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On the Reliability of I/B/E/S Earnings Announcement Dates and Forecasts


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  • Daniella Acker
  • Nigel W. Duck


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    We add to the concerns raised in Ljungqvist, Malloy and Marston, 2009, Rewriting History, Journal of Finance, 64, 1935-1960, about the reliability of the I/B/E/S data provided by Thomson Reuters (TR). Many of the dates reported as earnings announcement dates are not earnings announcement dates; there are inconsistencies between these dates and those reported in Worldscope, another TR database; and summaries of financial analysts’ forecasts can be misleading. Following discussions with the authors, TR has reviewed approximately 2 million records and is in the process of correcting some 50,000 of them. Further reviews are under way.

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    Bibliographic Info

    Paper provided by Department of Economics, University of Bristol, UK in its series Bristol Economics Discussion Papers with number 09/611.

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    Length: 17 pages
    Date of creation: Nov 2009
    Date of revision:
    Handle: RePEc:bri:uobdis:09/611

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    Keywords: I/B/E/S; Worldscope; earnings announcements; analysts’ forecasts;

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