Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. The Ulcer Index (UI) is a technical indicator that quantifies downside risk by measuring the depth and duration of ...

Stocks: Real-time U.S. stock quotes reflect trades reported through Nasdaq only; comprehensive quotes and volume reflect trading in all markets and are delayed at least 15 minutes. International stock ...

Daniel Liberto is a journalist with over 10 years of experience working with publications such as the Financial Times, The Independent, and Investors Chronicle. Vikki Velasquez is a researcher and ...