These are 3 Value Assessment principles distilled from John Bogle's writing and public remarks. Use them as a decision checkpoint: translate each rule into a yes/no test, write what evidence would change your mind, and set a review date before you act. When a rule feels vague, open the full principle page and capture the driver you can verify (cash flows, leverage, incentives, competitive edge). This is educational, not investment advice—double-check primary sources and fit every rule to your time horizon, risk budget, and constraints.
"Never overpay for a security, no matter how exciting the story. The price you pay determines your return. Discipline in valuation is the foundation of investment success."
Discipline in valuation determines investment success.
Read Full Analysis →"Always estimate the intrinsic value of a business before investing. Compare price to value, not price to past price. The gap between price and value is where profits are made."
Compare price to intrinsic value, not to past prices.
Read Full Analysis →"Fund returns tend to revert to the mean. Yesterday's winners become tomorrow's losers, and vice versa."
Past fund performance rarely predicts future success.
Read Full Analysis →Use this page as a workflow, not a collection of quotes. Pick 3–5 principles, translate each into a concrete check, and review your decisions on a fixed cadence. These are educational guardrails—always verify facts and match them to your own constraints.
Rehearse a scenario decision → ·Run a weekly toolkit → ·Browse all principles →
Bogle is credited with pioneering low-cost investing and championing the rights of individual investors against Wall Street's high fees. His investment philosophy was simple yet revolutionary: most investors are better off investing in low-cost, broadly divers…
John Bogle has 3 key principles on value assessment. The most important one is "Value Discipline" — Never overpay for a security, no matter how exciting the story.
John Bogle applies value assessment through several key principles including "Value Discipline" and "Focus on Intrinsic Value". These principles guide practical investment decisions and have been tested across decades of market cycles.
John Bogle's approach to value assessment is distinguished by a focus on long-term thinking and fundamental analysis. With 3 specific principles in this area, John Bogle provides a comprehensive framework that investors at any level can study and apply to improve their decision-making.
Treat each principle as a hypothesis. Write the evidence you would need, collect it from primary sources when possible (filings, letters, transcripts), and note what would invalidate the conclusion. If you can’t define inputs and triggers, you’re not applying the rule—you’re quoting it.
Pick a cadence you can sustain (weekly or monthly) and review process signals first: whether you followed your checklist, respected your boundaries, and documented assumptions. Only then look at outcomes. The goal is fewer low-quality decisions, not perfect prediction.
