In Finance, Survivorship Bias
What is In Finance, Survivorship Bias?
Survivorship bias is the reasonable fault of change on the people or things that “survived” some process and ignoring those that didn’t. Normally concern to fund manager or individual investor performance. Suppose we examined the performance over the last ten years of a group of managers that exist today.
This performance is biased upwards coz we are only consider those that survived for 10 years. In finance, individual bias is the tendency for failed companies to be excluded from performance studies coz they no longer exist. It frequently causes the results of studies to skew higher coz only companies which were productive sufficient to survive until the end of the period are excluding.
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