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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.


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.


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.

References in periodicals archive ?
Prior research has shown the changes that occur in total plasma volume during normal pregnancy and PE; our study focused on SW content analysis without performing individual, total plasma volumes.
Clinical signs of normal plasma volume expansion during pregnancy.
Total plasma volumes were unknown, and patients' liquid intakes prior to phlebotomy procedures were not known; if available, this information may have improved our results.
2003), which decreases plasma volume during the initial stages of dry forage feeding (Blair-West and Brook, 1969).
3] to be lost from the blood into the rumen which in turn caused a decrease in circulating plasma volume and resulted in activation of the renin-angiotensin system and thus feeding was suppressed.
Women who had low postpartum plasma volume alone, without hypercholesterolemia, faced a 2.
Aardenburg theorized that low plasma volume is associated with decreased cardiovascular reserves and that these women lack the hemodynamic adaptation that normally occurs in pregnancy.
It appears that they have low plasma volume even before pregnancy and consequently they return to their abnormal prepregnancy volume.
Plasma Station Distribution, Plasma Volume and Blood Product Revenue of Major Blood Product Enterprises in China, 2012
We have been focusing a good deal of our attention to the Asian market as we seek to fulfill the need in that region for safer and more effective plasma volume expansion solutions.
Hextend is BioTime's proprietary physiologically balanced blood plasma volume expander for treating the loss of blood volume during major surgery.
PentaLyte is a pentastarch-based blood plasma volume expander similar in formulation to Hextend.