Opening

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Opening

The period at the beginning of the trading session officially designated by an exchange, during which all transactions are considered made "at the opening." Related: Close.
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

Opening

1. The beginning of a trading session on an exchange.

2. The first price of a security at the beginning of a trading day. In this sense, the opening is also called the opening price.
Farlex Financial Dictionary. © 2012 Farlex, Inc. All Rights Reserved

opening

1. The beginning of a trading session.
2. The initial price at which a security trades for the day. Also called opening price.
Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.

Opening.

The first transaction in each security or commodity when trading begins for the day occurs at what's known as its opening, or opening price.

Sometimes the opening price on one day is the same as the closing price the night before. But that's not always the case, especially with stocks or contracts that are traded in after-hours markets or when other factors affect the markets when the stock or commodity is not trading.

The opening also refers to the time that the market opens for trading or the time a particular instrument begins trading. For example, New York Stock Exchange (NYSE) opens at 9:30 ET. The first transaction in a single security may be at that time or at a later time.

Dictionary of Financial Terms. Copyright © 2008 Lightbulb Press, Inc. All Rights Reserved.
References in classic literature ?
For fully five hundred feet I continued to climb, until at length I reached the opening in the stem which admitted the light.
I soon reached him and presently we were both ascending the long ladder toward the opening above.
Drawing closer to the opening leading into the bright daylight, Bradley surveyed what lay beyond.
Here he discovered a door already ajar opening into a large, circular chamber, the walls and floors of which were covered with the skins of wild beasts and with rugs of many colors; but what interested him most was the occupants of the room--a Wieroo, and a girl of human proportions.
At a little distance from a bald rock, and directly in its front, they entered a grassy opening, which they prepared to cross.
Profiting by so easy a method of retreat, Duncan stepped after him, and was gladly closing the slight cover to the opening, when he felt it drawn from his hand by the beast, whose shaggy form immediately darkened the passage.
Again and again did Eric seek to force an opening under the other's guard, and just as often were his blows parried.
He struck the edge of the door of the opposite terminus of the rocky tunnel with his knees, slipped backward, clutched desperately for a moment, and at last hung half within and half without the opening; but he was safe.
Presently, however, he heard a light tap at his door, then the door opened slowly, and he could see the flash of Lady Arabella's white dress through the opening.
The Lion went back to the opening where the beasts of the forest were waiting for him and said proudly:
Qu'elle sorte!" articulated the Frenchman, without opening his eyes.
I followed them to my study, and found lying on my writing-table still, with the selenite paper weight upon it, the sheet of work I had left on the afternoon of the opening of the cylinder.