Vol. I · Essays

Essays on finance, risk,
and the mathematics of capital.

A quarterly journal about the ideas that quietly compound — position sizing, probability, market microstructure, and the long arithmetic of wealth. Written by Samet Sevindi.

Risk & position sizing April 21, 2026

Why 10× leverage makes you poorer, not richer

In 1956, a Bell Labs engineer solved a problem no one had bothered to formalize: what is the mathematically optimal size of a bet? The answer has been quietly running the world's most profitable hedge funds ever since, and almost everyone who trades with leverage is on the wrong side of it.

Read the essay