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This is the daily number of shares of a security that change hands between a buyer and a seller. Also known as volume traded. Also see Up volume and Down volume.
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.


The amount of trading sustained in a security or in the entire market during a given period. Especially heavy volume may indicate that important news has just been announced or is expected. See also average daily volume.
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.


Volume is the number of shares traded in a company's stock or in an entire market over a specified period, typically a day.

Unusual market activity, either higher or lower than average, is typically the result of some external event. But unusual activity in an individual stock reflects new information about that stock or the stock's sector.

Dictionary of Financial Terms. Copyright © 2008 Lightbulb Press, Inc. All Rights Reserved.
References in periodicals archive ?
Effect of tidal volume, sampling duration, and cardiac contractility on pulse pressure and stroke volume variation during positive-pressure ventilation.
Respective effects of high airway pressure, high tidal volume, and positive end-expiratory pressure," American Review of Respiratory Disease, vol.
Friedman, "Mechanical ventilation with high tidal volume induces inflammation in patients without lung disease," Critical Care, vol.
These included blood pressure (BP) and heart rate (HR) by continuous electrocardiogram and BP monitoring, Fi[O.sub.2], PEEP, compliance, resistance, peak inspiratory pressure, respiratory rate (total breaths per minute (b/min) and spontaneous b/min), spontaneous minute volume, expiratory tidal volume and actual minute volume.
In a small retrospective study conducted in 12 patients with both subarachnoid hemorrhage and ARDS, a lung protective strategy (i.e., tidal volume of 5-8 ml/kg and PEEP of 10-15 cm [H.sub.2]O) was employed with resulting hypercapnia (pC[O.sub.2] of 50-60 mm Hg; Petridis et al., 2010).
Burtx et al., "A trial of intraoperative low tidal volume ventilation in abdominal surgery," The New England journal of medicine, vol.
During NPPV tidal volume, respiratory rate, airway pressures, leakage, and spontaneous breathing activity were continuously measured and recorded every 10 s using commercial software (VentView 2.0, Drager Medical Ag & Co, Lubeck, Germany).
Despite over 100 clinical trials of both supportive therapies and biological agents, the only unequivocally effective intervention over the last two decades has been the use of low tidal volume ventilation.
As with the PEEP device, the relationship between exhaled tidal volume, exhaled peak airflow, and pressure in the Sham device was measured with a lung simulator for 50 breaths.
There are two main components of breathing: tidal volume and lung capacity.
Initially, participants were mechanically ventilated in the volume-induced mode, with a tidal volume of 8 ml per kilogram of body weight, inspiratory flow of 60 litres per minute (square wave), with hyperinflated cuff, positioned in a supine 30-degree head-up position, and underwent tracheal aspiration.