Why a clean backtest is the first thing to distrust
Why the first number worth distrusting is the backtest itself, and what walk-forward evidence actually shows.
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Free editorial articles on the role of AI in investment and the limits of price prediction. Read, share, and inquire; nothing is sold.
Regime change: the break the model cannot see coming
A market is not a stationary process. The break a model cannot see coming is also the break that breaks the model.
Your trade moves the price: why paper alpha rarely survives
A signal that looks strong on a spreadsheet often weakens the moment it is traded. Three places where the gap opens.