AI & Technology Terms

Algorithm A set of rules or instructions a computer follows to solve a problem or make decisions. In finance, algorithms power everything from robo-advisors to fraud detection.

API (Application Programming Interface) A way for different software systems to communicate. Financial apps use APIs to connect to your bank accounts securely.

Categorization The process of sorting transactions into groups (groceries, dining, entertainment, etc.). AI-powered categorization learns from patterns to sort automatically.

Hallucination When an AI generates confident but incorrect information. A significant risk when using LLMs for financial advice.

Large Language Model (LLM) AI systems like Claude and ChatGPT that understand and generate human-like text. Used throughout this book for financial analysis and decision support.

Machine Learning A type of AI that improves through experience. Your budgeting app learns your spending patterns through machine learning.

Natural Language Processing (NLP) AI that understands human language. Enables you to ask questions like "How much did I spend on food last month?" instead of navigating menus.

Plaid A service that securely connects financial apps to your bank accounts. Most budgeting apps use Plaid for account linking.

Prompt The text you provide to an AI to get a response. Better prompts lead to better outputs. Chapter 5 provides a library of financial prompts.

Robo-Advisor An automated investment service that builds and manages portfolios based on algorithms. Examples include Betterment and Wealthfront.

Sentiment Analysis AI that analyzes text (news, social media) to determine whether the overall mood is positive, negative, or neutral. Used in market analysis.

Personal Finance Terms

APR (Annual Percentage Rate) The yearly interest rate charged on borrowed money, including fees. Used for credit cards and loans.

APY (Annual Percentage Yield) The yearly return on savings or investments, accounting for compound interest. Used for savings accounts and CDs.

Asset Allocation How your investments are divided among different asset types (stocks, bonds, cash, etc.). A key factor in investment risk and return.

Compound Interest Interest earned on both your original investment and previously earned interest. The mathematical force behind long-term wealth building.

Diversification Spreading investments across different assets to reduce risk. "Don't put all your eggs in one basket."

Emergency Fund Savings set aside for unexpected expenses or income loss. Typically 3-6 months of expenses, held in accessible accounts.

ETF (Exchange-Traded Fund) A basket of investments that trades like a stock. Often used for low-cost, diversified investing.

Expense Ratio The annual fee charged by investment funds, expressed as a percentage. Lower is generally better.

FICO Score A credit score ranging from 300-850 that lenders use to evaluate creditworthiness. Higher scores mean better loan terms.

Fiduciary A professional legally required to act in your best interest. Fee-only financial advisors are typically fiduciaries.

High-Yield Savings Account A savings account offering higher interest rates than traditional banks, typically from online banks.

Index Fund A fund designed to match the performance of a market index (like the S&P 500). Known for low costs and broad diversification.

IRA (Individual Retirement Account) A tax-advantaged account for retirement savings. Traditional IRAs offer tax deductions now; Roth IRAs offer tax-free withdrawals later.

Liquidity How quickly an asset can be converted to cash. Savings accounts are highly liquid; real estate is not.

Net Worth Total assets minus total liabilities. A snapshot of overall financial health.

Rebalancing Adjusting your portfolio back to your target allocation after market movements cause drift.

Tax-Loss Harvesting Selling investments at a loss to offset capital gains taxes. Robo-advisors often automate this.

401(k) An employer-sponsored retirement account with tax advantages. Many employers match contributions up to a certain percentage.

Budgeting Terms

Cash Flow Money coming in (income) minus money going out (expenses). Positive cash flow is essential for saving and investing.

Fixed Expenses Costs that stay the same each month: rent, loan payments, subscriptions. Easier to budget than variable expenses.

Variable Expenses Costs that fluctuate: groceries, dining, entertainment. Where most budget optimization happens.

Zero-Based Budgeting A budgeting method where every dollar is assigned a job. Income minus all allocations equals zero.

50/30/20 Rule A budgeting guideline: 50% to needs, 30% to wants, 20% to savings and debt repayment.

Sinking Fund Money set aside regularly for a known future expense (vacation, car maintenance, annual insurance premium).

Debt Terms

Avalanche Method A debt payoff strategy targeting highest interest rate debt first. Minimizes total interest paid.

Snowball Method A debt payoff strategy targeting smallest balance first. Provides psychological wins through quick payoffs.

Debt Consolidation Combining multiple debts into a single loan, ideally at a lower interest rate.

Principal The original amount borrowed, excluding interest.

Secured Debt Debt backed by collateral (mortgage, car loan). Lower risk to lenders, typically lower rates.

Unsecured Debt Debt without collateral (credit cards, personal loans). Higher risk to lenders, typically higher rates.

Tax Terms

Adjusted Gross Income (AGI) Your total income minus specific deductions. Used to determine eligibility for various tax benefits.

Capital Gains Profit from selling an investment. Short-term gains (held <1 year) are taxed higher than long-term gains.

Deduction An expense that reduces taxable income. Can be standard (flat amount) or itemized (specific expenses).

Marginal Tax Rate The tax rate applied to your last dollar of income. Often confused with effective (average) tax rate.

Tax-Advantaged Account Accounts with special tax treatment: 401(k), IRA, HSA, 529 plans. Used to reduce lifetime tax burden.

Withholding Taxes automatically deducted from your paycheck by your employer.

W-2 Tax form showing wages earned and taxes withheld from an employer.

1099 Tax forms reporting non-wage income (freelance, investments, etc.).

Investment Terms

Bear Market A market decline of 20% or more from recent highs. Associated with pessimism and economic downturns.

Bull Market An extended period of rising prices. Associated with optimism and economic growth.

Dividend A portion of company profits paid to shareholders. Some investors build portfolios focused on dividend income.

Dollar-Cost Averaging Investing a fixed amount regularly regardless of price. Reduces the impact of market timing.

Market Capitalization The total value of a company's outstanding shares. Used to categorize companies as small-cap, mid-cap, or large-cap.

Portfolio Your collection of investments across all accounts.

Risk Tolerance Your ability and willingness to accept investment losses in exchange for potential gains.

Volatility How much an investment's price fluctuates. Higher volatility means bigger swings up and down.