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
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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Return on capital is a profitability and efficiency measure that shows how much profit a company generates relative to the capital used in the business. In fundamental investing, return on capital helps investors evaluate how effectively a company turns capital into earnings. It is especially useful for analyzing business quality, capital efficiency, reinvestment opportunities, competitive
Fair value is an estimate of what an asset, business, stock, or investment is reasonably worth based on available information. In fundamental investing, fair value helps investors compare a security’s market price with a reasonable estimate of value. A stock trading below fair value may be undervalued. A stock trading above fair value may be
An overvalued stock is a stock that appears to trade above its estimated intrinsic value. In fundamental investing, an overvalued stock matters because the market price may already reflect overly optimistic expectations about future growth, earnings, margins, or business quality. A company can be excellent and still have an overvalued stock if investors pay too
An undervalued stock is a stock that appears to trade below its estimated intrinsic value. In fundamental investing, an undervalued stock matters because it may offer investors the chance to buy ownership in a business for less than the business is worth. The goal is not simply to buy a stock that has fallen in
Multiple compression happens when investors become willing to pay a lower valuation multiple for the same company, earnings, revenue, EBITDA, or cash flow. In fundamental investing, multiple compression matters because a stock can decline even when the underlying business is still growing. If the market assigns a lower valuation multiple to a company, the stock
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