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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 ?
In each of the subjects, the following equations were used to calculate the baseline, mid test and post test Plasma volume from the values of hematocrit (Hct%) hemoglobin (Hb mg/dL) (20).
Until now, it has been accepted that thirst is caused by any one of two factors, that is, the decreased circulating plasma volume (Stricker, 1966; Stricker et al.
As establishment of normal pregnancy reference ranges appears imminent, clinical laboratory scientists may do well to consider the total plasma volume (differences) between normal pregnant and PE patients that result in hemodilution and relative hemoconcentration.
Women randomized to the plasma volume expansion group received 500 mL of 6% hexaethyl starch daily.
Furthermore, the optimal replacement fluid should contain about one gram of carbohydrate per minute of work, and an adequate amount of electrolytes that will maintain serum osmolality and plasma volume (13).
Percentage changes in plasma volume (% [DELTA] PV) were calculated using Van Beaumont's equation (1972) - % [DELTA] PV = [100/(100-Hct Pre)]x[(100(Hct Pre Hct Post))/Hct Post] - where % [DELTA] PV = percent change in plasma volume, Hct Pre = hematocrit value Pre RE, and Hct Post = hematocrit value immediately after RE.
For example, after participation in Ramadan fasting, hemoconcentration and a decrease in plasma volume become apparent [7] through increases in hematocrit and hemoglobin (indicating a decrease of 7% in plasma volume), and a concentration of plasma electrolytes [4,6].
Hextend (6% Hetastarch in Lactated Electrolyte Injection) is BioTime's commercially-available blood plasma volume expander used to treat hypovolemia (low blood volume).
The local market for plasma volume replacement products is strong,and we are expecting to launch Volplex early in 2004,'' added Mr Appelbee.
Will decrease plasma volume, which is the opposite effect of endurance training (increased plasma volume).