Risk, drawdowns, and what you can actually hold

A drawdown is the fall from a peak to a subsequent low. If an investment goes from $10,000 to $5,300, that is a 47% drawdown — and it is not hypothetical: that is what happened to bitcoin over the twelve months to August 14, 2026.

The recovery arithmetic

Losses and gains are not symmetrical, and the asymmetry gets worse as losses deepen.

Why volatility is the wrong definition of risk

Finance textbooks often define risk as the standard deviation of returns. It is measurable, which is its main advantage.

But volatility only becomes a loss if you sell. For an investor with a thirty-year horizon and no forced liquidation, a volatile asset that compounds is not obviously riskier than a stable one that does not. The thing that converts volatility into permanent loss is a decision — usually made under stress, usually near the bottom.

The pre-commitment exercise

Before buying anything, write down the answers to three questions. In writing, before the position exists:

1. What decline is this asset historically capable of? Not what you expect — what the instrument has done. Equities have repeatedly fallen 30–50%. Individual stocks have fallen 90%. Bitcoin has fallen more than 50% several times.
2. At what size would that decline change my behaviour? A 50% fall in 2% of your portfolio is a 1% loss overall. The same fall in 40% of your portfolio is a 20% loss overall and a different psychological event entirely.
3. What would have to be true for me to sell? Define it in terms of the business or the thesis, not the price. 'I will sell if it drops 20%' is a guarantee of selling low, because price alone contains no information about whether you were wrong.

The gap between asset returns and investor returns

The return an asset publishes and the return its holders actually earn are different numbers. The difference comes from timing: money tends to arrive after strong performance and leave after weak performance, which mechanically buys high and sells low.

Closing that gap requires no forecasting skill whatsoever. It requires deciding in advance, and then doing what you decided.