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Xavier Porterfield

Xavier Porterfield brings over 25 years of experience in FX markets and research, building models and exploring where ideas meet real-world application. As Head of Research at NCFX — the regulated Benchmark Administrator for FX spot and forward mid-rate benchmarks — Xavier works at the heart of how FX prices are made and measured.

Assets

Why Some Traders Go Bust: What Medieval Logic Knew That Your Backtest Doesn’t

Aristotle’s Square of Opposition and Why Traders Still Walk Off Cliffs Somewhere in a 9th century Carolingian monastery a logician diagrammed four sentences into a square to help him distinguish whether a statement was universally true, or only partially so. A thousand years later and that square can explain why…

Xavier Porterfield August 31, 2026 No Comments

Behavioral Sentiment

Foreign Exchange and Reading Through the Noise

Brief Clarity, Constantly Interrupted: What Does Copernicus Have To Do With FX? This article was first published the 7th of April on LinkedIn by the author.I have spent most of my professional life in foreign exchange markets – an environment that rewards the ability to read signal through noise. And…

Xavier Porterfield April 9, 2026 No Comments