In the short run, the market is a voting machine but in the long run, it is a weighing machine.
Core idea
Short-term prices are driven by popularity, emotion, and crowd judgment, while long-term prices tend to reflect underlying business value. The quote separates noise from reality.
Practical application
Do not treat day-to-day market moves as meaningful verdicts on intrinsic value. Use volatility as an opportunity to think more clearly, not as a command to act emotionally.
Why it matters
This is one of the foundational ideas of value investing. Graham is telling the reader that markets can be irrational for long stretches, which is precisely why disciplined investors can outperform.
