The Methods of the Sima — Chapter 1: Benevolence & Fiduciary Stewardship (仁本与义立)

"In ancient times, taking up arms was for the purpose of stopping violence and protecting the innocent, not for personal ambition or destruction." — Sima Rangju (司马穰苴)

The Military Context

The Methods of the Sima (《司马法》), attributed to the Spring and Autumn period strategist Sima Rangju, is one of China's Seven Military Classics. The text opens with a profound philosophical foundation: war is a grave matter of state survival and should only be undertaken out of "Benevolence" (仁本) and "Justice" (义立)—to protect the realm and restore stability, never out of reckless greed or anger.

Sima Rangju warns that commanders who engage in unprovoked, reckless warfare inevitably exhaust their resources and destroy their armies.

The Wall Street Translation

In trading and capital allocation, your capital is your army. Entering the market without a clear purpose or taking wild, uncalculated risks is equivalent to waging reckless warfare.

1. Fiduciary Duty to Your Capital (对待资本的信托责任)

Treat your trading account with the gravity of a fiduciary. Capital accumulation takes years of hard work, but a few reckless, highly leveraged trades can wipe out a portfolio in hours. - No Gambler Mindset: Every trade must be executed with a defined risk-reward rationale, never out of boredom, revenge, or reckless FOMO. - Protect the Downside First: Your primary objective is capital preservation (Benevolence to Capital). Profit is a byproduct of sound risk management.

2. Avoiding "Revenge Trading" (切忌报复性交易)

Sima Rangju cautions against fighting out of anger. When a trader suffers a loss, the temptation to immediately double down to "get money back from the market" is strong. This is revenge trading, and it consistently leads to catastrophic drawdowns.

3. Long-Term Capital Stewardship (长远资本可持续性)

Focus on compound growth over decades rather than 100% returns in a week. True market survival requires building an enduring system that withstands bad economic regimes.

Actionable Trading Rules

1. Establish a Capital Preservation Clause: Never risk more than 1% of total portfolio equity on any speculative setup.
2. Implement a 24-Hour Cooling Off Period: If you suffer 2 consecutive stop-outs in a single day, immediately shut down your trading platform for 24 hours to prevent revenge trading.
3. Focus on Expected Value (EV): Only enter setups where the reward-to-risk ratio is at least 2:1 (e.g. risking $100 to make $200).