Weighted average is a powerful tool for an investor. It can be used to evaluate the performance of a portfolio. It can help us better understand how the broader market moves. Even more important, it ...

A trimmed mean is much like a standard mean, which you can derive in Excel using the AVERAGE function. However, instead of using all of the data points to create the mean, a trimmed mean will leave ...

Michael Boyle is an experienced financial professional with more than 10 years working with financial planning, derivatives, equities, fixed income, project management, and analytics. Katrina Ávila ...

There are many situations in investing in which it makes sense to look at how two different numbers related to each other over time. Whether you're talking about two stocks in the same industry, the ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Erika Rasure is globally-recognized as a leading consumer economics subject matter expert, ...