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.

Cost basis is the original purchase price of an asset. Tracking cost basis is key to tax-efficient investing. Many, or all, of the products featured on this page are from our advertising partners who ...

With over four decades of experience as a portfolio manager and educator, Adam B. Frankel simplifies credit card strategies and complex personal finance topics for anyone seeking to gain a better ...