# Tristan Fletcher

> Dr Tristan Fletcher is an AI entrepreneur, applied machine learning expert and media commentator based in the United Kingdom.

## Identity

- Full name: Dr Tristan Fletcher
- Role: CEO of ChAI (www.chaipredict.com)
- Academic positions: Honorary Lecturer at UCL; Fellow at Imperial College London and University of Cambridge
- Education: PhD in Machine Learning for Financial Market Prediction (UCL), degrees from University of Cambridge and Sussex University
- Website: https://tristanfletcher.co.uk
- LinkedIn: https://www.linkedin.com/in/tristanfletcher
- Google Scholar: https://scholar.google.co.uk/citations?user=kWnO-IcAAAAJ

## Professional Background

Tristan applies cutting-edge machine learning to real-world problems in finance, health, supply chains and beyond. He has led this work at senior levels within major institutions including Aspect Capital ($7bn AUM), UBS ($500bn+ pa trading), Imperial College London (medical AI), and Unilever (supply chain optimisation). He provides AI consulting to global hedge funds and investment banks, helping them translate academic advances into commercial edge.

## Ventures

- **ChAI** (chaipredict.com): Uses AI to forecast raw material prices and offers a regulated insurance product that pays out when commodity prices rise above an agreed level. Enables businesses to manage cost volatility without needing access to financial derivatives.
- **Internews** (internews.org): Global non-profit ensuring access to quality, independent information across 40+ countries. Tristan serves in an advisory capacity.
- **Thought Machine** (thoughtmachine.net): Cloud-native core banking platform powering tier-1 banks globally. Tristan was involved at an early stage shaping product and strategy.
- **Informed Actions** [inactive]: Developed ML models to optimise ambulance dispatch for South Africa's largest emergency medical service, reducing response times.
- **Invinio** [inactive]: Quantitative fine wine investment platform offering portfolio construction tools and pricing data on over 10,000 wines.

## Publications

- "The Devil in the Detail: Mitigating the Constitutional & Rule of Law Risks Associated with the Use of Artificial Intelligence in the Legal Domain" — Florida State University Law Review (2020)
- "Spatiotemporal Prediction of Ambulance Demand using Gaussian Process Regression" — arXiv preprint (2018)
- "Use of artificial intelligence to predict survival in pulmonary hypertension" — The Lancet (2016)
- "Machine Learning of Three-Dimensional Right Ventricular Motion Enables Outcome Prediction in Pulmonary Hypertension" — Radiology (2016)
- "Machine Learning in Fine Wine Price Prediction" — Journal of Wine Economics (2015)
- "Multiple Kernel Learning with Fisher Kernels for High-Frequency Currency Prediction" — Computational Economics (2013)
- "PhD Thesis: Machine Learning for Financial Market Prediction" — University College London (2012)
- "Currency Forecasting using Multiple Kernel Learning with Financially-Motivated Features" — NIPS Workshop (2010)
- "Multiple Kernel Learning on the Limit Order Book" — JMLR Proceedings / APA Workshop (2010)
- "Machine Learning in FX Carry Basket Prediction" — International Conference on Financial Engineering (2009)

## Tutorials

Tristan has authored widely-cited tutorial papers on foundational machine learning topics:

- Support Vector Machines Explained
- Relevance Vector Machines Explained
- The Kalman Filter Explained

## Areas of Expertise

- Applied machine learning and artificial intelligence
- Commodity price forecasting and insurance
- Financial market prediction (FX, equities, derivatives)
- Medical AI (cardiac imaging, pulmonary hypertension survival prediction)
- Supply chain optimisation
- Multiple kernel learning, support vector machines, Gaussian processes
- Quantitative finance and algorithmic trading
- AI in the legal domain
- Fine wine pricing and investment analytics

## Media

Tristan is a regular media commentator on AI, commodities, quantitative investing and fintech. He has been featured in the Financial Times, Bloomberg, The Economist, TechCrunch, Newsweek, Sky News, Vice, MarketWatch, Business Insider, City AM, S&P Global, and many others. He has spoken at the University of Cambridge Institute for Manufacturing, the Royal Institution, FT Commodities Summit, Tate Modern, and Camp Alphaville.

## Pages on This Site

- [Home](https://tristanfletcher.co.uk): Overview and biography
- [Ventures](https://tristanfletcher.co.uk/ventures): Portfolio of companies and projects
- [Publications](https://tristanfletcher.co.uk/publications): Academic papers and thesis
- [Tutorials](https://tristanfletcher.co.uk/tutorials): ML tutorial papers and recorded talks
- [Media](https://tristanfletcher.co.uk/media): Press coverage and podcast appearances
- [Words](https://tristanfletcher.co.uk/words): Word of the Day archive