Muhammad Essa | Quant Dev | Trader @essaquant
I study why backtests fall apart out of sample. Overfitting, leakage, the costs nobody models. I share what I learn, including my own mistakes. Joined July 2025-
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My tests were 100% green and my validator called a coin flip a certainty. Same returns, honest number: 68.20%. The bug was units. An annualized Sharpe went into a formula that wants per-period. PSR is non-linear in SR, so it doesn't inflate. It saturates.
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