Comprehensive and Detailed Explanation From Exact Extract:
Survivorship bias occurs when poor-performing funds are closed, excluding them from performance rankings and inflating the perceived performance of surviving funds. The feedback from the document states:
"All comparison universes also exhibit some degree of survivorship bias no matter how carefully the universes are constructed. Survivorship bias develops as defunct portfolios drop out and are excluded from rankings in subsequent quarters. A performance universe is essentially a universe of survivors."
[Reference:Chapter 14 – Understanding Mutual Fund PerformanceLearning Domain:Evaluating and Selecting Mutual Funds, ]
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