Peter Gratton, Ph.D., is a New Orleans-based editor and professor with over 20 years of experience in investing, risk management, and public policy. Peter began covering markets at Multex (Reuters) ...

Elvis Picardo is a regular contributor to Investopedia and has 25+ years of experience as a portfolio manager with diverse capital markets experience. Suzanne is a content marketer, writer, and ...

A pronoun takes the place of a noun close nounA noun is the name of a thing, such as an object, a place, or a person. in a sentence. Pronouns are short words like 'it', 'she', 'he', 'you', 'we', 'they ...

A rectangular array of numbers in row and column format. The numbers can be integers or floating point. Mathematical matrices are used in linear algebra, physics, engineering, computer graphics and ...