Backfill bias: related pages

The testing of a financial model by using it on past date and then comparing the 'predictions' to what actually happened.

The difference between the rate of return on a security (or a market or an investment) and the risk free rate of return.

The distortion of statistics that occurs when the people or organisations being sampled can decide on their own inclusion in the sample.

The exaggeration of returns because calculations fail to include securities or markets that have ceased to existed.

The tendency to favour evidence which supports a particular conclusion. Hard to avoid, especially in financial modelling.

Any of several types of bias caused by changes over time or the inclusion of data not available in a period being modelled.