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Sean Gong — Ex-Citadel Options Trader
Entropnt · 2026-06-23 · via Hacker News

FROMSean Gong <PERSON>Ex-Citadel Options Traderlinkedin.com/in/s-gongTOYOU <GUEST>SENT------ --:--:--REread me, then ping me on the right →

Hi — thanks for opening this.

For four years I made markets in single-stock options at Citadel Securities — quoting two-sided prices in ~100,000 options across nearly 300 stocks in India and Hong Kong, and managing the risk that piled up when everyone traded against me. I traded semi-systematically: most of our edge lived in models and algorithms we'd built, but a person still decided when to trust them.

I helped automate the desk so each of us covered 3x what traders elsewhere could, and wrote the 15,000-word manual for the traders behind me — which is really what this site is. Most independent traders aren't beaten by missing information; they're beaten by approaching trading wrong.

I'm here for one thing: helping you build a robust trading strategy — by running your idea through the way the market-making desk on the other side thinks. Not signals, not options theory, not a verdict on your portfolio.

The lens we'll think through:

  1. 1) Is the edge real?Where do you think the price is wrong? And why hasn't the market already taken the opportunity? If the reason's obvious, the 'edge' is usually someone on the other side knowing more than you.
  2. 2) How big should you go?Not gut feel — the desk answer is Position = Edge / Variance: bigger when the edge is clean, smaller when it's noisy. We land on a rule you can actually follow.
  3. 3) Can you actually capture it?An edge on paper isn't an edge. We check it survives costs, execution and the venue — whether the market's even deep enough to pay you for the view.

So open the IM on your right and bring me an idea — a view, a hunch, a market you keep watching. We'll think it into a real trade together, and you'll leave with a strategy report: an honest read on it through a Citadel quant's eyes, plus clear next steps to get it trading profitably in production.

Educational use only — AI-generated persona, not investment advice, not real-time data. A Bloomberg-style homage; not affiliated with or endorsed by Bloomberg L.P.