Overview of IBES on WRDS: Research and Data Issues

Relationship between Summary and Detail History ... AMZN 20-May-98 20-May-98 86 42186 -2.5 -0.517 26-Jan-99 31-Dec-98 ... Microsoft split 2-for-1 on Apr 12, 1990 and they reported earnings on Apr 17, 1990, whereas IBES effective split date was April 19, 1990 ................
................