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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 ?
Although we could find significant relationship between different crude 30-day mortality rates according to hospital PCI volume, we could not find a relationship between hospital volume and 30-day risk-adjusted mortality rates following PCI in Korea.
As with the cost analyses, FQ-1 and FY-1 percent of hospital volumes, and FY-1 unit volume were as effective in predicting significant, negative relationships as FQ percent of hospital volume, and more effective than any other measure.
Hospital volume and surgical morbidity in the United States.
Further, such expansion may be undesirable especially if expected volume does not justify expansion on clinical grounds, because recent studies concerning the impact of physician and hospital volume on outcome quality for surgical procedures clearly indicate that hospital volume plays a major role in reducing adverse outcomes (Luft et al.
The Effect of Hospital Volume on the In-Hospital Complication Rate in Knee Replacement Patients.
The contribution of hospital volume, payer status, and other factors on the surgical outcomes of scoliosis patients: a review of 3,606 cases in the State of California.
This could affect readmission interpretation related to hospital volume and academic affiliation.
748 patients found no evidence of higher in-hospital mortality in patients undergoing PCI at medium-volume hospitals (200-399 cases/year) compared with patients treated at hospitals with annual PCI volumes of 400 cases of more suggesting current ACC/AHA PCI hospital volume minimums might merit reevaluation (9).
Evidence linking hospital volume to outcomes was already well-recognized in the clinical literature by the mid-1990s, and statistics on hospital volume in New York were becoming available to the public.
Three-year data on surgical patients in Pennsylvania support using surgeon and hospital volume as part of the credentialing process for bariatric surgery centers of excellence, according to a study of 14,716 patients who underwent bariatric surgery in Pennsylvania hospitals from 2000 to 2003.
Medium hospital volume was def'med as doing 10-19 ovarian cancer surgeries per year, while high hospital volume was defined as doing 20 or more per year.

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