Chen

Quant finance explainers, prediction markets and Jev build lists

Most of the feed is short explainers on quant finance concepts over video clips: PCA factors, dealer gamma, volatility risk premium, payment for order flow, the Heston model and classic papers by Markowitz, Grossman-Stiglitz and Ole Peters. Earlier posts covered US politics and Iran markets on Bullpen with referral links. Since late September it posts lists of GitHub projects built on the Jev API.

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writes for English-speaking retail traders curious how quant desks and options market makers think · Worldwide, in English

what they post about

share of their 40 recent posts

Quant finance explainers50%

Political prediction markets25%

Jev API project lists15%

Math and science history10%

what you can buy

prices are per publication

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Long-form X article

A long piece on X — the format people find later, not only in the timeline.

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what usually flies

their posts by reach · 185,727 views on record

It Takes 7 Backtests to Fake an Edge That Was Never There15 jul 26 · x post108kviews61likessee it →

A top math journal takes an average of 2 years to referee a paper. This one took 3 weeks. This is Yitang Zhang, 2013, a lecturer at the University of New Hampsh8 aug 26 · x post27kviews65likessee it →

a quant at aqr told me his desk doesn't track 500 stocks they track 5 numbers that move all 500 i thought he was oversimplifying. then he drew it on a napkin an15 jul 26 · x post19kviews135likessee it →

a 25-year-old grad student wrote 14 pages in 1952 and every risk desk on earth still runs on them his name was harry markowitz. he got a nobel for it 38 years l18 jul 26 · x post11kviews80likessee it →

Citadel isn't trading against other traders it's trading 5 forces the rest of the market can't see quant desks figured this out decades ago with principal compo16 jul 26 · x post10kviews93likessee it →

my uncle sold every stock he owned for a number that pays $5 a year sounds like nothing. it let him retire two years later no leverage. no timing. no earnings c17 jul 26 · x post10kviews27likessee it →

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