Active investing
BasicsSelecting investments or changing allocations in an attempt to outperform a benchmark.
Why it matters: The fair comparison includes fees, taxes, time, and risk—not only headline return.
Asset allocation
PortfolioHow capital is divided among asset classes such as equities, bonds, and cash.
Why it matters: It often drives more portfolio risk than any individual security choice.
Averaging down
BehaviorBuying more after an investment’s price falls.
Why it matters: It is sensible only after rechecking evidence, value, alternatives, and total position size.
Balance sheet
BusinessA statement of assets, liabilities, and shareholders’ equity at a point in time.
Why it matters: It shows financial resilience and claims that compete with shareholders.
Benchmark
BasicsA reference index or alternative used to evaluate performance and decisions.
Why it matters: Without one, it is easy to mistake a rising market for investing skill.
Bid–ask spread
OrdersThe gap between the highest current bid and lowest current offer.
Why it matters: Crossing a wide spread is a real transaction cost.
Bond
BasicsA debt security representing money lent to a government or company.
Why it matters: Its risks include default, inflation, interest-rate movement, and liquidity.
Capital gain
BasicsThe increase between an asset’s purchase cost and sale proceeds.
Why it matters: A gain usually becomes realized when sold and may have tax consequences.
Catalyst
BusinessAn event that may cause the market to reassess an investment.
Why it matters: A catalyst affects timing; it does not replace a durable thesis.
Compound growth
BasicsReturns earned on both original capital and prior returns.
Why it matters: Time, consistency, taxes, fees, and avoiding permanent loss all affect compounding.
Confirmation bias
BehaviorFavoring information that supports an existing belief.
Why it matters: A deliberate counter-case helps prevent the thesis becoming immune to evidence.
Correlation
PortfolioA measure of how closely two return series tend to move together.
Why it matters: Holdings that look different can still fail at the same time.
Coverage gap
BasicsAn area where a data provider, monitoring rule, or source set has incomplete visibility.
Why it matters: Silence from a tool is not evidence that no material event occurred.
Cost basis
BasicsThe recorded acquisition cost used to measure return and often tax gain or loss.
Why it matters: Fees, FX, corporate actions, and lot methods can affect it.
Dilution
BusinessA reduction in each existing share’s ownership percentage when more shares are issued.
Why it matters: Company growth does not guarantee per-share growth.
Diversification
PortfolioSpreading capital across distinct investments and risks.
Why it matters: It can reduce company-specific damage but cannot eliminate market loss.
Dividend
BasicsA distribution a company or fund pays to shareholders.
Why it matters: It is part of total return, not free money; the asset’s price adjusts around distributions.
EBITDA
BusinessEarnings before interest, taxes, depreciation, and amortization.
Why it matters: It aids comparisons but is not cash flow and omits real economic claims.
Earnings yield
ValuationEarnings per share divided by price, the inverse of the P/E ratio.
Why it matters: It offers an intuitive yield-like view but inherits the weaknesses of the earnings measure.
Enterprise value
ValuationA company value measure that combines equity value with net debt and related claims.
Why it matters: It helps compare operations financed with different mixes of debt and equity.
ETF
BasicsA pooled investment fund whose shares trade on an exchange.
Why it matters: Its mandate, holdings, structure, fees, and concentration still need examination.
Expense ratio
BasicsA fund’s annual operating expenses expressed as a percentage of assets.
Why it matters: Small recurring costs compound into meaningful differences over long periods.
FIFO
OrdersFirst in, first out: the oldest available tax lot is treated as sold first.
Why it matters: Lot selection affects reported cost basis and realized gain or loss.
Free cash flow
BusinessCash generated after operating needs and necessary capital expenditure.
Why it matters: It helps show what remains for debt reduction, reinvestment, buybacks, or distributions.
False positive
BasicsA result flagged as relevant even though it does not actually satisfy the intended condition.
Why it matters: Automated thesis matches must be checked against the original source and your actual driver.
Gross margin
BusinessRevenue minus direct cost of goods or services, divided by revenue.
Why it matters: Its direction can reveal pricing power, product mix, and cost pressure.
Heuristic
BasicsA practical rule used to produce a useful estimate or classification without proving it is correct.
Why it matters: Keyword-based monitoring is fast and explainable but can miss context or unusual wording.
Guidance
BusinessManagement’s forward-looking expectations for future performance.
Why it matters: Compare the drivers and prior accuracy, not only whether guidance beat consensus.
Index fund
BasicsA fund designed to track a defined market index.
Why it matters: It can provide broad exposure efficiently, but the index construction still matters.
Intrinsic value
ValuationAn estimate of an asset’s value based on future economic benefits and risk.
Why it matters: It is uncertain and better treated as a range than a precise target.
Limit order
OrdersAn order to buy at a maximum price or sell at a minimum price.
Why it matters: It controls price if filled, but execution is not guaranteed.
Liquidity
OrdersHow readily an asset can be traded without materially moving its price.
Why it matters: Low liquidity can increase spread, slippage, and difficulty exiting.
Loss aversion
BehaviorThe tendency to feel losses more strongly than equivalent gains.
Why it matters: It can delay necessary exits or encourage premature profit-taking.
Margin of safety
ValuationA buffer between price paid and a conservative value estimate.
Why it matters: It acknowledges estimation error; it does not guarantee a profit.
Market capitalization
ValuationShare price multiplied by shares outstanding.
Why it matters: A low share price does not mean a company is small or cheap.
Market order
OrdersAn instruction to trade promptly at the best available market price.
Why it matters: Execution is prioritized, but the final price can differ from the quote.
Moat
BusinessA durable advantage that helps protect attractive economics from competition.
Why it matters: A moat needs evidence in customer behavior and returns, not just a strong brand narrative.
Net debt
BusinessInterest-bearing debt minus cash and cash-like assets.
Why it matters: It gives a rough view of financial leverage, though not every cash balance is freely available.
Opportunity cost
PortfolioThe return or benefit forgone by choosing one use of capital over another.
Why it matters: Holding is an active choice when better alternatives exist.
P/E ratio
ValuationPrice per share divided by earnings per share.
Why it matters: It reflects expectations but can mislead when earnings are cyclical, negative, or unusually adjusted.
Position size
PortfolioAn investment’s share of total portfolio value or risk.
Why it matters: Even a good idea can cause unacceptable damage when oversized.
Real return
BasicsReturn after accounting for inflation.
Why it matters: Purchasing power, not the nominal account number, is the economic goal.
Realized P&L
PortfolioProfit or loss recorded on shares that have been sold.
Why it matters: It differs from unrealized change on shares still held and may affect taxes.
Rebalancing
PortfolioRestoring a portfolio toward its intended allocation or risk limits.
Why it matters: It can require trimming winners or directing new contributions elsewhere.
Revenue
BusinessIncome generated from selling goods or services before expenses.
Why it matters: Its source, durability, cash collection, and per-share economics matter more than growth alone.
Risk-adjusted return
PortfolioReturn considered alongside the uncertainty and potential loss taken to earn it.
Why it matters: Higher return is not automatically better if it required disproportionate risk.
ROIC
BusinessReturn on invested capital: an estimate of operating profit earned on capital used by the business.
Why it matters: Sustained attractive incremental returns can support compounding.
Slippage
OrdersThe difference between an expected trade price and the actual execution price.
Why it matters: It increases in volatile, illiquid, or fast-moving markets.
Stop order
OrdersAn order activated when a trigger price is reached, commonly becoming a market order.
Why it matters: It can execute far from the trigger during gaps or rapid moves.
Tax lot
OrdersA specific block of shares with its own purchase date and cost.
Why it matters: Selling different lots can change realized gains, holding periods, and records.
Thesis
BusinessA falsifiable explanation of why an investment may produce an attractive outcome.
Why it matters: It connects drivers, evidence, valuation, risk, and reasons to exit.
Tracking difference
BasicsThe gap between a fund’s actual return and the index it aims to follow.
Why it matters: It captures more than the published fee and can reveal implementation drag.
UCITS
BasicsA European regulatory framework for eligible collective investment funds.
Why it matters: The label concerns structure and safeguards; it does not guarantee suitability or low risk.
Volatility
PortfolioThe magnitude and frequency of price movement.
Why it matters: It is not identical to permanent loss, but it can trigger forced or emotional decisions.
Working capital
BusinessShort-term operating assets minus short-term operating liabilities.
Why it matters: Changes can explain why accounting profit and operating cash flow diverge.
Yield
ValuationIncome received over a period expressed relative to price or value.
Why it matters: A high yield can result from a falling price and may signal elevated risk.