Look-ahead bias occurs by using information not available or known in the analysis period for a study or simulation, leading to inaccurate results. An often-overlooked point regarding look-ahead bias is that it isn’t just about …
A time series is a sequence of moments-in-time observations. The sequence of data is either uniformly spaced at a specific frequency such as hourly or sporadically spaced in the case of a phone call log. …
Survivorship bias is the risk of analyzing investment performance using only “surviving” constituents of a selected investment universe instead of incorporating all current and historical constituents over the performance period. Survivorship bias artificially increases long …
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