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Rick Sullivan 🦆's avatar

This is solid wisdom. The spider chart metaphor is particularly good - most retail investors I talk to don't even know what their edges are, let alone how to measure them against the power law threshold. Point 10 (adverse selection) is the most important one for my readers. When you're a retail investor and you see a "bargain," understand that the algorithm likely missed it, and the fund with 40 analysts and Bloomberg terminals passed on it. You are usually missing something.

Point 18 needs emphasis. Yes, trading is zero-sum. The house always takes a cut. Every trade, someone's skimming - the exchange, the market maker, the broker. It's a zero-sum game where the sum is actually negative for participants. The only way retail survives is by not playing the high-frequency game at all. Find your edge in patience, in research the algos don't care about, in timelines measured in years, not milliseconds. The game isn't fair. Knowing it isn't fair is itself an edge.

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Strategy Master's avatar

I have written a similar piece…

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