The Centre of Gravity (Schwerpunkt)

"The centre of gravity is always found where the mass is concentrated most densely. It is against this that the blow must be directed." — Carl von Clausewitz

Military Context

Clausewitz introduced the centre of gravity: the hub of an enemy's power, the source of their strength, or the critical vulnerability sustaining their entire war effort. It might be a capital, the main army, or the bond holding a coalition together.

He argued commanders should not dissipate effort on secondary objectives but identify the centre of gravity and mass all available force against it.

Note its nature: it is not necessarily the strongest part but the part whose loss collapses the whole. That distinction determines whether the blow is aimed correctly.

The Wall Street Translation

Markets present thousands of tickers, reports, and headlines daily. Attending to all of it produces information overload and decision fatigue.

Identifying the Market's Centre of Gravity

In any cycle one dominant factor drives most asset prices and everything else is secondary:

• Liquidity (2020–2021): post-pandemic, the centre was central bank liquidity and zero rates, with fundamentals subordinate to money supply
• Inflation and rates (2022): the centre shifted abruptly to inflation and the hiking path, and highly valued growth was hit hardest by rising discount rates
• The AI narrative (2023–2024): companies linked to AI drew enormous flows that overwhelmed general macro concern

Concentrating Capital

Having found the centre, concentrate there rather than spreading across thirty sectors and diluting returns.

But the Centre Is Only Confirmable Afterwards

This belongs alongside the above, or the chapter implies more confidence than is warranted.

All three examples are obvious today, and identifying the current centre in real time was anything but. In 2021 a great deal of analysis held that liquidity was still the centre while it was already rotating to inflation.

The correct use is therefore explanation rather than prediction: it helps you understand why a portfolio behaved as it did, while concentrating on that basis requires identifying the rotation before the market does — precisely what Big Debt Crises Chapter 6 elsewhere in this library shows is extremely hard.

Actionable Trading Rules

1. Ask one question regularly: "What single factor is driving the index right now?" If you cannot answer, you have not found the centre.
2. Follow the leader, not the laggard: when the centre shifts, the first and strongest movers lead; do not buy laggards because they look cheap.
3. Stay humble about your own read: if recent performance is your evidence, that is attribution after the fact rather than identification.

Relevance to a Retirement Portfolio

For retirees the concept's value is explaining the source of volatility rather than guiding reallocation.

When your portfolio performs unusually well or badly in a given year, the cause is usually the prevailing centre — rates, inflation, a dominant narrative — rather than the quality of your choices. Recognising that prevents two errors: overestimating your skill in a tailwind and doubting a sound long-term plan in a headwind.

A broadly diversified portfolio's advantage is that it never requires you to identify the centre — it holds something benefiting under every regime, at the cost of never being optimal in any single one.