It is not. It is about the size of the position *relative to the liquidity you can actually access when the market stops being polite*. The last few weeks have been a masterclass in that distinction. Crowded trades that looked infinitely liquid on paper turned into one-way streets when everyone tried to leave at the same time. The bid simply was not there. That is not a market failure; that is a structural feature of how modern markets work. And it is precisely why we spend more time on exit scenarios than on entry narratives.
Position sizing is not a number, it is a relationship
When we build a portfolio, we do not ask "how much can we make?" We ask "how much can we lose before we are forced to act irrationally?" The answer determines the size. If a position is so large that a 10% move forces you to sell into weakness, you have not sized it for the market; you have sized it for your own comfort. The market does not care about your comfort. It will test the weakest link in the chain, and that link is usually the investor who overstayed their welcome because they confused conviction with size.
Liquidity is a privilege, not a right
We have seen this pattern repeat across asset classes: a trade works, assets under management grow, and the manager starts to believe the liquidity that was there at entry will be there at exit. Then volatility spikes, and the exit door narrows. The lesson is not new, but it is expensive to relearn. Our rule is simple: if we cannot exit a position in a way that preserves our decision-making ability under stress, we do not take it in the first place. That means looking beyond the bid-ask spread and asking who is on the other side, how deep is the book, and what happens when the narrative flips.
Volatility is not the enemy; it is the information
Volatility gets a bad name. In our world, it is not a risk to be avoided but a signal to be read. When markets move fast, they are telling you something about the consensus view, about leverage, about positioning. The trick is to stay rational enough to read the signal without being swept up in the noise. That requires a process that is not dependent on being right every day. It requires a framework that allows you to be wrong, to adjust, and to still be in the game when the opportunity set clears.
Macro context matters, but it is not an excuse for sloppy execution. We have seen plenty of investors blame the central bank or the geopolitical backdrop for losses that were really a function of poor position sizing and a lack of respect for liquidity. The macro environment is the weather; you do not get to choose it, but you do get to choose how you dress. That means building portfolios that can withstand a range of outcomes, not just the one you find most likely.
In the end, risk discipline is not about being conservative. It is about being deliberate. It is about knowing exactly what you own, why you own it, and what will make you sell. If you cannot answer those questions in the middle of a drawdown, you are not investing; you are hoping. And hope is not a strategy.
For investors navigating this environment, the takeaway is straightforward: size positions for the worst-case liquidity scenario, not the average one. Respect the fact that markets can stay irrational longer than you can stay solvent. And never confuse the absence of volatility with the absence of risk. The calm is often when the seeds of the next dislocation are being planted.
This post is for informational purposes only and does not constitute investment advice. Past performance is not indicative of future results. All investment strategies involve risk, including the possible loss of principal.