Opening Price

• The opening price is the first traded price of a security when an exchange opens for regular trading; it often sets the tone…

Opening Cross

• The Opening Cross is Nasdaq’s auction process used to determine each stock’s official opening price by matching buy and sell interest accumulated before…

Open Market Operations (OMOs)

Key takeaways – Open market operations (OMOs) are purchases and sales of government securities by a central bank (the U.S. Federal Reserve) to adjust…

open house

An open house is a scheduled time when a house (or other dwelling) that’s for sale is opened to the public so prospective buyers…

Open End Management Company

Key takeaways – An open‑end management company is an investment company that creates, manages and redeems shares of open‑end funds — primarily mutual funds…

OPEC and Why It Matters

Key takeaways – The Organization of the Petroleum Exporting Countries (OPEC) is an intergovernmental organization and de facto cartel of major oil-exporting countries formed…

One Tailed Tests

Key takeaways – A one-tailed test (directional test) checks for a change in only one direction — either “greater than” or “less than” —…

One Stop Shop

A one-stop shop is a business or location that offers multiple, often complementary, products and/or services so customers can meet many needs in a…

One Cancels the Other (OCO) Orders

Overview An one‑cancels‑the‑other (OCO) order is a paired set of conditional orders in which the execution of one order automatically cancels the other. Traders…

ombudsman

An ombudsman is an independent official appointed to receive, investigate, and help resolve complaints about an organization, industry, or public authority. Ombudsmen work to…