Lyuboslav Nikolaev Panchev

Quantitative Researcher at Susquehanna International Group (SIG), the global quantitative trading firm and market maker. PhD in Mathematics from MIT (2019, algebraic topology) and B.S. from Stanford University (2014). Former IMO gold medalist for Bulgaria (2009, 2010; silver 2008). At SIG he began on volatility modeling in equity options and now also serves as a quant hiring manager supporting onboarding and education for new quant hires.

Notes23

• Quant employment verification: CONFIRMED. He has held an actual paid role as a Quantitative Researcher at Susquehanna International Group (SIG) in Chicago, corroborated by three independent first-party/authoritative sources beyond any index: SIG's own NeurIPS 2025 speaker bio ('Lyubo is a Quantitative Researcher at Susquehanna... PhD in Mathematics from MIT'), a Yale Statistics department event page (Oct 24, 2025) stating 'Lyubo Panchev is a Quantitative Researcher at Susquehanna... worked on volatility modeling in equity options', and a Physics World feature / MIT CAPD piece describing him as 'a quant at Susquehanna with seven years at the firm'. Employer classification: SIG (sig.com) is a global quantitative/proprietary trading firm and market maker, i.e. genuine quantitative finance, not a name containing 'quant' alone. The LinkedIn profile is index-enrichment derived, but identity is independently supported: the MIT PhD thesis PDF names 'Lyuboslav Panchev, B.S., Stanford University (2014)' and the SIG/Physics World profiles describe the same MIT-PhD/IMO-gold-medalist background, tying the olympiad identity to the quant role.Oct 24, 2025
• Identity tie across sources: the MIT Mathematics PhD thesis 'On the $v_1$-periodicity of the Moore space' is authored by 'Lyuboslav Panchev, B.S., Stanford University (2014)', and both SIG's and Yale's bios describe an MIT-PhD mathematician who is a former IMO gold medalist; the IMO official record shows the only Bulgarian Lyuboslav (Nikolaev) Panchev as IMO 2008-2010. The three signals (IMO record, Stanford->MIT math PhD, SIG quant role) converge on one person.Jun 2019
• Career arc inside SIG: started on volatility modeling in equity options, then transitioned to a quant hiring manager role supporting onboarding and education of new quant hires, per his own Yale careers-talk bio (Oct 2025) — a shift from individual research toward recruiting/mentoring that also makes him a public-facing entry point for quant candidates.Oct 24, 2025
• Completed his PhD in Mathematics at MIT in June 2019 (thesis defended April 29, 2019; committee Haynes Miller (advisor), Michael Hopkins, Zhouli Xu); he joined SIG in August 2019, a roughly two-month gap consistent with moving directly from the PhD into the quant role.Apr 29, 2019
• Won gold medal for Bulgaria at IMO 2010 with 29 points (rank 18, 96.7th percentile).Jul 2010
• Won gold medal for Bulgaria at IMO 2009 with 32 points (rank 44, 92.4th percentile).Jul 2009
• Won silver medal for Bulgaria at IMO 2008 with 25 points (rank 92, 83rd percentile); three consecutive IMO appearances 2008-2010.Jul 2008
• Susquehanna International Group (sig.com) is a global quantitative proprietary trading firm and market maker (HQ Bala-Cynwyd, PA); classification confirmed as genuine quantitative finance. No public evidence was found of any other employer (bank, asset manager, energy or crypto trading firm, or hedge fund) beyond SIG; his only documented professional role is at SIG.
• Described in April 2026 Physics World / MIT CAPD features as an MIT PhD (Mathematics) alum working as a quant at Susquehanna, discussing quant collaboration across a wide range of instruments; the Physics World piece appears as a Susquehanna recruiting feature, so it is partly company-sponsored rather than independent journalism.Apr 2026
• Represented SIG at NeurIPS 2025 (San Diego, Dec 2-7, 2025) as an ML/HPC/systematic-trading expert at the company booth, showing his current work sits in SIG's machine-learning/systematic-trading effort alongside the hiring/education role.Dec 2025
• As a Stanford undergraduate he co-authored 'On discontinuity of planar optimal transport maps' (J. Topol. Anal., 2015) with O. Chodosh, V. Jain, M. Lindsey and Y. Rubinstein, arising from a SURIM summer research project; arXiv preprint 1312.2929. Demonstrates research output predating his MIT PhD.2015
• Served as a research mentor in MIT Mathematics' SPUR undergraduate summer program (e.g. Anderson Wang, 'Invariants of machines in wiring diagrams', suggesting he gave back to the department's research pipeline during his PhD years, 2014-2019.2015