The Math of the Middle
Most people believe wealth is built through exceptional gains. That large outcomes are driven by large years.
It is intuitive. It is also incorrect.
Over time, outcomes are driven less by how often you outperform, and more by how rarely you incur meaningful losses. This is the real math of the middle. Rarely discussed. Yet this is where most outcomes are determined.
The mathematics of compounding is straightforward. It does not require brilliance; but it demands continuity. It simply does not tolerate interruptions.
Portfolios that avoid large drawdowns, even without standout years, often compound more effectively than those that alternate between extremes. There is no defining moment of outperformance. Only the absence of damage.
A similar pattern has played out in practice.
Over a 14-year period, a large pension portfolio, as described by Howard Marks, never ranked in the top quartile in any given year. It also never fell into the bottom quartile. Its performance remained consistently in the middle – between the 27th and 47th percentile.
And yet, over the full period, it finished in the top 4% of all portfolios.
There were no exceptional years, no catastrophic ones. There was simply the absence of damage.
This is also how I think about our portfolio. I have no interest in being in the Top 5% in any given year. And I am absolutely unwilling to be in the Bottom 5%, especially in a negative market year.
This is not about playing small. This is about playing long.
The arithmetic explains why.
Losses are not symmetrical. They are punitive to compounding.
A portfolio that compounds at 15% for five years appears to be performing well. Introduce a single year of decline – even a moderate one – and the outcome changes materially. A negative 20% year in year six reduces the six-year return to approximately 8% per annum.
One year does not reduce overall returns by 20%. It reduces them by nearly half.
The damage is not limited to the loss itself. It also extends to the compounding that no longer occurs. Once disrupted, compounding does not resume from where it left off. It restarts from a lower base, on a weaker trajectory.
And importantly – and I cannot emphasize this enough – the longer your horizon, whether in the past or in the future, the greater the cost of that interruption.
If outcomes are shaped by the avoidance of interruption, then the objective of a portfolio construct cannot simply be to generate returns. It must be to preserve the very conditions required for compounding to continue.
This fundamentally changes the problem.
The question is no longer how to maximize returns in any given year, but how to sustain them over long periods without disruption.
In practice, this means placing less emphasis on capturing every upside, and more on limiting the magnitude of downside. Not because downside is undesirable in isolation, but because of what it does to the path that follows.
A portfolio that participates less in extreme outcomes, but avoids large drawdowns, can produce a more stable compounding path. This approach rarely stands out in any single year. It becomes evident only over time.
This is often counterintuitive. Strong markets make this approach appear conservative. Stressed markets reveal its real advantage. The difference is not in one year. It is in the continuity of returns across cycles.
Compounding is commonly understood in terms of return. It is better understood in terms of continuity.
The largest outcomes are not the result of occasional outperformance, but of sustained, uninterrupted progress.
The objective cannot be to achieve the highest return in any given year. Rather, it must be to remain in the game long enough for compounding to do its work.
You see the exact same math play out – in real life – when raising children. Their growth isn't defined by a handful of perfect days. It is the result of showing up, day after day, providing a steady foundation, and avoiding permanent harm. It is the quiet power of uninterrupted time.