Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Return on investment (ROI) measures the amount of ...

Tim Smith has 20+ years of experience in the financial services industry, both as a writer and as a trader. Thomas J. Brock is a CFA and CPA with more than 20 years of experience in various areas ...