Raphael Douady

I am mathematician and economist, specialized in quantitative finance and chaos theory. With more than fifteen years experience in the banking industry (risk management, option models, trading strategies) and thirty years research in pure and applied mathematics, I have developed highly sophisticated quantitative solutions and statistical analysis. A former fellow of Ecole Normale Supérieure in Paris, I earned my Ph.D. in 1982 in Hamiltonian dynamics and became strongly involved in Finance in 1993. Currently affiliated with University of Paris 1-Sorbonne Economic Center (CES) and the French National Center for Scientific Research (CNRS), I held the Frey chair professor of quantitative finance at Stony brook university. I have lead and organized numerous academic, as well as practitioner conferences around the world, including the New York University seminar of Mathematical Finance and Paris Europlace conferences. My most recent research topics are Hedge Funds risks, for which I have de

Notes3

• Quant employment verification: CONFIRMED. Douady held actual quantitative-finance roles, and his identity is supported across independent pages (Riskdata company team page, Wikipedia, Crunchbase, LinkedIn). Primary-source confirmation: Riskdata's own team page states he co-founded Riskdata in 1999 and has led its research as Research Director; Riskdata is a quantitative risk-analytics software vendor for buy-side institutions (risk managers, quants and portfolio managers) - classified as a quant-risk/fintech software vendor and specialist consultancy, NOT a proprietary-trading, market-making or asset-management firm. Separate roles are INDEX-ONLY (from the LinkedIn enrichment index, not independently confirmed against primary sources and therefore retained as reported-but-uncertain): Societe Generale 'Quantitative research' (1994-1995) and CIBC World Markets 'Quant research' (1996-2000), both banks with quantitative-research desks; QuantsUnited 'Senior Scientific Advisor' (2019-2023), classified as a quantitative-trading education/consulting firm (description: education and consulting on quantitative trading strategy design and selection), not an investment firm; NM Fin Tech 'Chief Research Officer' (2019-2021, algorithmic design), classified as a fintech firm. No student program, insight day, camp, scholarship or incoming offer is counted as employment here.
• Co-founded Riskdata (quantitative risk-analytics software for buy-side asset managers and hedge funds) and served as its Research Director - a fintech/quant-risk vendor role, not a proprietary-trading seat; the company itself states its models are for risk managers, quants, and portfolio managers.2000
• Held the Robert Frey Endowed Chair for Quantitative Finance at Stony Brook University (2015-2018) and led its Quantitative Finance MS/PhD program in Applied Math & Statistics.2015
• His PhD (1982) proved the equivalence of KAM theory for Hamiltonian systems and symplectomorphisms, opening discrete KAM theory, under Michael Herman; the same dynamical-systems toolkit (Lyapunov exponents, instability) later reappears in his Market Instability Indicator work.
• Developed 'Polymodels', a statistical/nonlinear theory of financial markets whose Stress VaR is an extended Basel III stress-test indicator, and (with Nassim Taleb) the mathematical foundations of fragility/antifragility theory.
• Current research is stated as chief/governing roles across multiple quant-finance entities simultaneously (Ninety One data-science committee, Datacore Innovations, Paris 1 Sorbonne, Riskdata Inc.), consistent with an academic-quant advisor profile rather than a single full-time employer - treat LinkedIn 'current' flags as of the index date, not verified today.2026
• 1988 Arnold-diffusion article proved a long-standing Arnold conjecture on topologically unstable elliptic orbits in dimension >=6, his most-cited pure-math result.1988
• Authored a generalization of the Heath-Jarrow-Morton interest-rate model using random-field yield curves, plus a rating-based credit-derivatives model introducing the 'rating surface', marking his shift into mathematical finance from 1994.
• Academic director of LabEx ReFi (French Laboratory of Excellence on Financial Regulation, 2013-2016), supervising ~60 researchers on financial-regulation economics.2013
• Born 15 November 1959 in Paris; son of mathematician Adrien Douady, an ENS alumnus.Nov 15, 1959