mcsio

Notes on risk, rules, and running a concentrated portfolio without getting shaken out of it — or blowing it up by accident.

Writing

Seventy percent of my drawdown was money I deployed after the peak

A post-mortem of a 20.3% drawdown on a concentrated, unlevered semiconductor book, and the twelve-rule system rebuilt from it. No price-structure rule fires at an all-time high — which turns out to be the whole problem.

Apps

LineAlert for iPhone

Which side of the line is each stock on? EMA8 against EMA20 on daily closes, one arrow per ticker, a push the day it flips. Coming to the App Store.

Get in touch

Do you have written rules for when you sell — and did you write them before or after you needed them?