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Markets / Trading

Pairs Trading with Kalman Filters: Dynamic Hedge Ratios

Why a static OLS beta falls short: estimating a time-varying hedge ratio with a state-space model and building a cointegration strategy.

Jul 08, 2026 · 14 min read
Markets / Trading

The Silent Killers of Backtests: Look-Ahead and Survivorship Bias

Why do strategies that look great on paper collapse live? Common methodological errors, shown with example code.

Jun 10, 2026 · 15 min read

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