John Bogle
John Bogle's framework turns an investing idea into a decision memo: what to check, what to avoid, and what would change your mind. Use the 48 principles below as a checklist—not as buy/sell signals—and verify any numbers or quotes with primary sources. If you're new, start with Index Investing to frame business quality, valuation discipline, and risk, then browse topics to find the rules that match your situation. Pair each principle with a concrete trigger so you can review whether you followed the process after the decision.
- Start with the principles as questions (not trade signals).
- Write down your thesis, risks, and “what would change my mind”.
- Cross-check with scenarios, filings, and your own data sources.
Educational only. This is not investment advice.
"Don't look for the needle in the haystack. Just buy the haystack."
About John Bogle
John Clifton "Jack" Bogle (May 8, 1929 – January 16, 2019) was an American investor, business magnate, and philanthropist. He founded The Vanguard Group in 1975 and created the first index mutual fund available to individual investors, revolutionizing the investment industry. Bogle is credited with pioneering low-cost investing and championing the rights of individual investors against Wall Street's high fees. Under his leadership, Vanguard grew to become one of the largest investment management companies in the world, managing trillions of dollars in assets. His investment philosophy was simple yet revolutionary: most investors are better off investing in low-cost, broadly diversified index funds rather than trying to beat the market through active management. He famously stated, "Don't look for the needle in the haystack. Just buy the haystack!" Bogle dedicated his career to reducing investment costs and advocating for investor interests. His impact on the industry has saved investors hundreds of billions of dollars in fees. Warren Buffett called him a "hero" who did more for American investors than anyone else.
Core Investment Principles
Value Discipline
Never overpay for a security, no matter how exciting the story. The price you pay determines your return. Discipline in ...
→Focus on Intrinsic Value
Always estimate the intrinsic value of a business before investing. Compare price to value, not price to past price. The...
→Quality Business Criteria
Invest in businesses with durable competitive advantages, strong cash flows, and management integrity. Quality businesse...
→Business Moat Assessment
Before investing, identify the moat — the sustainable competitive advantage that protects the business from competitors....
→Earnings Quality Analysis
Not all earnings are equal. Look for recurring, cash-backed earnings rather than accounting profits. High-quality earnin...
→Browse John Bogle's Principles by Topic
Famous Quotes
"Time is your friend; impulse is your enemy."
"In investing"
"you get what you don't pay for. Costs matter."
"The miracle of compounding returns is overwhelmed by the tyranny of compounding costs."
"Stay the course."
