Investment Concepts
Master the core principles of value investing.
AI Speculative Mania
The hypothesis that the 2020s AI investment cycle represents the largest speculative bubble in history, with hyperscalers committing over 100% of cash flow to AI infrastructure
Asymmetric Risk
The investment principle of structuring bets so that potential gains far exceed potential losses, creating favorable risk/reward ratios even with imperfect accuracy.
Behavioral Bias
Systematic cognitive biases that cause investors to make irrational decisions, deviating from rational economic behavior and leading to investment losses.
Book Value vs Intrinsic Value
Book value (per-share accounting value) increasingly understates Berkshire's intrinsic value as accounting rules only write down impaired assets, never revaluing winners upward.
Capital Allocation
The process by which a company's management deploys its available capital — investing in growth, repurchasing shares, paying dividends, or acquiring other businesses — to maximize long-term value.
Circle of Competence
The boundary of knowledge and expertise within which an investor can make accurate predictions. Buffett advises staying within this circle and resisting the temptation to overreach.
Compounding
The process by which investment returns generate their own returns over time, creating exponential growth. Described by Einstein as the eighth wonder of the world.
Contrarian Investing
The investment strategy of buying assets that are out of favor or undervalued because of widespread pessimism, and selling when optimism pushes prices too high.
Conviction
The unwavering belief in an investment thesis that allows an investor to hold through volatility and criticism, based on deep understanding of the business fundamentals.
Decentralized Management
Berkshire Hathaway's management model where subsidiary CEOs operate with full autonomy, making operational decisions without corporate interference.
Elephant-Sized Acquisitions
Berkshire's preference for "elephant-sized" acquisitions — large deals that can deploy significant capital at good returns, often worth billions.
GAAP Volatility
The requirement to mark investment portfolios to market each quarter causes wild swings in reported earnings, which Buffett argues distorts true business performance.
Home-State Insurance Model
National Indemnity's innovation of creating separate insurance companies in individual states, each focused on a single jurisdiction with independent agents and large-company capabilities.
Incentive Alignment
The principle that management compensation structures should align executive behavior with shareholder interests, including both growth and return metrics
Investment Concepts
Index of all investment concepts covered in this wiki
Insurance Float
Premiums collected upfront but paid out later, creating "float" that Berkshire invests at high returns — the foundation of Berkshire's capital advantage.
Insurance Underwriting Cycle
The recurring pattern in the P&C insurance industry where periods of soft pricing (low premiums, high competition) alternate with hard markets (high premiums, strict underwriting).
Intrinsic Value
The true underlying worth of a business, independent of its stock price. The key metric value investors compare against market price to identify undervalued opportunities.
Investment Managers
Todd Combs and Ted Weschler, the two investment managers hired by Buffett to manage portions of Berkshire's equity portfolio with $10-20B+ mandates each.
K-Shaped Economy
An economic recovery where upper-income households prosper while lower-income households stagnate, creating divergent consumer behavior patterns
Long-Term Thinking
The investment approach of holding quality businesses for extended periods, allowing compounding and business value to accumulate, rather than trading based on short-term market movements.
Margin of Safety
The principle of buying securities at a price significantly below their intrinsic value, providing protection against errors in calculation or adverse events.
Moat (Economic Moat)
The competitive advantage that protects a business from competitors, allowing it to sustain superior returns over long periods.
Momentum Strategy
An investment approach that allocates to the largest companies based on market weight, creating self-reinforcing price increases
Mr. Market
A mental model introduced by Benjamin Graham representing the stock market as a manic-depressive investor who offers prices that fluctuate wildly based on emotions rather than fundamentals.
Network Effects
Comprehensive guide to network effects - the mechanism where every new user makes the product more valuable to all other users
Passive Investing
Investment strategy that tracks market indices rather than making active stock selection, now representing over 50% of global AUM and causing significant market distortions
Powerhouse Companies
Berkshire's five to six major wholly-owned operating businesses that generate billions in pre-tax earnings and form the core of Berkshire's non-insurance operations.
The See's Candy Principle
The test for whether a business has genuine pricing power: Can it raise prices without losing customers, and would it earn more money by raising them?
Underwriting Profit
The profit (or loss) from insurance operations after paying claims and expenses, before investment income — the core measure of insurance business quality.