Why testing many ideas finds lucky ones
See why trying lots of versions throws up lucky winners, and how the Deflated Sharpe Ratio adjusts for it.
Module 15 of 26, Testing an idea honestly before you use it. Lesson 2 of 8, about 18 minutes.
The takeaway
The list of everything you tried is part of the evidence.
This page is a public summary. The full lesson has the worked examples, an interactive exercise and a short quiz, and sits in the course. Lessons 1 and 2 of Module 1 are free and the rest need a pass.
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