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 bid-ask spread is the difference between the highest price a buyer is willing to pay for a security and the lowest price a seller is willing to accept. In investing, the bid-ask spread is a trading cost and liquidity indicator. A narrow spread usually means a security is highly liquid and actively traded, while
Goodwill impairment is an accounting charge recorded when the carrying value of goodwill on a company’s balance sheet exceeds its recoverable or fair value. In fundamental investing, goodwill impairment matters because it can signal that a past acquisition is performing worse than expected. A goodwill impairment does not usually require a current-period cash payment, but
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Passive investing is an investment approach that seeks to match the performance of a market index or predefined investment strategy rather than outperform it through frequent security selection. In investing, passive investing is most commonly implemented through index funds and ETFs that track benchmarks such as the S&P 500, Russell 2000, broad bond indexes, international
Active investing is an investment approach in which an investor or fund manager selects securities and makes portfolio decisions with the goal of outperforming a benchmark index or achieving a specific investment objective. In fundamental investing, active investing usually involves analyzing individual companies, estimating intrinsic value, comparing market price with business value, and deciding what
Operating liabilities are obligations created by a company’s normal business operations rather than by financing activities. In fundamental investing, operating liabilities help investors understand how much of a company’s day-to-day operations are funded by suppliers, employees, customers, tax authorities, and other operating counterparties. Common operating liabilities include accounts payable, accrued expenses, deferred revenue, and certain
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Growth capex is capital spending intended to expand a company’s future revenue, earnings, capacity, or competitive position. In fundamental investing, growth capex matters because it helps investors separate capital spending required to maintain the existing business from capital spending intended to create future growth. A company may spend heavily on new stores, factories, software systems,
Maintenance capex is the capital spending a company needs to maintain its existing assets, operations, and competitive position. In fundamental investing, maintenance capex matters because it helps investors estimate how much cash a business must reinvest just to stay in place. A company may report strong operating cash flow, but if a large portion of
Operating working capital is the capital tied up in a company’s core operating assets and operating liabilities, usually calculated as operating current assets minus operating current liabilities. In fundamental investing, operating working capital helps investors understand how much cash a business needs to run day-to-day operations. It focuses on items directly related to the business
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Leverage is the use of borrowed money, debt, or fixed financial obligations to increase the potential return of an investment or business. In investing, leverage can amplify gains when things go well, but it can also magnify losses when performance weakens. Fundamental investors study leverage to understand financial risk, balance sheet strength, debt service capacity,
A benchmark index is a standard market index used to compare the performance of an investment, fund, portfolio, or investment manager. In investing, benchmark indexes help investors answer a basic question: did this investment perform well compared with a relevant market standard? Common benchmark indexes include the S&P 500, Dow Jones Industrial Average, Nasdaq Composite,
