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An empirical analysis on the efficiency of the microfinance investment market


  • Takeshi Inoue

    () (Institute of Developing Economies)

  • Shigeyuki Hamori

    () (Kobe University)


This paper empirically analyzes the market efficiency of microfinance investment funds. For the empirical analysis, we use an index of the microfinance investment funds and apply two kinds of variance ratio tests to examine whether or not this index follows a random walk. We use the entire sample period from December 2003 to June 2010 as well as two sub-samples which divide the entire period before and after January 2007. The empirical evidence demonstrates that the index does not follow a random walk, suggesting that the market of the microfinance investment funds is not efficient. This result is not affected by changes in either empirical techniques or sample periods.

Suggested Citation

  • Takeshi Inoue & Shigeyuki Hamori, 2011. "An empirical analysis on the efficiency of the microfinance investment market," Economics Bulletin, AccessEcon, vol. 31(3), pages 2725-2735.
  • Handle: RePEc:ebl:ecbull:eb-11-00518

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    References listed on IDEAS

    1. Chow, K. Victor & Denning, Karen C., 1993. "A simple multiple variance ratio test," Journal of Econometrics, Elsevier, vol. 58(3), pages 385-401, August.
    2. Andrew W. Lo, A. Craig MacKinlay, 1988. "Stock Market Prices do not Follow Random Walks: Evidence from a Simple Specification Test," Review of Financial Studies, Society for Financial Studies, vol. 1(1), pages 41-66.
    3. Jasmina Glisovic & Xavier Reille, 2010. "Microfinance Investors Adjust Strategy in Tougher Market Conditions," World Bank Other Operational Studies 9458, The World Bank.
    4. Kim, Jae H., 2006. "Wild bootstrapping variance ratio tests," Economics Letters, Elsevier, vol. 92(1), pages 38-43, July.
    5. Xavier Reille & Jasmina Glisovic-Mezieres & Yannis Berthouzoz & Damian Milverton, 2009. "MIV Performance and Prospects : Highlights from the CGAP 2009 MIV Benchmark Survey," World Bank Other Operational Studies 9490, The World Bank.
    6. Amélie Charles & Olivier Darné, 2009. "Variance-Ratio Tests Of Random Walk: An Overview," Journal of Economic Surveys, Wiley Blackwell, vol. 23(3), pages 503-527, July.
    7. Osamah M. Al-Khazali & David K. Ding & Chong Soo Pyun, 2007. "A New Variance Ratio Test of Random Walk in Emerging Markets: A Revisit," The Financial Review, Eastern Finance Association, vol. 42(2), pages 303-317, May.
    8. Fama, Eugene F, 1970. "Efficient Capital Markets: A Review of Theory and Empirical Work," Journal of Finance, American Finance Association, vol. 25(2), pages 383-417, May.
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    More about this item


    efficient market hypothesis; microfinance investment; variance ratio test;

    JEL classification:

    • O1 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development
    • F4 - International Economics - - Macroeconomic Aspects of International Trade and Finance


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