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Re:Understanding Jane Street by hackerlight on Tuesday August 02, 2022 @01:17AM (#32315380)
> Hell, their own former employees could theoretically compete against them

That happens, with mixed levels of success. But these firms are more than just IP. Their moat is:

- Lower fees, negotiated based on their volume and relationships. Crucial given margins of 0.02%.

- A well-oiled machine that makes the machine. This includes culture, branding into recruitment pipeline, and so on.

- IP has a short half-life. The machine that makes the machine is more important.

- Scale advantages -- code sharing between teams and asset classes, which is hard to replicate in a small group.

- You need to have perfect execution on every vertical to have a good shot. Devs, researchers, operators, relationships.

It's also common for that IP to not all be known by a single person. Division of labor can be used to protect IP.

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