Methods of the Sima Ch. 1: Benevolence as the Root — Capital Protection and Fiduciary Duty

"The ancients took benevolence as the root and governed through righteousness. To end war through war is not to love war." — Sima Rangju

Military Context

The Methods of the Sima is attributed to Sima Rangju, Grand Marshal of the state of Qi during the Spring and Autumn period, and is one of the Seven Military Classics. It opens by laying a philosophical foundation: force may be used only from benevolence and righteousness — to secure the state and restore order — never from greed or rage.

Sima Rangju left a much-quoted warning: "Though a state be large, those who love war will perish; though the realm be at peace, those who forget war are endangered."

The structure deserves attention: it rejects both extremes at once. The warlike exhaust the state; those who forget war lose the capacity to defend it — the correct position lies between, not at either end.

The Wall Street Translation

In capital allocation, your money is your army. Entering without clear justification is launching a reckless war.

1. Fiduciary Duty Toward Capital

Treat your account as assets held in trust. Capital takes years to accumulate and a few reckless leveraged trades can erase it in hours.

• Abandon the gambler's mindset: every trade needs an explicit risk/reward basis, never boredom, revenge, or chasing
• Principal first: the primary objective is protecting capital; profit is a by-product of sound risk control

2. Never Trade in Revenge

Sima Rangju warns against marching in anger. After a loss, traders feel a powerful urge to double down and win it back — which almost always ends in disaster.

This corresponds exactly to the finding in Thinking, Fast and Slow Chapter 4 elsewhere in this library: Kahneman showed that facing a certain loss, people abruptly become extreme risk-seekers. A military observation from twenty-five centuries ago and a modern psychology experiment reached the same conclusion.

3. Both Extremes Must Be Avoided

The second half — "those who forget war are endangered" — is routinely overlooked: excessive caution is also a failure mode.

For investors this means avoiding risk entirely and holding everything in cash destroys purchasing power just as surely over long horizons. Inflation is a slow but certain adversary, and staying out of markets leaves you undefended against it.

Actionable Trading Rules

1. Set a hard capital protection rule: risk no more than 1% of total assets on any speculative trade.
2. Enforce a cooling-off period: after two stopped-out trades in one day, close the platform for 24 hours to block revenge trading.
3. Enter only on positive expectancy: require a reward-to-risk ratio of at least 2:1.

Relevance to a Retirement Portfolio

"Love war and perish, forget war and be endangered" is this chapter's most complete guidance for retirees, because it names both failure modes.

Loving war corresponds to overtrading and excessive risk — especially dangerous in retirement, where there is no second accumulation period.

Forgetting war corresponds to excessive caution — holding all retirement money in cash and deposits feels safe while inflation erodes it steadily across a twenty or thirty year retirement. This is the error retirees make more often and recognise less.

The correct position holds a diversified portfolio that can cross cycles, neither chasing nor fleeing.