Glossary.
The vocabulary, defined plainly — with the book that teaches it.
200 financial terms written the way a CPA would explain them to a client — short, honest, and paired with the book that actually teaches the concept end-to-end.
Real Estate
1031 Exchange
A 1031 exchange lets you defer capital gains tax when you sell an investment property by rolling the proceeds into an…
BRRRR Strategy
BRRRR stands for Buy, Rehab, Rent, Refinance, Repeat. You buy a distressed property cheap, renovate it to force appre…
Cap Rate (Capitalization Rate)
Cap rate is the annual net operating income of a property divided by its purchase price, expressed as a percentage. I…
Cash-on-Cash Return
Cash-on-cash return is annual pre-tax cash flow divided by the actual cash you put into a deal. Unlike cap rate, it a…
Depreciation Recapture
When you own rental property you get to deduct depreciation each year against rental income — a real tax break. But w…
Gross Rent Multiplier (GRM)
The Gross Rent Multiplier (GRM) is a quick screening metric for rental property investment, calculated by dividing th…
House Hacking
House hacking means buying a small multi-unit property (or a single-family with a rentable basement/ADU), living in o…
LTV (Loan-to-Value)
LTV is the loan balance divided by the property's appraised value, expressed as a percentage. Lenders use it to price…
NOI (Net Operating Income)
NOI is a property's gross rental income minus all operating expenses — taxes, insurance, maintenance, property manage…
PMI (Private Mortgage Insurance)
PMI is insurance you pay for that protects the LENDER (not you) if you default. On conventional loans it's required w…
Qualified Opportunity Zone
A Qualified Opportunity Zone (QOZ) is a designated low-income census tract where you can defer — and partially elimin…
Retirement
4% Rule
A retirement-withdrawal heuristic from the 1990s Trinity Study: withdraw 4% of your portfolio in year one, then adjus…
401(k)
An employer-sponsored retirement account where you defer part of your salary into investments, usually pre-tax (tradi…
Backdoor Roth IRA
A workaround for high earners who exceed the Roth IRA direct-contribution income limits: contribute non-deductible do…
Catch-Up Contribution
A catch-up contribution is an additional amount savers aged 50 or older are permitted to contribute to tax-advantaged…
Defined Benefit Plan
A traditional pension where the employer promises a specific monthly payment in retirement, usually based on years of…
Defined Contribution Plan
A retirement plan — 401(k), 403(b), 457, SIMPLE, SEP — where the contributions are defined but the eventual balance d…
Inherited IRA
An inherited IRA (also called a beneficiary IRA) is a retirement account opened when someone receives IRA assets from…
Longevity Risk
The risk of outliving your money. Average life expectancy is misleading because it's an average — a healthy 65-year-o…
Qualified Charitable Distribution (QCD)
A qualified charitable distribution is a direct transfer of up to $108,000 per year (2026 limit, indexed annually for…
Qualified Distribution
A withdrawal from a retirement account that meets the IRS rules to avoid penalty and, in a Roth, avoid tax on earning…
RMD (Required Minimum Distribution)
The minimum amount the IRS forces you to withdraw each year from tax-deferred retirement accounts (traditional IRA, 4…
Roth IRA
An individual retirement account funded with after-tax dollars, where qualified withdrawals in retirement come out ta…
SECURE Act
The Setting Every Community Up for Retirement Enhancement (SECURE) Act of 2019, and its successor SECURE 2.0 (2022),…
Sequence of Returns Risk
The risk that the order of investment returns — not just the average — wrecks a retirement plan. Two retirees with th…
Target Date Fund
A single mutual fund that holds a mix of stock and bond index funds and automatically shifts toward bonds as the targ…
Traditional IRA
An individual retirement account funded with pre-tax dollars (deduction may phase out if you or a spouse have a workp…
Vesting
The schedule on which employer-contributed money — 401(k) match, RSUs, profit-sharing — actually becomes yours to kee…
Personal Finance
50/30/20 Rule
A budgeting shortcut that splits after-tax income into 50% needs, 30% wants, and 20% savings or debt payoff. It's a s…
Amortization
Amortization is the process of gradually paying off a debt through scheduled, periodic payments that cover both princ…
Amortization Schedule
An amortization schedule is a complete table of loan payments showing, for each period, how much goes toward interest…
Annual Percentage Rate (APR)
APR is the yearly cost of borrowing expressed as a percentage, including both the interest rate and mandatory fees su…
APR vs APY
APR (annual percentage rate) is the simple annualized rate before compounding; APY (annual percentage yield) includes…
Balance Transfer
A balance transfer moves existing credit card debt from one card (typically high-rate) to another that offers a promo…
Capital Gains Tax
Capital gains tax applies to profits realized from selling a capital asset — stocks, real estate, mutual funds, or ot…
Compound vs. Simple Interest
Simple interest is calculated exclusively on the original principal balance, so the amount of interest earned or owed…
Credit Utilization
The percentage of your available revolving credit you're actually using — total card balances divided by total card l…
Debt Avalanche
A debt-payoff method that targets the highest interest rate first while paying minimums on everything else. It saves…
Debt Snowball
A debt-payoff method that targets the smallest balance first, regardless of interest rate, while paying minimums on e…
Effective Tax Rate
The effective tax rate is the average rate at which a person or company actually pays tax on total income, calculated…
Emergency Fund
Cash set aside in a high-yield savings or money-market account to cover unexpected expenses or income gaps — job loss…
FICO Score
A credit score from Fair Isaac Corporation, ranging 300–850, that lenders use to price risk on mortgages, auto loans,…
Fiduciary
A fiduciary is a person or institution legally and ethically obligated to act in the best interest of another party —…
Fiduciary Duty
A legal obligation to act in the client's best interest, not just recommend something "suitable." Registered Investme…
FIRE (Financial Independence, Retire Early)
A personal-finance movement built on aggressive saving (often 40-70% of income) for 10-20 years to reach financial in…
Fixed vs. Variable Rate
A fixed interest rate stays the same for the life of the loan or deposit — payments are predictable regardless of wha…
Lifestyle Inflation
The pattern of spending more as you earn more — bigger house, nicer car, pricier restaurants — so your savings rate n…
Liquid Assets
Assets you can turn into cash quickly without taking a big haircut on price — checking and savings, money-market fund…
Long-Term Capital Gain
A long-term capital gain is the profit realized from selling a capital asset — such as stocks, bonds, real estate, or…
Marginal Tax Rate
The marginal tax rate is the percentage of tax applied to the last dollar of taxable income — the rate at which addit…
Medicare IRMAA
IRMAA (Income-Related Monthly Adjustment Amount) is a surcharge added to standard Medicare Part B and Part D premiums…
Net Worth
Everything you own minus everything you owe. Assets include cash, investments, retirement accounts, and the market va…
Principal vs. Interest
In the context of loans and debt instruments, principal refers to the original amount borrowed or the outstanding bal…
Refinancing
Replacing an existing loan with a new one, usually to lower the rate, shorten the term, or pull cash out of equity. W…
Risk Capacity
Risk capacity is the objective, quantifiable measure of how much investment risk an investor can financially afford t…
Risk Tolerance
Risk tolerance is the degree of variability in investment returns that an investor is psychologically willing and emo…
Roth Conversion
A Roth conversion is the process of moving money from a traditional IRA or pre-tax 401(k) into a Roth IRA, triggering…
Savings Rate
The percentage of take-home income that goes to savings and investments instead of spending. It's the single biggest…
Short-Term Capital Gain
A short-term capital gain arises when an investor sells a capital asset — such as a stock, bond, real estate, or coll…
Sinking Fund
A pool of cash you build up monthly for a known, future expense — property taxes, a vacation, a new roof, Christmas.…
Social Security Bend Points
Social Security bend points are the income thresholds in the Primary Insurance Amount (PIA) formula that determine ho…
Suitability Standard
The suitability standard is the regulatory obligation that requires a broker-dealer or financial representative to re…
Tax-Advantaged
Tax-advantaged describes investment accounts, savings vehicles, or financial products that receive preferential treat…
Tax-Deductible
A tax-deductible expense or contribution is one that the Internal Revenue Service allows taxpayers to subtract from t…
Tax-Deferred
Tax-deferred status means that taxes on investment gains, interest, or contributions are postponed until a future dat…
Investing
Alpha
Alpha measures the excess return a portfolio or fund generates above what its benchmark or risk model predicts. A pos…
Asset Allocation
Asset allocation is how you split your portfolio across asset classes — typically stocks, bonds, cash, and sometimes…
Back-End Load
A back-end load, formally called a contingent deferred sales charge (CDSC), is a mutual fund fee assessed when an inv…
Bear Market
A drop of 20% or more from a recent high, sustained over weeks or months. Bear markets are shorter on average than bu…
Beta
Beta measures how much a stock tends to move relative to the broader market. A beta of 1.0 means the stock historical…
Book Value
Book value is a company's total assets minus total liabilities as reported on the balance sheet — the accounting net…
Bull Market
A sustained period of rising prices, conventionally defined as a 20% or greater rally from a recent low. Bull markets…
CAPE Ratio
The Cyclically Adjusted Price-to-Earnings (CAPE) ratio, also known as the Shiller P/E after Yale economist Robert Shi…
Capital Asset Pricing Model (CAPM)
The Capital Asset Pricing Model (CAPM) defines the expected return of any asset as the risk-free rate plus a premium…
Capital Gain
The profit from selling an asset for more than you paid. Held for a year or less, the gain is short-term and taxed as…
Compound interest
Interest earned on both the original principal and on previously accumulated interest. The mechanism by which $1 inve…
Convexity
Convexity measures the curvature in the relationship between a bond's price and interest rates. Duration provides a l…
Corporate Bond
Corporate bonds are debt securities issued by companies to raise capital, offering investors a fixed or floating inte…
Cost Basis
Cost basis is what you paid for an investment, including commissions and adjusted for things like reinvested dividend…
Coupon Rate
The coupon rate is the fixed annual interest payment a bond issuer promises to pay, expressed as a percentage of the…
Credit Spread
A credit spread is the difference in yield between a bond and a comparable risk-free benchmark — typically U.S. Treas…
Diversification
Diversification means spreading money across many investments so that the failure of any one doesn't wreck the portfo…
Dividend Growth Rate
The annualized percentage rate at which a company increases its dividend payment over time. Consistent dividend growt…
Dividend Reinvestment (DRIP)
Automatically using cash dividends to buy more shares (including fractional shares) of the security that paid them, i…
Dividend Yield
Dividend yield is the annual dividend per share divided by the current share price, expressed as a percentage. It tel…
Dollar-cost averaging (DCA)
Investing a fixed dollar amount at regular intervals (e.g., $500 monthly) regardless of share price. The discipline r…
Dollar-Weighted Return
The dollar-weighted return (DWR), also called the money-weighted return, measures the actual return an investor earne…
Drawdown
A drawdown measures the decline in a portfolio's value from a previous peak to a subsequent trough, expressed as a pe…
Duration
Duration measures a bond's sensitivity to changes in interest rates, expressed in years. More precisely, it estimates…
Efficient Frontier
The efficient frontier is the set of portfolios that offer the highest expected return for each level of risk (standa…
Efficient Market Hypothesis
The theory that asset prices already reflect all available information, so consistently beating the market through st…
Enterprise Value (EV)
Enterprise value (EV) is a comprehensive measure of a company's total worth that captures not just the market value o…
EPS (Earnings Per Share)
EPS is the company's net profit divided by the number of shares outstanding. It's the slice of last year's profit att…
ETF (Exchange-Traded Fund)
An ETF is a basket of securities that trades on a stock exchange like a single stock. You can buy or sell it any time…
Expense Ratio
The expense ratio is the annual fee a fund charges, expressed as a percentage of your invested balance. It's deducted…
Fama-French Factors
Fama-French factors are systematic return drivers identified by Eugene Fama and Kenneth French that extend CAPM. The…
Forward P/E Ratio
The forward price-to-earnings ratio divides a stock's current share price by the consensus analyst estimate for next…
Free Cash Flow (FCF)
Free cash flow (FCF) is the cash a company generates from its operations after paying for the capital expenditures re…
Front-End Load
A front-end load is a sales charge deducted from an investor's contribution at the time of purchase, before any money…
Growth Investing
Growth investing focuses on companies expected to grow revenues and earnings significantly faster than the market ave…
Hedge Fund
A hedge fund is a lightly regulated pooled investment vehicle available to accredited investors and institutions that…
Illiquid Asset
An illiquid asset is an investment or holding that cannot be quickly sold or converted to cash at or near its fair ma…
Index Fund
An index fund is a mutual fund or ETF that holds every stock in a benchmark — like the S&P 500 — in roughly the same…
Inflation Hedge
An inflation hedge is an investment or asset class expected to maintain or increase its purchasing power when inflati…
Internal Rate of Return (IRR)
The internal rate of return (IRR) is the discount rate at which the net present value of all cash flows associated wi…
Intrinsic Value
Intrinsic value is what a business is actually worth based on the cash it can produce over its lifetime, discounted b…
Junk Bond
Junk bonds — formally called high-yield bonds — are corporate bonds rated below investment grade (below BBB− by S&P o…
Liquidity
Liquidity describes how quickly and easily an asset can be converted into cash at or near its fair market value witho…
Load Fund
A load fund is a mutual fund that charges investors a sales commission — called a "load" — either when shares are pur…
Management Fee
A management fee is the annual charge levied by a fund manager, investment adviser, or financial planner for overseei…
Margin of safety
The discount between what an investment is worth and the price you pay for it — buying at a price meaningfully below…
Mark-to-Market
Mark-to-market (MTM) is an accounting method that values assets and liabilities at their current fair market value ra…
Market Capitalization
Market cap is the share price multiplied by total shares outstanding — the price tag the public market puts on the en…
Max Drawdown
Max Drawdown is the largest peak-to-trough decline in a portfolio's value over a specified period, expressed as a per…
Modern Portfolio Theory
Modern Portfolio Theory (MPT), introduced by Harry Markowitz in 1952, argues that investors can construct portfolios…
Monte Carlo Simulation
Monte Carlo simulation applies thousands of randomized scenarios — each with different sequences of returns, inflatio…
Municipal Bond
Municipal bonds ("munis") are debt securities issued by states, cities, counties, and other government entities to fu…
Mutual Fund
A mutual fund pools money from many investors to buy a portfolio of stocks, bonds, or other assets. Unlike ETFs, mutu…
Net Asset Value (NAV)
Net asset value is total assets minus total liabilities, expressed either as a whole dollar figure or on a per-share…
No-Load Fund
A no-load fund is a mutual fund that does not charge investors a sales commission at the time of purchase, sale, or t…
Nominal Return
The nominal return is the raw percentage gain or loss on an investment over a given period, stated in current dollars…
Owner Earnings
Owner earnings is a concept popularized by Warren Buffett in his 1986 letter to Berkshire Hathaway shareholders as a…
P/E Ratio (Price-to-Earnings)
The P/E ratio is the stock's price divided by its earnings per share over the last 12 months. It tells you how many d…
Payout Ratio
The payout ratio measures the proportion of a company's earnings that is distributed to shareholders as dividends, ca…
PEG Ratio
The PEG ratio adjusts the price-to-earnings ratio for expected earnings growth, dividing the P/E by the company's pro…
Price-to-Book Ratio (P/B)
The price-to-book ratio (P/B) compares a company's market capitalization to its book value — the accounting value of…
Price-to-Earnings Ratio (P/E)
The price-to-earnings ratio (P/E) is the most widely cited valuation multiple in equity investing, dividing a stock's…
Price-to-Sales Ratio (P/S)
The price-to-sales ratio (P/S) divides a company's market capitalization by its trailing twelve-month revenue, expres…
Private Equity
Private equity refers to ownership stakes in companies that are not listed on public stock exchanges, typically held…
R-Squared
R-Squared (R²) measures the percentage of a fund's or portfolio's price movements that can be explained by movements…
Real Return
The real return is the investment return an investor earns after stripping out the effect of inflation, expressing gr…
REIT (Real Estate Investment Trust)
A REIT is a company that owns and usually operates income-producing real estate — apartments, warehouses, cell towers…
Return on Assets (ROA)
Return on assets (ROA) measures how efficiently a company converts its asset base into net profit, calculated by divi…
Revenue Per Share
Revenue per share is total annual revenue divided by diluted shares outstanding. It measures how much top-line sales…
ROE (Return on Equity)
ROE is net income divided by shareholders' equity — the profit a company generates per dollar of book equity. A high,…
ROIC (Return on Invested Capital)
ROIC measures how much profit a company generates for every dollar of capital — both debt and equity — invested in th…
Sharpe Ratio
The Sharpe Ratio measures how much excess return a portfolio earns per unit of total risk (standard deviation). It is…
Sortino Ratio
The Sortino Ratio refines the Sharpe Ratio by dividing excess return only by downside deviation — the standard deviat…
Standard Deviation
Standard deviation quantifies how much an investment's returns vary around its average. A higher standard deviation s…
Tax-Loss Harvesting
Selling investments at a loss to offset realized capital gains (and up to $3,000 of ordinary income per year), then r…
Time-Weighted Return
The time-weighted return (TWR) measures the compound growth rate of a portfolio by breaking the total period into sub…
Total Return
Total return is the full return on an investment — price change plus dividends or interest, reinvested. It's the hone…
Treasury Bond
Treasury bonds are long-term debt securities issued by the U.S. federal government with maturities of 10 to 30 years.…
Treynor Ratio
The Treynor Ratio measures excess return earned per unit of market risk (beta), rather than per unit of total volatil…
Value at Risk (VaR)
Value at Risk (VaR) estimates the maximum loss a portfolio is expected to incur over a given time period at a specifi…
Value investing
The investment philosophy of buying assets for meaningfully less than their conservatively-estimated intrinsic value,…
Wash Sale
An IRS rule that disallows a tax loss if you buy the same or a substantially identical security within 30 days before…
Yield Curve
The yield curve plots the interest rates (yields) of bonds with identical credit quality — typically U.S. Treasuries…
Yield to Maturity (YTM)
Yield to Maturity (YTM) is the total annualized return an investor earns if a bond is purchased at its current market…
Money Mindset
Anchoring Bias
The tendency to lean too hard on the first number you see when making a decision — your 'anchor' — even when that num…
Behavioral Finance
The study of how real human psychology — fear, ego, mental shortcuts — shapes money decisions, instead of assuming pe…
Confirmation Bias
The habit of seeking out information that confirms what you already believe and quietly discounting anything that con…
Herd Mentality
The pull to do what everyone else is doing — buy what's hot, sell what's falling — because being wrong with the crowd…
Loss Aversion
The well-documented finding that losing $100 hurts roughly twice as much as winning $100 feels good. It's why people…
Mental Accounting
The habit of treating money differently depending on where it came from or what 'bucket' you've assigned it to, even…
Overconfidence Bias
Believing your judgment, stock picks, or market timing is better than it actually is. Surveys consistently find that…
Prospect Theory
The Kahneman-Tversky model of how people actually make decisions under risk — and the academic backbone of behavioral…
Recency Bias
The mental shortcut of treating whatever happened recently as the new normal — projecting the last 12 months forward…
Status Quo Bias
The preference for leaving things the way they are, even when a better option is obvious and easy. In personal financ…
Trading & Markets
Bid-Ask Spread
The gap between the highest price a buyer is willing to pay (the bid) and the lowest price a seller will accept (the…
Call Option
A contract that gives the buyer the right — not the obligation — to buy 100 shares of a stock at a fixed price (the s…
Delta (Options Greek)
How much an option's price is expected to change for a $1 move in the underlying stock. Call deltas run from 0 to 1;…
Gamma (Options Greek)
How much an option's delta changes for a $1 move in the underlying. Gamma is highest for at-the-money options near ex…
Implied Volatility (IV)
The market's forward-looking guess at how much a stock will move, baked into option prices. High IV means options are…
Leverage
Using borrowed money or derivatives to control a larger position than your cash alone would allow. Leverage amplifies…
Limit Order
An instruction to buy at no more than a set price, or sell at no less than a set price. You trade certainty of fill f…
Margin (Brokerage)
Borrowing money from your broker to buy more securities than your cash would allow. The borrowed amount accrues inter…
Market Order
An instruction to your broker to buy or sell immediately at whatever price is currently available. You get speed and…
Put Option
A contract that gives the buyer the right — not the obligation — to sell 100 shares of a stock at a fixed strike pric…
Short Selling
Borrowing shares from your broker, selling them at the current price, and hoping to buy them back later at a lower pr…
Stop-Loss Order
A resting order that converts to a market sell once the stock trades through a trigger price you set. It's meant to c…
Strike Price
The fixed price at which an option contract can be exercised — where a call buyer can buy the shares, or a put buyer…
Time Decay (Theta)
The rate at which an option loses value each day, all else equal, as expiration approaches. Theta is expressed as the…
Vega (Options Greek)
How much an option's price changes for a 1-point move in implied volatility. Long options are long vega — they gain v…
Crypto & Web3
Bitcoin Halving
A scheduled event roughly every four years where the reward miners earn for adding a new Bitcoin block gets cut in ha…
Blockchain
A shared, append-only ledger that thousands of computers keep identical copies of. Transactions are grouped into 'blo…
Cold Storage
Keeping crypto private keys completely offline — typically on a dedicated hardware wallet, sometimes on a paper backu…
Crypto Mining
The process of using computing power to validate transactions and add new blocks to a proof-of-work blockchain, in ex…
Crypto Wallet
Software (or a small hardware device) that stores the private keys that prove you own a given crypto address. The wal…
Gas Fee
The transaction fee paid to the network (usually Ethereum) to have your transaction included in a block and executed.…
Hash (Cryptographic)
A one-way math function that turns any input — a word, a file, a block of transactions — into a fixed-length fingerpr…
Proof of Stake
An alternative to proof-of-work where the right to validate the next block is given to participants who lock up ('sta…
Proof of Work
The consensus mechanism Bitcoin uses to decide who gets to write the next block: miners compete to find a number that…
Smart Contract
A program that lives on a blockchain and automatically executes when its conditions are met — no middleman, no 'pendi…
Business & Entrepreneurship
Burn Rate
Burn rate is how much cash a company loses per month. Gross burn is total monthly cash outflow; net burn is gross bur…
CAC (Customer Acquisition Cost)
CAC is the fully-loaded cost to acquire one paying customer: total sales and marketing spend in a period divided by n…
Churn Rate
Churn rate is the percentage of customers (or revenue) that leave in a given period. Logo churn counts customers lost…
COGS (Cost of Goods Sold)
COGS is the direct cost of producing the goods or services you sold — raw materials, direct labor, factory overhead f…
Current Ratio
The current ratio measures a company's ability to pay its short-term obligations using its short-term assets. It is c…
Customer LTV (Lifetime Value)
LTV is the total gross profit you expect to earn from a customer over their entire relationship with you. A common sh…
Debt-to-Equity Ratio
The debt-to-equity ratio (D/E) compares a company's total debt to shareholders' equity, revealing how much of the bus…
EBITDA
EBITDA is Earnings Before Interest, Taxes, Depreciation, and Amortization. It's operating income with depreciation an…
Gross Margin
Gross margin is revenue minus cost of goods sold (COGS), divided by revenue. It tells you how much of every dollar of…
Net Profit Margin
Net profit margin is the percentage of revenue that remains as net income after all expenses — including cost of good…
Operating Income
Operating income is what's left after you subtract COGS plus all operating expenses (salaries, rent, marketing, R&D)…
Operating Margin
Operating margin measures the percentage of revenue a company retains as operating profit after paying for the cost o…
Quick Ratio
The quick ratio (also called the acid-test ratio) is a stricter liquidity measure than the current ratio. It excludes…
Return on Investment (ROI)
Return on investment (ROI) is one of the most widely used financial metrics in business and personal investing, expre…
Runway (Startup)
Runway is how many months a startup can keep operating before it runs out of cash, calculated as cash on hand divided…
Working Capital
Working capital is current assets (cash, receivables, inventory) minus current liabilities (accounts payable, short-t…
Three more rooms in the library.
The vocabulary lives here. The questions, the lines worth memorizing, and the deeper reading live next door.