Standard deviation is a metric that shows the variability of a security’s returns over time. It can be used to gauge volatility based on past performance and compare a future return to past returns.

Rate of return represents the percentage net gain or loss of an investment's initial cost over a period of time. The rate of return calculates the percentage change from the beginning to the end of a ...

The world of microeconomics and business decision-making hinges upon a key concept: marginal cost. In the simplest terms, marginal cost represents the expense incurred to produce an additional unit of ...

Perpetual bonds have no maturity date, allowing them to pay interest indefinitely, making them appealing for long-term income. They come in different types, such as government and corporate bonds, ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...