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Additions to Market Indices and the Comovement of Stock Returns around the World

Author

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  • Claessens, Stijn
  • Yafeh, Yishay

Abstract

We investigate company additions to stock market indices over a six-year period in 39 developed and emerging markets around the world. For most markets, we find a post-inclusion increase in beta and an increase in the explanatory power of market returns (R2), reflecting increased comovement after inclusion between the added stock and rest of the index. In addition, for most markets there is a post-inclusion increase in stock turnover. These inclusion effects increase over time, tend to be stronger when the index is dispersed (i.e., includes many stocks), and in “common law” countries. These patterns appear to be inconsistent with the view that stock returns are generated by fundamentals only and are consistent with the category/habitat view of Barberis, Shleifer and Wurgler (2005). In line with this interpretation, we present evidence that the post-inclusion increase in comovement is positively correlated with the presence of index-oriented institutional investors in the market. We also present tentative evidence suggesting that, in less developed markets, the post-inclusion increase in comovement is related to information problems.

Suggested Citation

  • Claessens, Stijn & Yafeh, Yishay, 2008. "Additions to Market Indices and the Comovement of Stock Returns around the World," CEPR Discussion Papers 7052, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:7052
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    References listed on IDEAS

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    1. Jerry Coakley & Periklis Kougoulis & John C. Nankervis, 2014. "Comovement and FTSE 100 index changes," International Journal of Behavioural Accounting and Finance, Inderscience Enterprises Ltd, vol. 4(2), pages 93-112.
    2. Rafael Porta & Florencio Lopez-De-Silanes & Andrei Shleifer, 2006. "What Works in Securities Laws?," Journal of Finance, American Finance Association, vol. 61(1), pages 1-32, February.
    3. Bryan Mase, 2008. "Comovement in the FTSE 100 Index," Applied Financial Economics Letters, Taylor and Francis Journals, vol. 4(1), pages 9-12.
    4. De Nicolò, Gianni & Laeven, Luc & Ueda, Kenichi, 2008. "Corporate governance quality: Trends and real effects," Journal of Financial Intermediation, Elsevier, vol. 17(2), pages 198-228, April.
    5. Randall Morck & Bernard Yeung & Wayne Yu, 1999. "The Information Content of Stock Markets: Why Do Emerging Markets Have Synchronous Stock Price Movements?," Harvard Institute of Economic Research Working Papers 1879, Harvard - Institute of Economic Research.
    6. Barberis, Nicholas & Shleifer, Andrei, 2003. "Style investing," Journal of Financial Economics, Elsevier, vol. 68(2), pages 161-199, May.
    7. Aditya Kaul & Vikas Mehrotra & Randall Morck, 2000. "Demand Curves for Stocks "Do "Slope Down: New Evidence from an Index Weights Adjustment," Journal of Finance, American Finance Association, vol. 55(2), pages 893-912, April.
    8. Jin, Li & Myers, Stewart C., 2006. "R2 around the world: New theory and new tests," Journal of Financial Economics, Elsevier, vol. 79(2), pages 257-292, February.
    9. Bank for International Settlements, 2007. "Institutional investors, global savings and asset allocation," CGFS Papers, Bank for International Settlements, number 27.
    10. Ferreira, Miguel A. & Matos, Pedro, 2008. "The colors of investors' money: The role of institutional investors around the world," Journal of Financial Economics, Elsevier, vol. 88(3), pages 499-533, June.
    11. Harford, Jarrad & Kaul, Aditya, 2005. "Correlated Order Flow: Pervasiveness, Sources, and Pricing Effects," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 40(01), pages 29-55, March.
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    14. repec:hrv:faseco:30747193 is not listed on IDEAS
    15. Bhattacharya, Utpal & Galpin, Neal, 2011. "The Global Rise of the Value-Weighted Portfolio," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 46(03), pages 737-756, June.
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    Cited by:

    1. Honghui Chen & Vijay Singal & Robert F. Whitelaw, 2015. "Comovement Revisited," NBER Working Papers 21281, National Bureau of Economic Research, Inc.
    2. repec:eee:quaeco:v:68:y:2018:i:c:p:143-157 is not listed on IDEAS
    3. Hacıbedel, Burcu, 2014. "Does investor recognition matter for asset pricing?," Emerging Markets Review, Elsevier, vol. 21(C), pages 1-20.

    More about this item

    Keywords

    Beta; Comovement; Index inclusion;

    JEL classification:

    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets

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