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Star Power: The Effect of Monrningstar Ratings on Mutual Fund Flow


  • Guercio, Diane Del
  • Tkac, Paula A.


We apply an event-study methodology on over 10,000 Morningstar star rating changes and find that Morningstar has subsantial independent influence on the investment allocation decisions of retail mutual fund investors. It is the discrete change in the star rating itself and not the change in the underlying performance measures that drives frow. We document econnomically and statistically significant positive abnormal flow following rating upgrades, and negative abnormal flow following rating downgrades. In contrast to the cross-sectional flow performance literature, we find evidence of investor punishment of performance declines, some of which is evident immediately in the month of the rating change.

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  • Guercio, Diane Del & Tkac, Paula A., 2008. "Star Power: The Effect of Monrningstar Ratings on Mutual Fund Flow," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 43(04), pages 907-936, December.
  • Handle: RePEc:cup:jfinqa:v:43:y:2008:i:04:p:907-936_01

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    References listed on IDEAS

    1. Brown, Stephen J & Goetzmann, William N, 1995. " Performance Persistence," Journal of Finance, American Finance Association, vol. 50(2), pages 679-698, June.
    2. Chevalier, Judith & Ellison, Glenn, 1997. "Risk Taking by Mutual Funds as a Response to Incentives," Journal of Political Economy, University of Chicago Press, vol. 105(6), pages 1167-1200, December.
    3. Blake, Christopher R. & Morey, Matthew R., 2000. "Morningstar Ratings and Mutual Fund Performance," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 35(03), pages 451-483, September.
    4. Boehmer, Ekkehart & Masumeci, Jim & Poulsen, Annette B., 1991. "Event-study methodology under conditions of event-induced variance," Journal of Financial Economics, Elsevier, vol. 30(2), pages 253-272, December.
    5. Bergstresser, Daniel & Poterba, James, 2002. "Do after-tax returns affect mutual fund inflows?," Journal of Financial Economics, Elsevier, vol. 63(3), pages 381-414, March.
    6. Brown, Keith C & Harlow, W V & Starks, Laura T, 1996. " Of Tournaments and Temptations: An Analysis of Managerial Incentives in the Mutual Fund Industry," Journal of Finance, American Finance Association, vol. 51(1), pages 85-110, March.
    7. Prem C. Jain & Joanna Shuang Wu, 2000. "Truth in Mutual Fund Advertising: Evidence on Future Performance and Fund Flows," Journal of Finance, American Finance Association, vol. 55(2), pages 937-958, April.
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