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1. An act that requires use of resources or time. In Program Evaluation and Review Technique (PERT), an activity is represented by an arrow on a PERT chart.

2. In investing, the amount of a security's relative trading volume; that is, the amount of money flowing into and out of a security in trading. A high amount of activity means that many shares of the security are being bought and sold at a high rate, while a low level of activity indicates the opposite.


The amount of relative trading volume in a security.
References in periodicals archive ?
Instead, pulseless electrical activity (PEA) has emerged as the most common rhythm found in arrests in the hospital and is increasing among prehospital reports.
The ECG continued to show runs of VT, pulseless electrical activity and bigeminy.
Contrary to results from earlier studies, patients with either ventricular fibrillation or pulseless electrical activity did not seem to benefit from the vasopressin.
Asystoly was the most common rhythm at the time of arrival (n=69, 23.4%) followed by ventricular fibrillation (VF) (n=31, 10.55%) and pulseless electrical activity (PEA) (n=25, 8.5%).