Investing terms can often feel confusing, especially for beginners. This glossary is designed to give you clear, simple definitions of the most important concepts in fundamental investing so you can understand how markets work and make better financial decisions.
Fundamental investing focuses on analyzing businesses based on their financial performance, competitive advantage, and long-term value. To do that effectively, you need to understand the language investors use—from basic terms like assets and cash flow to more advanced concepts like return on invested capital (ROIC) and discounted cash flow (DCF).
In this investing glossary, each term is explained in plain language with a focus on real-world understanding—not technical jargon. Whenever possible, definitions are connected to broader investing concepts so you can see how each idea fits into the bigger picture.
You’ll learn key terms related to:
Financial statements and accounting concepts
Business analysis and valuation methods
Stock market fundamentals and investment strategies
Risk, return, and long-term decision-making
If you’re just getting started, this glossary is the perfect place to build your foundation. If you’re already learning, it will help reinforce and clarify the concepts that matter most.
Start with our complete guide: What Is Fundamental Investing
Then explore deeper topics in Investing Basics and Business Analysis
An expense ratio is the annual fee a fund charges investors to cover operating costs, expressed as a percentage of assets. In investing, expense ratios are most commonly used for ETFs, mutual funds, index funds, and other pooled investment vehicles. The expense ratio reduces investor returns because fund expenses are paid from fund assets. A
A broker-dealer is a financial firm or individual that is legally allowed to buy and sell securities either on behalf of customers or for its own account. In investing, a broker-dealer plays two possible roles. As a broker, it acts as an agent that helps customers buy or sell securities. As a dealer, it acts
A broker is a person or firm that acts as an intermediary between buyers and sellers in a financial transaction. In investing, a broker helps investors buy, sell, or trade securities such as stocks, bonds, ETFs, mutual funds, options, and other financial assets. Brokers connect investors to financial markets and may provide trading platforms, research
A brokerage account is an investment account that lets investors buy, sell, and hold securities such as stocks, bonds, ETFs, mutual funds, options, and other investments. In fundamental investing, a brokerage account is the tool investors use to turn investment decisions into actual portfolio positions. It connects investors to financial markets, allows them to place
The interest coverage ratio is a financial leverage ratio that measures how easily a company can pay interest expense using operating profit. In fundamental investing, the interest coverage ratio helps investors evaluate debt risk, financial strength, solvency, and margin of safety. It answers a simple question: can the company’s earnings comfortably cover the interest payments
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The debt-to-assets ratio is a financial leverage ratio that measures how much of a company’s assets are financed by debt. In fundamental investing, the debt-to-assets ratio helps investors evaluate balance sheet risk, capital structure, financial leverage, and solvency. It shows the percentage of a company’s asset base that is supported by debt rather than equity
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The debt-to-equity ratio is a financial leverage ratio that compares a company’s debt to its shareholders’ equity. In fundamental investing, the debt-to-equity ratio helps investors evaluate how much a company relies on debt financing compared with equity financing. It is commonly used to analyze balance sheet risk, financial leverage, capital structure, solvency, and the company’s
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The quick ratio is a liquidity ratio that measures whether a company can cover its current liabilities using its most liquid current assets. In fundamental investing, the quick ratio helps investors evaluate short-term financial strength without relying on inventory or other current assets that may take longer to convert into cash. It is often called
The current ratio is a liquidity ratio that measures whether a company has enough current assets to cover its current liabilities. In fundamental investing, the current ratio helps investors evaluate short-term financial strength. It shows whether a company may be able to meet obligations due within one year using assets that are expected to become
Shareholders’ equity is the residual ownership interest in a company after subtracting total liabilities from total assets. In fundamental investing, shareholders’ equity helps investors understand the accounting value attributable to shareholders. It appears on the balance sheet and is used in metrics such as book value, return on equity (ROE), debt-to-equity ratio, and price-to-book ratio
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