This term is used in the financial field and more strictly in the Stock Exchange. To fully understand what this expression refers to, it must be explained that financial products (all) are listed on the stock exchange at a time from 9:00 a.m. to 17:30 p.m. On a trading day, a product (any) can experience different fluctuations in its price. Usually this is determined by the market situation (supply and demand) and speculation.
In short, the opening price is the value with which a session begins and is represented by a chart in the form of a horizontal line to the left of the vertical line.
To deepen the explanation, it must be clarified that the opening auction begins at 8:30 am and ends at 9:00 am. In this period of time, a series of buying and selling operations is carried out, giving, in real time, a balanced price at which the closing operations of the opening auction would be executed.
As far as the stock market is concerned, the opening auction is a crucial moment since it is capable of introducing, modifying or canceling orders but it is not susceptible to trading operations.
In practice, financial markets they start their activity or what is the same "open to quote" on Monday (after the weekend) or after a holiday; This action is called market opening. Naturally, the opening price is contingent on business days, depending on the market. However, as a curious fact, Forex It has a more active activity 24 hours a day since, by operating in all the countries of the world, it manages to start its activity in Asia to end in the United States, and through Europe.