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 Nasdaq Composite is a stock market index that tracks thousands of stocks listed on the Nasdaq stock exchange. In fundamental investing, the Nasdaq Composite matters because it is one of the most widely followed benchmarks for growth-oriented, technology-heavy, and innovation-driven public companies. Investors use it to monitor market performance, compare portfolio returns, evaluate index
The Dow Jones Industrial Average, often called the Dow, is a stock market index that tracks 30 large publicly traded companies in the United States. In fundamental investing, the Dow Jones Industrial Average matters because it is one of the oldest and most widely recognized U.S. stock market benchmarks. Investors use it to follow broad
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The S&P 500 is a stock market index that tracks the performance of large publicly traded companies in the United States. In fundamental investing, the S&P 500 matters because it is one of the most commonly used benchmarks for the U.S. stock market. Investors use it to measure market performance, compare portfolio returns, evaluate index
An index fund is an investment fund designed to track the performance of a specific market index, such as the S&P 500, Nasdaq-100, or a total stock market index. Index funds can be structured as mutual funds or ETFs (Exchange-Traded Funds). In fundamental investing, index funds matter because they give investors diversified exposure to a
A mutual fund is a pooled investment fund that collects money from many investors and uses it to buy a portfolio of securities, such as stocks, bonds, or other assets. In fundamental investing, mutual funds matter because they give investors access to diversified portfolios managed according to a specific investment objective, strategy, or asset class.
An ETF, or exchange-traded fund, is an investment fund that holds a basket of assets and trades on a stock exchange like a stock. ETFs can hold stocks, bonds, commodities, sectors, indexes, or other investments. In fundamental investing, ETFs matter because they allow investors to gain diversified exposure to a market, industry, strategy, or asset
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EBIT stands for earnings before interest and taxes. In fundamental investing, EBIT is a profitability metric used to measure a company’s operating earnings before the effects of financing costs and income taxes. It helps investors evaluate how much profit a business generates from its operations before capital structure and tax differences. EBIT is often similar
EBITDA stands for earnings before interest, taxes, depreciation, and amortization. In fundamental investing, EBITDA is a profitability metric used to estimate a company’s operating earnings before financing costs, income taxes, and certain non-cash accounting expenses. Investors often use EBITDA to compare companies with different debt levels, tax rates, depreciation policies, or acquisition histories. Why EBITDA
Net profit margin is a profitability metric that shows the percentage of revenue left as net income after all expenses have been deducted. In fundamental investing, net profit margin helps investors understand how much of a company’s revenue becomes final profit for shareholders after operating costs, interest, taxes, depreciation, amortization, and other expenses. Why Net
Operating margin is a profitability metric that shows the percentage of revenue left after subtracting cost of goods sold and operating expenses. In fundamental investing, operating margin helps investors understand how efficiently a company turns revenue into operating profit before interest, taxes, and non-operating items. It is an important measure of business efficiency, cost control,
