find the flaw exercise
Crack the suspicious strategy case.
Study the case file and identify the fatal research flaw.
Use Tab and arrow controls · Enter checks CASE FILE · Backtest DetectiveEXHIBIT AUniverse uses today's index members EXHIBIT BDelisted and acquired companies disappear EXHIBIT CReported Sharpe: 2.1
A 2005–2025 backtest buys the ten best current S&P 500 companies each January.
One flaw changes the entire conclusion.