Only buy something that you’d be perfectly happy to hold if the market shut down for ten years.

The remark encapsulates Buffett’s long-term, business-owner approach to investing: buy securities as if you were buying the underlying enterprise, not a tradable ticker. By imagining a decade-long market closure, the quote strips away liquidity, price quotes, and short-term volatility—forcing the investor to focus on fundamentals such as durable competitive advantage, competent management, balance-sheet strength, and the ability to generate cash over time. It also warns against buying merely because one expects to sell quickly at a higher price. The underlying discipline is patience and conviction: if you wouldn’t be content owning it through an extended period without a market, you likely don’t understand or trust the business enough to own it at all.