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Matthew Oshin
<- Writing

2026-06-19

Why I build

I'm a builder. That's the one word that survives every chapter. I started flipping sneakers in high school, scaled a research and signal company in college, did equity research on a hedge fund desk, and now I ship AI products end to end. Different surfaces, same instinct: find an edge, pressure test it, and build the thing that captures or distributes it.

Markets taught me the edge part. Code let me build it myself.

My first venture was Ocean Supply, sneaker arbitrage, which is where the ocean theme that runs through everything I've built since actually comes from. Buy mispriced, sell into demand, learn why certain releases command certain prices. The realization that shaped everything after: I was paying other people for the information that made me money. The edge was the signal, not the shoe.

That turned into communities, then Mocean, then a hedge fund seat, then leading an AI lab, and now building products like Sigma where markets reasoning ships as software. I'm happiest one layer up the stack, building the system that gives other people an edge.

This is where I'll write about what I'm building and what I'm learning. More soon.