Money and wealth
The ten cow story: why one income stream is a risk
A story told to children in Japan, and kept as a symbol at the Tokyo Stock Exchange, about what happens when all your wealth stands in one place.
28 October 2026 · 1 min read
In Japan there is a story told to children that remains a symbol at the Tokyo Stock Exchange. Imagine owning ten cows, and having them as your only source of income. If a disease strikes and wipes out the herd, your entire wealth is gone in one season.
Preserve your capital first
The first principle is the plainest one: at the very least, protect what you already have. Growth matters less than not losing everything at once.
Spread the herd
Diversification spreads wealth across several sources. It reduces how exposed you are to any single shock and gives you a better chance of long-term financial stability. If you are standing on one source of income, the story asks a simple question: where will the other nine come from?
Listen for the right signal
The exchange is also known for its bell, which traders read as a signal of market sentiment. The lesson we take from it is about attention and decisiveness: listen to the right signals, and act when they tell you it is time to invest in your own life. Discipline of this kind compounds over time.
Act today. Tomorrow is for the faint-hearted.
