Silvina M. & Stark, Brian G. & Irwin, Scott H. & Good, Darrel L. & Martines-Filho, Joao, 2005. "Portfolios of Agricultural Market Advisory Services: How Much Diversification Is Enough?," Journal of Agricultural and Applied Economics, Cambridge University Press, vol. 37(1), pages 101-114, April.
    • Handle: RePEc:cup:jagaec:v:37:y:2005:i:01:p:101-114_00
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    1. Elton, Edwin J & Gruber, Martin J & Urich, Thomas J, 1978. "Are Betas Best?," Journal of Finance, American Finance Association, vol. 33(5), pages 1375-1384, December.
    2. Ron Bird & Mark Tippett, 1986. "Note---Naive Diversification and Portfolio Risk---A Note," Management Science, INFORMS, vol. 32(2), pages 244-251, February.
    3. Atanu Saha & C. Richard Shumway & Hovav Talpaz, 1994. "Joint Estimation of Risk Preference Structure and Technology Using Expo-Power Utility," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 76(2), pages 173-184.
    4. William F. Sharpe, 1963. "A Simplified Model for Portfolio Analysis," Management Science, INFORMS, vol. 9(2), pages 277-293, January.
    5. Sharpe, William F., 1967. "Portfolio Analysis," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 2(2), pages 76-84, June.
    6. Good, Darrel L. & Martines-Filho, Joao Gomes & Irwin, Scott H., 2002. "The Pricing Performance Of Market Advisory Services In Corn And Soybeans Over 1995-2000," AgMAS Project Research Reports 14784, University of Illinois at Urbana-Champaign, Department of Agricultural and Consumer Economics.
    7. John L. Evans & Stephen H. Archer, 1968. "Diversification And The Reduction Of Dispersion: An Empirical Analysis," Journal of Finance, American Finance Association, vol. 23(5), pages 761-767, December.
    8. William P. Lloyd & John H. Hand & Naval K. Modani, 1981. "The Effect Of Portfolio Construction Rules On The Relationship Between Portfolio Size And Effective Diversification," Journal of Financial Research, Southern Finance Association;Southwestern Finance Association, vol. 4(3), pages 183-193, September.
    9. Schroeder, Ted C. & Parcell, Joseph L. & Kastens, Terry L. & Dhuyvetter, Kevin C., 1998. "Perceptions Of Marketing Strategies: Producers Versus Extension Economists," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 23(1), pages 1-15, July.
    10. Szpiro, George G, 1986. "Measuring Risk Aversion: An Alternative Approach," The Review of Economics and Statistics, MIT Press, vol. 68(1), pages 156-159, February.
    11. Elton, Edwin J & Gruber, Martin J, 1977. "Risk Reduction and Portfolio Size: An Analytical Solution," The Journal of Business, University of Chicago Press, vol. 50(4), pages 415-437, October.
    12. Statman, Meir, 1987. "How Many Stocks Make a Diversified Portfolio?," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 22(3), pages 353-363, September.
    13. Frankfurter, George M. & Phillips, Herbert E. & Seagle, John P., 1976. "Performance of the Sharpe Portfolio Selection Model: A Comparison," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 11(2), pages 195-204, June.
    14. Hagedorn, Lewis A. & Irwin, Scott H. & Martines-Filho, Joao Gomes & Good, Darrel L. & Sherrick, Bruce J. & Schnitkey, Gary D., 2003. "New Generation Grain Marketing Contracts," AgMAS Project Research Reports 14782, University of Illinois at Urbana-Champaign, Department of Agricultural and Consumer Economics.
    15. Webber, Rick L. & Irwin, Scott H. & Good, Darrel L. & Martines-Filho, Joao Gomes, 2003. "Evaluation Of Market Advisory Service Performance In Hogs," 2003 Conference, April 21-22, 2003, St. Louis, Missouri 18980, NCR-134 Conference on Applied Commodity Price Analysis, Forecasting, and Market Risk Management.
    16. Isengildina, Olga & Pennings, Joost M.E. & Irwin, Scott H. & Good, Darrel L., 2004. "Crop Farmers’ Use of Market Advisory Services," AgMAS Project Research Reports 37489, University of Illinois at Urbana-Champaign, Department of Agricultural and Consumer Economics.
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    Cited by:

    1. Irwin, Scott H. & Good, Darrel L. & Martines-Filho, Joao Gomes & Batts, Ryan M., 2006. "The Pricing Performance of Market Advisory Services in Corn and Soybeans Over 1995-2004," AgMAS Project Research Reports 37513, University of Illinois at Urbana-Champaign, Department of Agricultural and Consumer Economics.
    2. Batts, Ryan M. & Irwin, Scott & Good, Darrel, 2009. "The Pricing Performance of Market Advisory Services in Wheat Over 1995-2004," AgMAS Project Research Reports 183426, University of Illinois at Urbana-Champaign, Department of Agricultural and Consumer Economics.
    3. Irwin, Scott H. & Martines-Filho, Joao Gomes & Good, Darrel L., 2003. "The Pricing Performance of Market Advisory Services in Corn and Soybeans Over 1995-2001," AgMAS Project Research Reports 37510, University of Illinois at Urbana-Champaign, Department of Agricultural and Consumer Economics.
    4. Good, Darrel L. & Irwin, Scott H. & Martines-Filho, Joao Gomes & Hagedorn, Lewis A., 2005. "The Pricing Performance of Market Advisory Services in Corn and Soybeans over 1995-2003," AgMAS Project Research Reports 14775, University of Illinois at Urbana-Champaign, Department of Agricultural and Consumer Economics.

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    More about this item

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • Q10 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - General
    • Q12 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Micro Analysis of Farm Firms, Farm Households, and Farm Input Markets
    • Q14 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Finance

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